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As filed with the Securities and Exchange Commission on July 30, 2026

Registration No. 333-283149

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

POST EFFECTIVE AMENDMENT NO. 1
TO

FORM S-3

REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933

GRID DYNAMICS HOLDINGS, INC.

(Exact name of registrant as specified in its charter)

Delaware

(State or other jurisdiction of
incorporation or organization)

83-0632724

(I.R.S. Employer
Identification No.)

6101 Bollinger Canyon Road, Suite 465
San Ramon, California 94583
(650) 523-5000

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Leonard Livschitz
Chief Executive Officer
6101 Bollinger Canyon Road, Suite 465
San Ramon, California 94583
(650) 523-5000

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Matthew D. Berger
Jeffrey S. Hochman
Willkie Farr & Gallagher LLP
787 Seventh Avenue
New York, New York 10019
(212) 728-8000

Approximate date of commencement of proposed sale to the public: From time to time after the effective date of this registration statement.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box: ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box: ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering: ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☐

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

	Large accelerated filer ☐			Accelerated filer ☒
	Non-accelerated filer ☐			Smaller reporting company ☐
				Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of Securities Act. ☐

The registrant hereby amends this registration statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this registration statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the registration statement shall become effective on such date as the Commission acting pursuant to said Section 8(a), may determine.

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EXPLANATORY NOTE

We are filing this Post-Effective Amendment No. 1 to the Registration Statement on Form S-3ASR (File No. 333-283149), because we have ceased to be a “well-known seasoned issuer” (as such term is defined in Rule 405 under the Securities Act of 1933, as amended (the “Securities Act”)) as of the filing of our Annual Report on Form 10-K for the year ended December 31, 2025 on March 5, 2026. Accordingly, we are filing this Post-Effective Amendment No. 1 for the purpose of amending the Registration Statement to convert it from a Form S-3ASR (automatic shelf registration statement) to a Form S-3 (non-automatic shelf registration statement).

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The information in this prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

Subject to completion, dated July 30, 2026

PROSPECTUS

Grid Dynamics Holdings, Inc.

$50,000,000

Common Stock

We may offer and sell, from time to time in one or more offerings, up to $50,000,000 in the aggregate of the securities described in this prospectus.

Each time we offer and sell securities, we will provide a supplement to this prospectus that contains specific information about the offering and the amounts, prices and terms of the securities. The supplement may also add, update or change information contained in this prospectus with respect to that offering. You should carefully read this prospectus and the applicable prospectus supplement before you invest in any of our securities.

We may offer and sell the securities described in this prospectus and any prospectus supplement to or through one or more underwriters, dealers and agents, or directly to purchasers, or through a combination of these methods. If any underwriters, dealers or agents are involved in the sale of any of the securities, their names and any applicable purchase price, fee, commission or discount arrangement between or among them will be set forth, or will be calculable from the information set forth, in the applicable prospectus supplement. See the sections of this prospectus entitled “About this Prospectus” and “Plan of Distribution” for more information. No securities may be sold without delivery of this prospectus and the applicable prospectus supplement describing the method and terms of the offering of such securities.

Our common stock is listed on the Nasdaq Stock Market LLC under the symbol “GDYN.” Each prospectus supplement will indicate whether the securities offered thereby will be listed on any securities exchange.

Investing in our securities involves risks. Please carefully read the information under the headings “Risk Factors” on page 4 of this prospectus and “Item 1A — Risk Factors” of our most recent report on Form 10-K or Form 10-Q that is incorporated by reference in this prospectus before you invest in our securities.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

The date of this prospectus is , 20

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	ABOUT THIS PROSPECTUS					1
	PROSPECTUS SUMMARY					2
	WHERE YOU CAN FIND MORE INFORMATION					3
	INCORPORATION BY REFERENCE					3
	RISK FACTORS					4
	FORWARD-LOOKING STATEMENTS					5
	USE OF PROCEEDS					6
	DESCRIPTION OF COMMON STOCK					7
	PLAN OF DISTRIBUTION					10
	LEGAL MATTERS					12
	EXPERTS					12

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ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement on Form S-3 that we have filed with the Securities and Exchange Commission (the “SEC”), using a “shelf” registration process. Under this shelf registration process, we may sell the securities described in this prospectus from time to time in one or more offerings for an aggregate offering price of up to $50,000,000. This prospectus provides you with a general description of the securities we may offer. We may also add, update or change information contained in this prospectus through one or more supplements to this prospectus or through a free writing prospectus. If there is any inconsistency between information in this prospectus and any prospectus supplement or free writing prospectus, you should rely on the information in the prospectus supplement or free writing prospectus. Before you invest in our securities, you should read both this prospectus and any applicable prospectus supplement together with the additional information described under the heading “Where You Can Find More Information” and “Incorporation by Reference.”

We have not authorized anyone to provide you with information that is different from that contained, or incorporated by reference, in this prospectus, any applicable prospectus supplement or in any related free writing prospectus. We take no responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. This prospectus and any applicable prospectus supplement or any related free writing prospectus do not constitute an offer to sell or the solicitation of an offer to buy any securities other than the securities described in the applicable prospectus supplement or an offer to sell or the solicitation of an offer to buy such securities in any circumstances in which such offer or solicitation is unlawful. You should assume that the information appearing in this prospectus, any prospectus supplement, the documents incorporated by reference and any related free writing prospectus is accurate only as of their respective dates. Our business, financial condition, results of operations and prospects may have changed materially since those dates.

Unless the context indicates otherwise, references to “Grid Dynamics Holdings, Inc.,” “Grid Dynamics,” “we,” “our” and “us” refer, collectively, to Grid Dynamics Holdings, Inc., a Delaware corporation, and its subsidiaries taken as a whole.

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PROSPECTUS SUMMARY

This summary highlights selected information that is presented in greater detail elsewhere, or incorporated by reference, in this prospectus. It does not contain all of the information that may be important to you and your investment decision. Before investing in our securities, you should carefully read this entire prospectus, including the matters set forth in the section titled “Risk Factors” and the financial statements and related notes and other information that we incorporate by reference herein, including our Annual Report on Form 10-K and our Quarterly Reports on Form 10-Q.

Company Overview

Grid Dynamics is an Enterprise Artificial Intelligence (“AI”) transformation partner for the Fortune 1000. We combine deep AI expertise with proven enterprise-scale delivery to help clients identify where to invest in AI, deliver systems that work at scale, and capture real business value from AI deployments. The building blocks of AI have always been our foundation - distributed systems, real-time data, machine learning algorithms, and natural language processing. What has changed is that these capabilities have now converged into Enterprise AI.

This technical heritage is matched with business acumen. We solve the most pressing technical challenges and enable positive business outcomes for enterprise companies. A key differentiator is our nearly two decades of technology leadership and pioneering enterprise AI expertise. This is supported by deep capabilities and ongoing investment in data and machine learning platform engineering, cloud platform and product engineering, Internet of Things and edge computing, and digital engagement services.

Founded in 2006, Grid Dynamics is headquartered in Silicon Valley with offices across the Americas, Europe, and India.

Corporate Information

Our principal executive offices are located at 6101 Bollinger Canyon Road, Suite 465, San Ramon, CA 94583, and our telephone number is (650) 523-5000.

Our website address is www.griddynamics.com. The information on, or that can be accessed through, our website is not part of this prospectus or an accompanying prospectus supplement, and you should not consider information contained on our website in deciding whether to purchase shares of our common stock.

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WHERE YOU CAN FIND MORE INFORMATION

We are subject to the informational and periodic reporting requirements of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Accordingly, we file annual, quarterly and current reports, proxy statements and other information with the SEC. These SEC filings are available to the public from commercial document retrieval services and at the Internet site maintained by the SEC at “http://www.sec.gov.” Copies of certain information filed by us with the SEC are also available on our website at “www.griddynamics.com.” Information accessible on or through our website is not a part of this prospectus.

This prospectus and any prospectus supplement is part of a “shelf” registration statement on Form S-3 that we filed with the SEC and does not contain all of the information in the registration statement. You should review the information and exhibits in the registration statement for further information about us and our consolidated subsidiaries and the securities that we are offering. Forms of any documents establishing the terms of the offered securities are filed as exhibits to the registration statement of which this prospectus forms a part or under cover of a Current Report on Form 8-K and incorporated by reference in this prospectus. Statements in this prospectus or any prospectus supplement about these documents are summaries and each statement is qualified in all respects by reference to the document to which it refers. You should read the actual documents for a more complete description of the relevant matters.

INCORPORATION BY REFERENCE

The SEC’s rules allow us to “incorporate by reference” information into this prospectus, which means that we can disclose important information to you by referring you to another document filed separately with the SEC. The information incorporated by reference is deemed to be part of this prospectus, and subsequent information that we file with the SEC will automatically update and supersede that information. Any statement contained in this prospectus or a previously filed document incorporated by reference will be deemed to be modified or superseded for purposes of this prospectus to the extent that a statement contained in this prospectus or a subsequently filed document incorporated by reference modifies or replaces that statement. This prospectus and any accompanying prospectus supplement incorporate by reference the documents set forth below that have previously been filed with the SEC.

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our Annual Report on Form 10-K for the year ended December 31, 2025, filed with the SEC on March 5, 2026, as amended on Form 10-K/A, filed with the SEC on April 30, 2026;

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our Quarterly Reports on Form 10-Q for the quarters ended March 31, 2026 and June 30, 2026, filed with the SEC on April 30, 2026 and July 30, 2026, respectively;

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our Current Report on Form 8-K filed with the SEC on February 27, 2026; and

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the description of our common stock contained in the Registration Statement on Form 8-A (File No. 001-38685), filed with the SEC on October 3, 2018, and any amendment or report filed for the purpose of updating such description, including Exhibit 4.2 to our Annual Report on Form 10-K, filed with the SEC on March 5, 2026.

All reports and other documents we subsequently file pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act, prior to the termination of this offering but excluding any information furnished to, rather than filed with, the SEC, will also be incorporated by reference into this prospectus and deemed to be part of this prospectus from the date of the filing of such reports and documents.

You may request a copy of these filings, at no cost, by writing or telephoning us at the following address and telephone number:

Grid Dynamics Holdings, Inc.
6101 Bollinger Canyon Road, Suite 465
San Ramon, California 94583
Attn: Investor Relations
(650) 523-5000

Exhibits to the filings will not be sent, however, unless those exhibits have specifically been incorporated by reference in this prospectus or any accompanying prospectus supplement.

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RISK FACTORS

An investment in our securities involves a high degree of risk. The prospectus supplement applicable to each offering of our securities will contain a discussion of the risks applicable to an investment in our securities. Prior to making a decision about investing in our securities, you should carefully consider the specific risk factors discussed in the section of the applicable prospectus supplement titled “Risk Factors,” together with all of the other information contained or incorporated by reference in the prospectus supplement or appearing or incorporated by reference in this prospectus. You should also consider the risks, uncertainties and assumptions discussed under “Part I — Item 1A — Risk Factors” of our most recent Annual Report on Form 10-K and in “Part II — Item 1A — Risk Factors” in our most recent Quarterly Report on Form 10-Q filed subsequent to such Form 10-K that are incorporated herein by reference, as may be amended, supplemented or superseded from time to time by other reports we file with the SEC in the future. The risks and uncertainties we have described are not the only ones we face. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also affect our operations.

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FORWARD-LOOKING STATEMENTS

This prospectus, each prospectus supplement and the information incorporated by reference in this prospectus and each prospectus supplement contain certain statements that constitute “forward-looking statements” within the meaning of Section 27A of the Securities Act, and Section 21E of the Exchange Act. The words “believe,” “may,” “will,” “estimate,” “continue,” “anticipate,” “intend,” “expect,” “could,” “would,” “project,” “plan,” “potentially,” “likely,” and similar expressions and variations thereof are intended to identify forward-looking statements, but are not the exclusive means of identifying such statements. Those statements appear in this prospectus, any accompanying prospectus supplement and the documents incorporated herein and therein by reference, particularly in the sections titled “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and include statements regarding the intent, belief or current expectations of our management that are subject to known and unknown risks, uncertainties and assumptions. You are cautioned that any such forward-looking statements are not guarantees of future performance and involve risks and uncertainties, and that actual results may differ materially from those projected in the forward-looking statements as a result of various factors.

Because forward-looking statements are inherently subject to risks and uncertainties, some of which cannot be predicted or quantified, you should not rely upon forward-looking statements as predictions of future events. The events and circumstances reflected in the forward-looking statements may not be achieved or occur and actual results could differ materially from those projected in the forward-looking statements. Except as required by applicable law, including the securities laws of the United States and the rules and regulations of the SEC, we do not plan to publicly update or revise any forward-looking statements contained herein after we distribute this prospectus, whether as a result of any new information, future events or otherwise.

In addition, statements that “we believe” and similar statements reflect our beliefs and opinions on the relevant subject. These statements are based upon information available to us as of the date of this prospectus, and although we believe such information forms a reasonable basis for such statements, such information may be limited or incomplete, and our statements should not be read to indicate that we have conducted a thorough inquiry into, or review of, all potentially available relevant information. These statements are inherently uncertain and investors are cautioned not to unduly rely upon these statements.

This prospectus and the documents incorporated by reference in this prospectus may contain market data that we obtain from industry sources. These sources do not guarantee the accuracy or completeness of the information. Although we believe that our industry sources are reliable, we do not independently verify the information. The market data may include projections that are based on a number of other projections. While we believe these assumptions to be reasonable and sound as of the date of this prospectus, actual results may differ from the projections.

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USE OF PROCEEDS

Unless we specify otherwise in the applicable prospectus supplement accompanying this prospectus, we will use the net proceeds from the sale of the securities for general corporate purposes.

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DESCRIPTION OF COMMON STOCK

This section describes the general terms and provisions of our common stock. For more detailed information, you should refer to our second amended and restated certificate of incorporation (our “certificate of incorporation”), our amended and restated bylaws (our “bylaws”) and the description of our common stock, each incorporated by reference into the registration statement of which this prospectus forms a part, and filed as exhibits to our Annual Report on Form 10-K for the fiscal year ended December 31, 2025, filed with the SEC on March 5, 2026.

Authorized Shares

We are authorized to issue up to 110,000,000 shares of common stock, $0.0001 par value per share.

Voting Rights

Each holder of our common stock is entitled to one vote for each share on all matters submitted to a vote of the stockholders, including the election of directors. Our stockholders do not have cumulative voting rights in the election of directors. Accordingly, holders of a plurality of the votes cast by the stockholders present in person or represented by proxy at the meeting are able to elect all of the directors.

Dividend Rights

Holders of common stock will be entitled to receive such dividends, if any, as may be declared from time to time by our board of directors in its discretion out of funds legally available therefor. In no event will any stock dividends or stock splits or combinations of stock be declared or made on common stock unless the shares of common stock at the time outstanding are treated equally and identically.

Liquidation, Dissolution and Winding Up

In the event of our voluntary or involuntary liquidation, dissolution, distribution of assets or winding-up, the holders of our common stock will be entitled to receive an equal amount per share of all of our assets of whatever kind available for distribution to stockholders, after the rights of the holders of our preferred stock have been satisfied, as may be established by our board of directors.

Preemptive or Other Rights

Our stockholders will have no preemptive or other subscription rights and there are no sinking fund or redemption provisions applicable to our common stock.

Election of Directors

Our certificate of incorporation provides for our board of directors to be divided into three classes, Class I, Class II and Class III, with only one class of directors being elected in each year and each class (except for those directors appointed prior to our first annual meeting of stockholders) serving a three-year term. There is no cumulative voting with respect to the election of directors, with the result that the election of all directors is determined by a plurality of the votes cast by the stockholders present in person or represented by proxy at the meeting and entitled to vote thereon.

Certain Anti-Takeover Provisions of Delaware Law, our Certificate of Incorporation, and our Bylaws

Our certificate of incorporation provides that our board of directors is classified into three classes of directors. As a result, in most circumstances, a person will be able to gain control of our board only by successfully engaging in a proxy contest at three or more annual meetings.

Our certificate of incorporation does not provide for any action required or permitted to be taken by stockholders to be effected by written consent. Our certificate of incorporation provides that directors may be removed prior to the expiration of their terms by stockholders only for cause and upon the affirmative vote of at least a majority of the voting power of all outstanding common stock.

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Our certificate of incorporation requires that changes or amendments to the certificate of incorporation or the bylaws must be approved by at least a majority of the voting power of the then-outstanding common stock.

Our certificate of incorporation does not provide for cumulative voting in the election of directors. Instead, our board of directors is empowered to elect a director to fill a vacancy created by the expansion of the board of directors or the resignation, death, or removal of a director in certain circumstances. Our advance notice procedures include requirements that the stockholders must comply with in order to nominate candidates to our board of directors or to propose matters to be acted upon at a stockholders’ meeting.

Our certificate of incorporation provides that special meetings of stockholders may be called only by the chairman of our board of directors, our chief executive officer or a majority of our board of directors, and stockholders are specifically denied the right to call special meetings.

Our certificate of incorporation provides that stockholders seeking to bring business before any meeting of stockholders or to nominate candidates for election as directors at any meeting of stockholders must provide advance notice and detailed information as provided in our bylaws. These advance notice procedures may have the effect of precluding the conduct of certain business at a meeting if the proper procedures are not followed and may also discourage or deter a potential acquirer from conducting a solicitation of proxies to elect its own slate of directors or otherwise attempt to obtain control of Grid Dynamics.

Our authorized but unissued common stock and preferred stock are available for future issuances without stockholder approval and could be utilized for a variety of corporate purposes, including future offerings to raise additional capital, acquisitions and employee benefit plans. The existence of authorized but unissued and unreserved common stock and preferred stock could render more difficult or discourage an attempt to obtain control of Grid Dynamics by means of a proxy contest, tender offer, merger or otherwise.

Exclusive Forum

Our bylaws provide that the Court of Chancery of the State of Delaware (or, if the Court of Chancery does not have jurisdiction, another State court in Delaware or the federal district court for the District of Delaware) shall, to the fullest extent permitted by law, be the sole and exclusive forum for the following (except for any claim as to which such court determines that there is an indispensable party not subject to the jurisdiction of such court (and the indispensable party does not consent to the personal jurisdiction of such court within 10 days following such determination), which is vested in the exclusive jurisdiction of a court or forum other than such court or for which such court does not have subject matter jurisdiction):

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any derivative action or proceeding brought on our behalf;

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any action asserting a claim of breach of a fiduciary duty owed by, or otherwise wrongdoing by, any of our directors, officers or other employees to us or our stockholders;

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any action arising pursuant to any provision of the Delaware General Corporation Law (“DGCL”), our certificate of incorporation or bylaws;

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any action to interpret, apply, enforce or determine the validity of our certificate of incorporation or bylaws; and

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any other action asserting a claim that is governed by the internal affairs doctrine shall be in a state or federal court located within the State of Delaware.

However, notwithstanding the exclusive forum provisions, our bylaws explicitly state that they would not preclude the filing of claims brought to enforce any liability or duty created under federal securities laws, including the Exchange Act or the Securities Act.

Although we believe these provisions benefit us by providing increased consistency in the application of Delaware law for the specified types of actions and proceedings, the provisions may have the effect of discouraging lawsuits against us or our directors and officers.

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In addition, our bylaws provide that, unless we consent in writing to the selection of an alternative forum, the federal district courts of the United States of America shall be the exclusive forum for the resolution of any complaint asserting a cause of action arising under the Securities Act.

Registration Rights Agreement

We are party to an amended and restated registration rights agreement with ChaSerg Technology Sponsor LLC (the “Sponsor”) and certain other holders party thereto (the “Existing Holders”) (as amended and restated, the “Registration Rights Agreement”). Under the Registration Rights Agreement, we were required to register for resale our common stock issuable for (i) shares of common stock held by any Existing Holders immediately following the closing of the business combination in March 2020, (ii) any of the 640,000 units issued in private placement transactions by us in October 2018 and (iii) any other equity securities of ours issued or issuable with respect to any securities referenced in clauses (i) and (ii) above by way of a stock dividend or stock split or in connection with a combination of shares, recapitalization, merger, consolidation or reorganization (collectively, “Registrable Securities”).

The holders of a majority-in-interest of the Registrable Securities held by the Existing Holders and any of their permitted transferees were entitled to demand that we register the resale of such securities; provided, however, that we are not required to effect an underwritten offering for any resale of Registrable Securities on a Registration Statement on Form S-3 unless such underwritten offering is reasonably expected to result in gross proceeds in excess of $10 million.

The Existing Holders and their permitted transferees also have certain “piggy-back” registration rights with respect to registration statements and rights to require us to register for resale such securities. We will bear the expenses incurred in connection with the filing of any such registration statements.

Stockholders’ Agreement

On November 13, 2019, ChaSerg Technology Acquisition Corp., the Sponsor, Benhamou Global Ventures, GDB International Investment Limited, GDD International Holding Company, Leonard Livschitz, Victoria Livschitz and Automated Systems Holdings Limited (“ASL”) (together with any individuals or entities that are signatories thereto or become party to the agreement, the “Voting Parties”) entered into a Stockholders’ Agreement, pursuant to which, among other things, the Voting Parties agreed (i) to take all necessary action to cause our board of directors to be comprised of eight directors, (ii) subject to certain share ownership thresholds, to grant each of ASL and the Sponsor rights to designate two directors for election to our board of directors (and the Voting Parties will vote in favor of such designees), (iii) to designate our chief executive officer for election to our board of directors, and (iv) to designate three unaffiliated designates for election to our board of directors.

Listing

Our common stock is listed on the Nasdaq Stock Market LLC under the symbol “GDYN.”

Transfer Agent

The transfer agent and registrar for our common stock is Continental Stock Transfer & Trust Company.

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PLAN OF DISTRIBUTION

We may sell the securities offered under this prospectus in any one or more of the following ways from time to time:

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through agents;

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to or through underwriters;

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through brokers or dealers;

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through a block trade in which the broker or dealer engaged to handle the block trade will attempt to sell the shares as agent, but may position and resell a portion of the block as principal to facilitate the transaction;

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directly to one or more purchasers, including through a specific bidding, auction or other process;

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through a combination of any of these methods of sale; or

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any other method permitted by applicable law.

The securities may be sold in one or more transactions at:

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fixed prices;

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prevailing market prices at the time of sale;

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prices related to the prevailing market prices;

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varying prices determined at the time of sale; or

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negotiated prices.

These sales may be effected in transactions:

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on any national securities exchange or quotation service on which our common stock may be listed or quoted at the time of sale, including the Nasdaq Stock Market;

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in the over-the-counter market;

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otherwise than on such exchanges or services or in the over-the-counter market;

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through the writing of options, whether the options are listed on an options exchange or otherwise;

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through the settlement of short sales; or

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through a combination of the foregoing.

These transactions may include block transactions or crosses. Crosses are transactions in which the same broker acts as agent on both sides of the trade.

If required by applicable law, we will describe in a prospectus supplement the particular terms of the offering of the securities, including the following:

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the names of any agents, underwriters, brokers or dealers;

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the purchase price of the securities and the net proceeds from the sale;

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any underwriting discounts and other items constituting underwriters’ compensation;

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any public offering price and any discounts or concessions allowed or reallowed or paid to dealers;

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any securities exchanges on which the shares of common stock may be listed; and

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any other information we think is material.

Only underwriters named in the prospectus supplement applicable to such offering will be underwriters of the securities offered by such prospectus supplement.

If underwriters are used in the sale, they will acquire the securities for their own account and may resell the securities from time to time in one or more transactions at a fixed public offering price or at varying prices

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determined at the time of sale. The obligations of the underwriters to purchase the securities will be subject to the conditions set forth in the applicable underwriting agreement. We may offer the securities to the public through underwriting syndicates represented by managing underwriters or by underwriters without a syndicate. Subject to certain conditions, the underwriters will be obligated to purchase all of the securities offered by the prospectus supplement, other than securities covered by any over-allotment or other option. Any public offering price and any discounts or concessions allowed or re-allowed or paid to dealers may change from time to time. We may use underwriters with whom we have a material relationship. We will describe the nature of any such relationship in the prospectus supplement naming the underwriter.

We may sell securities directly or through agents we designate from time to time. We will name any agent involved in the offering and sale of securities and we will describe any commissions we will pay the agent in the prospectus supplement. Unless the prospectus supplement states otherwise, our agent will act on a best-efforts basis for the period of its appointment.

We may authorize agents or underwriters to solicit offers from certain types of institutional investors to purchase securities from us at the public offering price set forth in the prospectus supplement pursuant to delayed delivery contracts providing for payment and delivery on a specified date in the future. We will describe the conditions to these contracts and the commissions we must pay for solicitation of these contracts in the prospectus supplement.

We may provide agents and underwriters with indemnification against civil liabilities, including liabilities under the Securities Act, or contribution with respect to payments that the agents or underwriters may make with respect to these liabilities. Agents and underwriters may engage in transactions with, or perform services for, us in the ordinary course of business.

All securities we may offer, other than common stock, will be new issues of securities with no established trading market. Any underwriters may make a market in these securities, but will not be obligated to do so and may discontinue any market making at any time without notice. We cannot guarantee the liquidity of the trading markets for any securities.

Any underwriter may engage in over-allotment, stabilizing transactions, short-covering transactions and penalty bids in accordance with Regulation M under the Exchange Act. Over-allotment involves sales in excess of the offering size, which create a short position. Stabilizing transactions permit bids to purchase the underlying security so long as the stabilizing bids do not exceed a specified maximum price. Syndicate-covering or other short-covering transactions involve purchases of the securities, either through exercise of the over-allotment option or in the open market after the distribution is completed, to cover short positions. Penalty bids permit the underwriters to reclaim a selling concession from a dealer when the securities originally sold by the dealer are purchased in a stabilizing or covering transaction to cover short positions. Those activities may cause the price of the securities to be higher than it would otherwise be. If commenced, the underwriters may discontinue any of the activities at any time.

Any underwriters that are qualified market makers on the Nasdaq Stock Market may engage in passive market making transactions in the common stock on the Nasdaq Stock Market in accordance with Regulation M under the Exchange Act, during the business day prior to the pricing of the offering, before the commencement of offers or sales of the common stock. Passive market makers must comply with applicable volume and price limitations and must be identified as passive market makers. In general, a passive market maker must display its bid at a price not in excess of the highest independent bid for such security; if all independent bids are lowered below the passive market maker’s bid, however, the passive market maker’s bid must then be lowered when certain purchase limits are exceeded. Passive market making may stabilize the market price of the securities at a level above that which might otherwise prevail in the open market and, if commenced, may be discontinued at any time.

The aggregate amount of compensation in the form of underwriting discounts, concessions or fees that may be deemed to be underwriting compensation pursuant to Financial Industry Regulatory Authority, Inc. Rule 5110 will not exceed 8% of the aggregate amount of securities offered pursuant to this prospectus and the applicable prospectus supplement.

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LEGAL MATTERS

The validity of the securities offered hereby will be passed upon for us by Willkie Farr & Gallagher LLP. Additional legal matters may be passed on for us, or any underwriters, dealers or agents, by counsel that we will name in the applicable prospectus supplement.

EXPERTS

The financial statements and management’s assessment of the effectiveness of internal control over financial reporting incorporated by reference in this prospectus and elsewhere in the registration statement have been so incorporated by reference in reliance upon the reports of Grant Thornton LLP, independent registered public accountants, upon the authority of said firm as experts in accounting and auditing.

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PART II
INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

The following table sets forth the fees and expenses (other than underwriting discounts and commissions) expected to be incurred with the offerings described in this registration statement. All amounts set forth in the table below are estimated.

Registration Fee	$	6,905
FINRA filing fee		(1)
Printing Costs for registration statement, prospectus and related documents		(1)
Accounting Fees and Expenses		(1)
Legal Fees and Expenses		(1)
Rating Agencies’ Fees		(1)
Miscellaneous		(1)
Total		(1)

(1)

These fees are calculated based on the securities offered and the number of issuances and accordingly cannot be estimated at this time. An estimate of the aggregate expenses in connection with the sale and distribution of securities being offered will be included in the applicable prospectus supplement.

ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

Section 145 of the Delaware General Corporation Law (“DGCL”) authorizes a corporation’s board of directors to grant, and authorizes a court to award, indemnity to officers, directors and other corporate agents.

Our certificate of incorporation contains provisions that limit the liability of our directors for monetary damages to the fullest extent permitted by the DGCL. Consequently, our directors will not be personally liable to us or our stockholders for monetary damages for any breach of fiduciary duties as directors, except liability for the following:

•

any breach of their duty of loyalty to us or our stockholders;

•

any act or omission not in good faith or that involves intentional misconduct or a knowing violation of law;

•

unlawful payments of dividends or unlawful stock repurchases or redemptions as provided in Section 174 of the DGCL; or

•

any transaction from which they derived an improper personal benefit.

Any amendment, repeal or elimination of these provisions will not eliminate or reduce the effect of these provisions in respect of any act, omission or claim that occurred or arose prior to that amendment, repeal or elimination. If the DGCL is amended to provide for further limitations on the personal liability of directors of corporations, then the personal liability of our directors will be further limited to the greatest extent permitted by the DGCL.

In addition, our bylaws provide that we will indemnify our directors and officers, and may indemnify our employees, agents and any other persons, to the fullest extent permitted by the DGCL. Our bylaws also provide that we must advance expenses incurred by or on behalf of a director or officer in advance of the final disposition of any action or proceeding, subject to limited exceptions.

Further, we have entered into indemnification agreements with each of our directors and executive officers that may be broader than the specific indemnification provisions contained in the DGCL. These indemnification agreements require us to, among other things, indemnify our directors and executive officers against liabilities that may arise by reason of their status or service. These indemnification agreements also

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generally require us to advance all expenses reasonably and actually incurred by our directors and executive officers in investigating or defending any such action, suit or proceeding. We believe that these agreements are necessary to attract and retain qualified individuals to serve as directors and executive officers.

The limitation of liability and indemnification provisions in our certificate of incorporation, bylaws and indemnification agreements may discourage stockholders from bringing a lawsuit against our directors and officers for breach of their fiduciary duties. They may also reduce the likelihood of derivative litigation against our directors and officers, even though an action, if successful, might benefit us and other stockholders. Further, a stockholder’s investment may be adversely affected to the extent that we pay the costs of settlement and damage awards against our directors and officers as required by these indemnification provisions.

We have obtained insurance policies under which, subject to the limitations of the policies, coverage is provided to our directors and officers against loss arising from claims made by reason of breach of fiduciary duty or other wrongful acts as a director or officer, including claims relating to public securities matters, and to us with respect to payments that may be made by us to our directors and officers pursuant to our indemnification obligations or otherwise as a matter of law.

The underwriting agreement to be filed as Exhibit 1.1 to this registration statement may provide for indemnification by the underwriters of us and our directors and officers for certain liabilities arising under the Securities Act, or the Exchange Act, or otherwise.

ITEM 16. EXHIBITS.

The Exhibits to this registration statement are listed in the Exhibit Index on page II-4 and are incorporated by reference in this prospectus.

ITEM 17. UNDERTAKINGS.

The undersigned Registrant hereby undertakes:

(1) to file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:

(i) to include any prospectus required by Section 10(a)(3) of the Securities Act;

(ii) to reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20% change in the maximum aggregate offering price set forth in the “Calculation of Filing Fee Tables” or “Calculation of Registration Fee” table, as applicable, in the effective registration statement; and

(iii) to include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement;

provided, however, that paragraphs (a)(1)(i), (a)(1)(ii) and (a)(1)(iii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by the registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement.

(2) that, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(3) to remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering.

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(4) that, for the purpose of determining liability under the Securities Act to any purchaser:

(i) each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and (ii) each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5), or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii) or (x) for the purpose of providing the information required by Section 10(a) of the Securities Act shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. Provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such effective date.

(5) that, for the purpose of determining liability of the registrant under the Securities Act to any purchaser in the initial distribution of the securities, the undersigned registrant undertakes that in a primary offering of securities of the undersigned registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

(i) any preliminary prospectus or prospectus of the undersigned registrant relating to the offering required to be filed pursuant to Rule 424;

(ii) any free writing prospectus relating to the offering prepared by or on behalf of the undersigned registrant or used or referred to by the undersigned registrant;

(iii) the portion of any other free writing prospectus relating to the offering containing material information about the undersigned registrant or its securities provided by or on behalf of the undersigned registrant; and

(iv) any other communication that is an offer in the offering made by the undersigned registrant to the purchaser.

(6) that, for purposes of determining any liability under the Securities Act, each filing of the registrant’s annual report pursuant to Section 13(a) or 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the registrant pursuant to the foregoing provisions, or otherwise, the registrant has been advised that in the opinion of the Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the registrant of expenses incurred or paid by a director, officer or controlling person of the registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

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EXHIBIT INDEX

Incorporation by Reference

Exhibit
Number

Exhibit Description

Form

File Number

Exhibit
Number

Filing Date

Filed
Herewith

1.1*

Form of Underwriting Agreement

3.1

Second Amended and Restated Certificate of Incorporation

8-K

001-38685

3.1

March 9,
2020

3.2

Amended and Restated Bylaws

8-K

001-38685

3.1

February 27,
2026

4.1

Specimen Common Stock Certificate

8-K

001-38685

4.1

March 9,
2020

4.2

Amended and Restated Registration Rights Agreement, dated as of March 5, 2020, by and among the Company and certain security holders

10-Q

001-38685

10.17

May 11,
2020

5.1

Opinion of Willkie Farr & Gallagher LLP

S-3ASR

333-283149

5.1

November 12,
2024

23.1

Consent of Independent Registered Public Accounting Firm

23.2

Consent of Willkie Farr & Gallagher LLP (included in the opinion filed as Exhibit 5.1 to this registration statement)

S-3ASR

333-283149

23.2

November 12,
2024

24.1

Power of Attorney (included on the signature page to this registration statement)

S-3ASR

333-283149

24.1

November 12,
2024

107

Filing Fee Table

To be filed by amendment or as an exhibit to a Form 8-K and incorporated by reference herein.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Post-Effective Amendment No. 1 to the Registration Statement on Form S-3 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of San Ramon, California, on July 30, 2026.

GRID DYNAMICS HOLDINGS, INC.

By:

/s/ Leonard Livschitz

Name: Leonard Livschitz
Title: Chief Executive Officer

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the dates indicated.

Signature	Title	Date
/s/ Leonard Livschitz Leonard Livschitz	Chief Executive Officer and Director (Principal Executive Officer)	July 30, 2026
/s/ Anil Doradla Anil Doradla	Chief Financial Officer (Principal Financial and Accounting Officer)	July 30, 2026
* Lloyd Carney	Chairman of the Board and Director	July 30, 2026
* Eric Benhamou	Director	July 30, 2026
* Marina Levinson	Director	July 30, 2026
* Patrick Nicolet	Director	July 30, 2026
* Michael Southworth	Director	July 30, 2026
* Weihang Wang	Director	July 30, 2026

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Signature	Title	Date
* Yueou Wang	Director	July 30, 2026
* Shuo Zhang	Director	July 30, 2026
*By: /s/ Anil Doradla Anil Doradla Attorney in Fact		July 30, 2026

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