UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): July 9, 2026

iSpecimen Inc.

(Exact name of registrant as specified in its charter)

Delaware		001-40501		27-0480143
(State or other jurisdiction of Incorporation)		(Commission File Number)		(IRS Employer Identification No.)

8 Cabot Road, Suite 1800
Woburn, MA 01801

(Address of principal executive offices, including zip code)

Registrant’s telephone number, including area code: (781) 301-6700

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading symbol(s)		Name of each exchange on which registered
Common Stock, par value $0.0001 per share		ISPC		The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

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 13(a) of the Exchange Act. ☐

Item 8.01 Other Events.

On July 9, 2026, iSpecimen Inc. (the “Company”) completed Milestone 3 in the Company’s digital transformation program powered by SalesStack Solutions. Pursuant to Section 3.1 of the Definitive Software Purchase and Services Agreement between the Company and Sales Stack Solutions Corp. (the “SalesStack Agreement”), filed as Exhibit 10.46 to the Company’s Registration Statement on Form S-1/A filed on June 11, 2025, the Company made a payment of $700,000 upon completion of Milestone 3. This milestone delivers additional marketplace features, broader geographic rollout, and deeper integrations with partner ecosystems, building upon the system integration and marketplace activation achieved in Milestone 2. The Company previously disclosed the completion of Milestone 1 and Milestone 2 under the SalesStack Agreement on Current Reports on Form 8-K filed on August 21, 2025 and February 6, 2026, respectively.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Dated: July 14, 2026

iSPECIMEN INC.

By:	/s/ Katharyn Field
	Name:	Katharyn Field
	Title:	Chief Executive Officer