SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 1)

Calumet, Inc.

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

131428104

(CUSIP Number)

Amy Schumacher
6640 Intech Blvd, Suite 200,
Indianapolis, IN, 46278
(317) 872-6010

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

06/05/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. Checkbox not checked

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

SCHEDULE 13D

CUSIP Number(s):

131428104

Name of reporting person

The Heritage Group

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

INDIANA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 13,640,211.00
8	Shared Voting Power 882,974.00
9	Sole Dispositive Power 13,640,211.00
10	Shared Dispositive Power 882,974.00

Aggregate amount beneficially owned by each reporting person

14,523,185.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

16.56 %

Type of Reporting Person (See Instructions)

HC, PN

Comment for Type of Reporting Person:

The reported percentage is calculated based on 87,686,561 shares of the Issuer's Common Stock, par value $0.01 per share ("Common Stock") outstanding as of June 2, 2026, based on information provided by the Issuer.

SCHEDULE 13D

Item 1.

Security and Issuer

(a)

Title of Class of Securities:

Common Stock, par value $0.01 per share

(b)

Name of Issuer:

Calumet, Inc.

(c)

Address of Issuer's Principal Executive Offices:

1060 N Capitol Ave, Suite 6-401, Indianapolis, INDIANA , 46204.

Item 1 Comment:

This Statement constitutes Amendment No. 1 ("Amendment No. 1") to the Schedule 13D filed by the Reporting Person with the Securities and Exchange Commission (the "SEC") on July 11, 2024 (the "2024 Schedule 13D" and, as hereby amended, the "Schedule 13D"). Except as specifically provided herein, this Amendment No. 1 does not modify any of the information previously reported in the 2024 Schedule 13D. Capitalized terms used but not defined in this Amendment No. 1 shall maintain the meanings herein as are ascribed to such terms in the 2024 Schedule 13D.

Item 2.

Identity and Background

(a)

Item 2(a)-(f) of the 2024 Schedule 13D are each hereby amended and restated in their entirety as follows and as set forth in subsections (b), (c), (d), (e) and (f) hereof: This Statement on Schedule 13D is filed by The Heritage Group, an Indiana general partnership (the "Reporting Person"). Twenty-eight grantor trusts (the "General Partner Trusts") directly own all of the outstanding general partner interests in the Reporting Person. The direct or indirect beneficiaries of the General Partner Trusts are members of the Fehsenfeld family. Each of the General Partner Trusts has seven trustees (the "General Partner Trustees"), each of whom exercises equivalent voting rights with respect to each such General Partner Trust. Certain information regarding each of the General Partner Trusts and each of the General Partner Trustees is set forth in Exhibit A filed with this Schedule 13D and incorporated herein by this reference.

(b)

The principal business address of the Reporting Person is 6640 Intech Blvd, Suite 200, Indianapolis, IN 46278. The principal business addresses of each of the General Partner Trusts and each of the General Partner Trustees are set forth in Exhibit A filed with this Schedule 13D and incorporated herein by this reference.

(c)

The principal business of the Reporting Person is the management of a diverse set of companies involved in the highway construction, environmental services and oil refining and marketing industries. The principal occupation or employment of each of the General Partner Trustees is provided in Exhibit A filed with this Schedule 13D and incorporated herein by reference.

(d)

(e)

During the last five years, the Reporting Person has not been, and, to the best knowledge of the Reporting Person, none of the General Partner Trusts or General Partner Trustees have been, party to a civil proceeding of a judicial or administrative body of competent jurisdiction and, as a result of such proceeding, was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

(f)

The Reporting Person and each of the General Partner Trusts are formed under the laws of the State of Indiana. Each of the General Partner Trustees are citizens of the United States of America.

Item 4.

Purpose of Transaction

Item 4 of the 2024 Schedule 13D is hereby amended to incorporate the following at the end thereof: As previously reported and in connection with the July 2024 restructuring, the Reporting Person received warrants to acquire 1,020,000 shares of Common Stock at an exercise price of $20.00 per share (the "Heritage Warrants"). On May 15, 2026, the Reporting Person exercised the Heritage Warrants in full, receiving 393,002 shares of Common Stock in net settlement thereof resulting in a decrease in beneficial ownership of 626,998 shares of Common Stock. On June 5, 2026, the General Partner Trustees approved a gift of 540,000 shares of Common Stock (the "Gift") directly held by the Reporting Person.

Item 5.

Interest in Securities of the Issuer

(a)

Item 5(a)-(c) of the 2024 Schedule 13D are each hereby amended and restated in their entirety as follows and as set forth in subsections (b) and (c) hereof: The responses of the Reporting Person set forth in rows (11) and (13) of the cover page of this Amendment No. 1 are incorporated by reference into this Item 5(a). The Reporting Person beneficially owns an aggregate of 14,523,185 shares of Common Stock, representing 16.56% of the 87,686,561 shares of Common Stock outstanding as of June 2, 2026, based on information provided by the Issuer. In this regard, the Reporting Person directly holds 12,440,211 shares of Common Stock with sole voting and dispositive power. The Reporting Person serves as the Manager of The Heritage Group Investment Company, LLC, an Indiana manager-managed limited liability company ("Investment LLC"), and may be deemed to indirectly beneficially own 1,200,000 shares of Common Stock directly held by Investment LLC. In that capacity, the Reporting Person has sole voting and dispositive power over the Common Stock directly held by Investment LLC. The Reporting Person also may be deemed to indirectly beneficially own certain shares of Common Stock directly held by Lumet Investments, Inc. (f/k/a Calumet, Incorporated), an Indiana corporation ("Lumet Investments"), in which the Reporting Person has an indirect interest through Asphalt Materials, Inc. ("AMI"). The Reporting Person does not control AMI and therefore disclaims beneficial ownership of shares of Common Stock directly held by Lumet Investments, but has reflected in shared voting and dispositive power on this Statement the 882,974 shares of Common Stock representing the Reporting Person's proportionate interest therein. Pursuant to Rule 13d-4 of the Act, the Reporting Person declares that filing this statement shall not be deemed an admission that the Reporting Person, or any of the General Partner Trusts or General Partner Trustees, is a beneficial owner of the reported securities, for purposes of Section 13(d) and/or Section 13(g) or for any other purpose. Each of the General Partner Trusts and the General Partner Trustees disclaim beneficial ownership of the reported securities.

(b)

The responses of the Reporting Person set forth in rows (7) through (10) of the cover page of this Amendment No. 1 and the information set forth in Item 5(a) hereof are incorporated by reference into this Item 5(b).

(c)

Within the prior 60 days the Reporting Person has engaged in the following transactions: Date Trade Type Amount of Common Stock Price 05/15/2026 Disposition to Issuer pursuant to net settlement of the Heritage Warrants 626,998 $32.536 06/05/2026 Gift of Common Stock 540,000 $0

Item 7.

Material to be Filed as Exhibits.

Exhibit A of this Item 7 of the 2024 Schedule 13D is hereby amended and restated as follows: A. The Heritage Group General Partner Trusts and General Partner Trustees (filed herewith).

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

The Heritage Group

Signature:	/s/ Amy Schumacher
Name/Title:	Amy Schumacher, Chief Executive Officer
Date:	06/05/2026

Amendment: SEC Form SCHEDULE 13D/A filed by Calumet Inc.