As of November 1, 2026, Calumet, Inc. is a publicly traded company (Nasdaq: CLMT). The largest holder reporting an active stake on Schedule 13D is The Heritage Group, at 16.56%. No bankruptcy or receivership appears in its SEC Form 8-K filings. Passive holders reporting on Schedule 13G include Two Seas Capital LP (7.5%), BlackRock (5.4%) (Schedule 13D/A, June 5, 2026).
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Is Calumet, Inc. a real, registered company?
- Calumet, Inc. files with the SEC under CIK 2013745 (its SEC filings).
- Its shares are listed under the ticker CLMT on Nasdaq (SEC company record).
- business address in Indianapolis, Indiana, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under Calumet, Inc. in our court records and SEC 8-K records (as of 2026-11-01).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Two Seas Capital LP (filed 2026-08-14).
Who are Calumet, Inc.'s owners and officers?
Calumet, Inc.: business address in Indianapolis, Indiana; industry Petroleum Refining (Schedule 13G/A, 2026-08-14).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-08-14 | Two Seas Capital LP | 7.5% |
| Schedule 13G/A, 2026-08-14 | Wasserstein Management L.P. | 4.6% |
| Schedule 13D/A, 2026-06-05 | The Heritage Group | 16.56% |
| Schedule 13G/A, 2026-04-02 | Adams Asset Advisors, LLC | 4.7% |
| Schedule 13G/A, 2026-03-26 | The Vanguard Group | 0% |
| Schedule 13G/A, 2026-02-17 | Two Seas Capital LP | 9.3% |
| Schedule 13G/A, 2025-11-14 | Two Seas Capital LP | 7.8% |
| Schedule 13G, 2025-08-13 | Two Seas Capital LP | 5.2% |
| Schedule 13G, 2025-07-29 | The Vanguard Group | 5.38% |
| Schedule 13G, 2025-07-17 | Blackrock, Inc. | 5.4% |
Questions about who owns Calumet, Inc.
Who owns Calumet, Inc.?
On this page, 3 holders' latest ownership filings report 5% or more of Calumet, Inc.: The Heritage Group (16.56%, Schedule 13D/A, filed 2026-06-05), Two Seas Capital LP (7.5%, Schedule 13G/A, filed 2026-08-14) and Blackrock, Inc. (5.4%, Schedule 13G, filed 2025-07-17).
Who are the largest shareholders of Calumet, Inc.?
By the share each holder's latest filing reports, the largest holders of Calumet, Inc. on this page are The Heritage Group (16.56%), Two Seas Capital LP (7.5%) and Blackrock, Inc. (5.4%).
When did The Heritage Group buy into Calumet, Inc.?
The filings give report dates, not purchase dates. The earliest filing from The Heritage Group on this page is the Schedule 13D/A, filed 2026-06-05, reporting 16.56%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 10 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Which insiders own Calumet, Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- Heritage Group, a 10% owner: 13,323,185 shares (15.2% of shares outstanding), 12,440,211 held directly and 882,974 indirectly (Form 4, 2026-06-05).
- , a director: 943,438 shares (1.1% of shares outstanding) (Form 4, 2025-12-05).
- , the executive vice president - montana renewables: 615,201 shares (0.70% of shares outstanding) (Form 4, 2026-09-28).
- , a director: 394,632 shares (0.45% of shares outstanding) (Form 4, 2025-01-21).
- , a director: 348,410 shares (0.40% of shares outstanding) (Form 4, 2026-09-28).
Shares outstanding: 87,898,234 as of 2026-08-07, from the company's latest SEC cover page.
How much has Calumet, Inc. raised?
No fundraising or offering filing from Calumet, Inc. is on file with us.
Keep reading
More on Calumet, Inc. and the records around it.
Calumet, Inc. elsewhere on the record
- 5%+ stake filings Aug 2026
Companies that share a holder
- Two Seas Capital LP also filed stake reports on 14 other companies: NEKTAR THERAPEUTICS (Sep 2026), Quantum Corporation (Aug 2026), Sable Offshore Corp. (Aug 2026)
- BlackRock, Inc. also filed stake reports on 1596 other companies: AvePoint, Inc. (Nov 2026), BIOMARIN PHARMACEUTICAL INC (Nov 2026), MSG RANGERS CORP (Nov 2026)
- The Vanguard Group also filed stake reports on 2384 other companies: BellRing Brands, Inc. (Sep 2026), CAL-MAINE FOODS INC (Sep 2026), FTAI Aviation Ltd. (Sep 2026)
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