Calumet, Inc.
Ownership
Ownership Structure
Who owns Calumet, Inc. (CLMT)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 67.2% of the shares are freely tradable; institutional investors hold 53.3%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Two Seas Capital LP | 6.78 | 5,960,292 | -14.6 | 03/31/2026 |
| BlackRock Inc | 5.67 | 4,980,528 | +0.8 | 03/31/2026 |
| Wasserstein Debt Opportunities Management LP | 4.51 | 3,964,893 | -13.3 | 06/30/2026 |
| Vanguard Capital Management, LLC | 3.91 | 3,435,394 | +0.0 | 03/31/2026 |
| State Street Corp | 3.50 | 3,080,159 | +42.9 | 03/31/2026 |
| Adams Asset Advisors LLC | 2.28 | 2,006,206 | -37.3 | 06/30/2026 |
| Geode Capital Management, LLC | 2.13 | 1,872,859 | +12.9 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 3.00 | 2,639,258 | +0.4 | 07/31/2026 |
| SttStrtSPDRS&POil&GasExplor&ProdtnETF | 2.30 | 2,023,538 | -0.5 | 08/31/2026 |
| iShares Russell 2000 ETF | 2.02 | 1,774,700 | -0.6 | 08/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Mawer Stephen P | Director | 311,578 | 18,414,260 $ | Jul 9, 2026 | direct |
| Schumacher Amy M | Director | 258,160 | 15,257,256 $ | Jul 9, 2026 | direct |
| Sajkowski Daniel J | Director | 81,958 | 4,843,718 $ | Jul 9, 2026 | direct |
| Boss John G. | Director | 33,033 | 1,952,250 $ | Jul 9, 2026 | direct |
| Raymond Paul C | Director | 28,973 | 1,712,304 $ | Jul 9, 2026 | direct |
| Twitchell Karen A. | Director | 13,389 | 791,290 $ | Jul 9, 2026 | direct |
| Quintana Julio M | Director | 7,067 | 417,660 $ | Jul 9, 2026 | direct |
| Narwold Karen G | Director | 7,067 | 417,660 $ | Jul 9, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jul 9, 2026 | Boss John G. | Director | Other | 2,827 | 0.00 | – |
| Jul 9, 2026 | Boss John G. | Director | Other | 7,067 | 0.00 | – |
| Jul 9, 2026 | Mawer Stephen P | Director | Other | 5,512 | 0.00 | – |
| Jul 9, 2026 | Mawer Stephen P | Director | Other | 13,780 | 0.00 | – |
| Jul 9, 2026 | Raymond Paul C | Director | Other | 2,827 | 0.00 | – |
| Jul 9, 2026 | Raymond Paul C | Director | Other | 7,067 | 0.00 | – |
| Jul 9, 2026 | Sajkowski Daniel J | Director | Other | 2,827 | 0.00 | – |
| Jul 9, 2026 | Sajkowski Daniel J | Director | Other | 7,067 | 0.00 | – |
| Jul 9, 2026 | Schumacher Amy M | Director | Other | 7,067 | 0.00 | – |
| Jul 9, 2026 | Quintana Julio M | Director | Other | 7,067 | 0.00 | – |
| Jul 9, 2026 | Narwold Karen G | Director | Other | 7,067 | 0.00 | – |
| Jul 9, 2026 | Twitchell Karen A. | Director | Other | 7,067 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.