As of November 9, 2026, Sempreon, Inc. is a publicly traded company (Nasdaq: CASK). The largest holder reporting an active stake on Schedule 13D is Donn S. Lux, a director and 10% owner, at 31.4%. No bankruptcy or receivership appears in its SEC Form 8-K filings. Founder or officer holdings: Karen Seaberg, a director (9.7%). Passive holders reporting on Schedule 13G include BlackRock (5.2%) (Schedule 13D/A, December 12, 2025).
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Is Sempreon, Inc. a real, registered company?
- Mgp Ingredients Inc files with the SEC under CIK 835011 (its SEC filings).
- Its shares are listed under the ticker CASK on Nasdaq (also MGPI) (SEC company record).
- Incorporated in Kansas; business address in Atchison, Kansas, 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 MGP INGREDIENTS INC in our court records and SEC 8-K records (as of 2026-11-09).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names BlackRock (filed 2026-07-29).
Who are Sempreon, Inc.'s owners and officers?
Sempreon, Inc.: incorporated in Kansas; business address in Atchison, Kansas; industry Wholesale-Beer, Wine & Distilled Alcoholic Beverages (Schedule 13G, 2026-07-29).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G, 2026-07-29 | Blackrock, Inc. | 5.2% |
| Schedule 13G/A, 2026-07-08 | Federated Hermes, Inc. | 4.59% |
| Schedule 13G/A, 2026-04-27 | Blackrock, Inc. | 4.7% |
| Schedule 13G/A, 2026-04-07 | Federated Hermes, Inc. | 5.59% |
| Schedule 13G/A, 2026-03-27 | The Vanguard Group | 0% |
| Schedule 13G/A, 2026-01-08 | Blackrock, Inc. | 5.01% |
| Schedule 13G/A, 2026-01-08 | Federated Hermes, Inc. | 6.75% |
| Schedule 13D/A, 2025-12-12 | Lux Donn S. | 31.4% |
| Schedule 13D/A, 2025-12-11 | Karen Seaberg | 9.7% |
| Schedule 13D/A, 2025-11-21 | Lux Donn S. | 32.8% |
| Schedule 13G, 2025-11-05 | Federated Hermes, Inc. | 5.17% |
| Schedule 13D/A, 2025-08-21 | Karen Seaberg | 11.2% |
Questions about who owns Sempreon, Inc.
Who owns Sempreon, Inc.?
On this page, 3 holders' latest ownership filings report 5% or more of Sempreon, Inc.: Lux Donn S. (31.4%, Schedule 13D/A, filed 2025-12-12), Karen Seaberg (9.7%, Schedule 13D/A, filed 2025-12-11) and Blackrock, Inc. (5.2%, Schedule 13G, filed 2026-07-29).
Who are the largest shareholders of Sempreon, Inc.?
By the share each holder's latest filing reports, the largest holders of Sempreon, Inc. on this page are Lux Donn S. (31.4%), Karen Seaberg (9.7%) and Blackrock, Inc. (5.2%).
When did Lux Donn S. buy into Sempreon, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Lux Donn S. on this page is the Schedule 13D/A, filed 2025-11-21, reporting 32.8%; its latest, Schedule 13D/A filed 2025-12-12, reports 31.4%. 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%); 12 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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What the Full Report on Sempreon, Inc. covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
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Which insiders own Sempreon, 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.
- , a director and 10% owner: 2,438,264 shares (11.4% of shares outstanding), held indirectly through a trusts (Form 4, 2025-05-15).
- , a director: 2,036,017 shares (9.5% of shares outstanding), held indirectly through by Seaberg MGP Holdings (Form 4, 2025-12-10).
- , a 10% owner: 550,458 shares (2.6% of shares outstanding), held indirectly through a trust (Form 4, 2026-08-24).
- , a 10% owner: 470,958 shares (2.2% of shares outstanding), held indirectly through a trust (Form 4, 2026-05-28).
- , the chief executive and president: 107,836 shares (0.50% of shares outstanding) (Form 4, 2026-08-06).
Shares outstanding: 21,421,868 as of 2026-10-23, from the company's latest SEC cover page.
How much has Sempreon, Inc. raised?
No fundraising or offering filing from Sempreon, Inc. is on file with us.
Keep reading
More on Sempreon, Inc. and the records around it.
Sempreon, Inc. elsewhere on the record
- 5%+ stake filings Jul 2026
Companies that share a holder
- Federated Hermes, Inc. also filed stake reports on 13 other companies: EyePoint (Nov 2026), Arcturus Therapeutics Holdings Inc. (Oct 2026), Forte Biosciences, Inc. (Sep 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)
Related pages
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