As of November 6, 2026, Cerus Corp. is a publicly traded company (Nasdaq: CERS); its largest reported holder is ARK Invest, with 8.95% on Schedule 13G/A of August 14, 2026, then Julian C. Baker (6.8%). The largest insider holding is Greenman William Mariner, the chief executive and president, with 5,053,036 shares (2.5% of shares outstanding), per Form 4 of July 2, 2026 (Schedule 13G/A, August 14, 2026).
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Is Cerus Corp. a real, registered company?
- Cerus Corp files with the SEC under CIK 1020214 (its SEC filings).
- Its shares are listed under the ticker CERS on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Concord, California, 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 CERUS CORP in our court records and SEC 8-K records (as of 2026-11-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names ARK Invest (filed 2026-08-14).
Who are Cerus Corp.'s owners and officers?
Cerus Corp.: incorporated in Delaware; business address in Concord, California; industry Surgical & Medical Instruments & Apparatus (Schedule 13G/A, 2026-08-14).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-08-14 | Ark Investment Management LLC | 8.95% |
| Schedule 13G/A, 2026-08-14 | Baker Bros. Advisors LP | 3.2% |
| Schedule 13G/A, 2026-08-13 | Soleus Capital Master Fund, L.P. | 1.2% |
| Schedule 13G/A, 2026-03-26 | The Vanguard Group | 0% |
| Schedule 13G, 2026-03-24 | Soleus Capital Master Fund, L.P. | 5.1% |
| Schedule 13G/A, 2025-11-14 | Baker Bros. Advisors LP | 5.2% |
| Schedule 13G/A, 2025-08-14 | Julian C. Baker | 6.8% |
| Schedule 13G/A, 2025-07-30 | Ark Investment Management LLC | 10.05% |
Questions about who owns Cerus Corp.
Who owns Cerus Corp.?
On this page, 2 holders' latest ownership filings report 5% or more of Cerus Corp.: Ark Investment Management LLC (8.95%, Schedule 13G/A, filed 2026-08-14) and Julian C. Baker (6.8%, Schedule 13G/A, filed 2025-08-14).
Who are the largest shareholders of Cerus Corp.?
By the share each holder's latest filing reports, the largest holders of Cerus Corp. on this page are Ark Investment Management LLC (8.95%) and Julian C. Baker (6.8%).
When did Ark Investment Management LLC buy into Cerus Corp.?
The filings give report dates, not purchase dates. The earliest filing from Ark Investment Management LLC on this page is the Schedule 13G/A, filed 2025-07-30, reporting 10.05%; its latest, Schedule 13G/A filed 2026-08-14, reports 8.95%. 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%); 8 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 Cerus Corp. 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 Cerus Corp. 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.
- , the chief executive and president: 5,053,036 shares (2.5% of shares outstanding) (Form 4, 2026-07-02).
- , the chief executive: 2,232,211 shares (1.1% of shares outstanding) (Form 4, 2026-07-20).
- , the chief financial officer: 1,062,188 shares (0.53% of shares outstanding) (Form 4, 2026-07-02).
- , the chief legal officer: 936,657 shares (0.46% of shares outstanding) (Form 4, 2026-08-17).
- , the chief medical officer: 777,361 shares (0.38% of shares outstanding) (Form 4, 2026-03-16).
Shares outstanding: 201,954,184 as of 2026-10-16, from the company's latest SEC cover page.
How much has Cerus Corp. raised?
No fundraising or offering filing from Cerus Corp. is on file with us.
Keep reading
More on Cerus Corp. and the records around it.
Cerus Corp. elsewhere on the record
- 5%+ stake filings Aug 2026
Companies that share a holder
- ARK Investment Management LLC also filed stake reports on 20 other companies: Tempus AI, Inc. (Nov 2026), 10x Genomics, Inc. (Oct 2026), Twist Bioscience Corp (Sep 2026)
- Soleus Capital Master Fund, L.P. also filed stake reports on 24 other companies: Beta Bionics, Inc. (Nov 2026), Evolus, Inc (Nov 2026), INSPIRE MEDICAL SYSTEMS, INC. (Nov 2026)
- Baker Bros. Advisors LP also filed stake reports on 25 other companies: Madrigal Pharmaceuticals, Inc. (Nov 2026), Kodiak Sciences Inc. (Sep 2026), BeOne Medicines Ltd. (Sep 2026)
Related pages
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https://mentionfox.com/who-owns/cerus