As of November 6, 2026, Equillium, Inc. is a publicly traded company (Nasdaq: EQ); its largest reported holder is Janus Henderson, with 9.99% on Schedule 13G/A of February 6, 2026, then ADAR1 Capital (9.9%). The largest insider holding is Stephen Connelly, the president and cso, with 762,025 shares (1.2% of shares outstanding), per Form 4 of June 5, 2026 (Schedule 13G/A, February 6, 2026).
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Is Equillium, Inc. a real, registered company?
- Equillium, Inc. files with the SEC under CIK 1746466 (its SEC filings).
- Its shares are listed under the ticker EQ on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in La Jolla, 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 Equillium, Inc. 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 Aberdeen Group plc (filed 2026-11-04).
Who are Equillium, Inc.'s owners and officers?
Equillium, Inc.: incorporated in Delaware; business address in La Jolla, California; industry Pharmaceutical Preparations (Schedule 13G/A, 2026-11-04).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-11-04 | Aberdeen Group PLC | 7.03% |
| Schedule 13G, 2026-08-13 | Affinity Asset Advisors, LLC | 6.5% |
| Schedule 13G/A, 2026-08-12 | Adage Capital Management, L.P. | 7.25% |
| Schedule 13G/A, 2026-05-15 | Adar1 Capital Management, LLC | 9.9% |
| Schedule 13G/A, 2026-05-15 | Xiangmin Cui | 8.9% |
| Schedule 13G, 2026-05-07 | Aberdeen Group PLC | 5.3% |
| Schedule 13G, 2026-03-20 | Ra Capital Management, L.P. | 9.9% |
| Schedule 13G/A, 2026-02-06 | Janus Henderson Group PLC | 9.99% |
| Schedule 13G, 2025-12-08 | Janus Henderson Group PLC | 9.99% |
| Schedule 13G, 2025-11-14 | Woodline Partners LP | 5.9% |
| Schedule 13G, 2025-11-14 | Adar1 Capital Management, LLC | 9.9% |
| Schedule 13G, 2025-11-13 | Adage Capital Management, L.P. | 9.99% |
Questions about who owns Equillium, Inc.
Who owns Equillium, Inc.?
On this page, 8 holders' latest ownership filings report 5% or more of Equillium, Inc.: Janus Henderson Group PLC (9.99%, Schedule 13G/A, filed 2026-02-06), Adar1 Capital Management, LLC (9.9%, Schedule 13G/A, filed 2026-05-15), Ra Capital Management, L.P. (9.9%, Schedule 13G, filed 2026-03-20), Xiangmin Cui (8.9%, Schedule 13G/A, filed 2026-05-15) and Adage Capital Management, L.P. (7.25%, Schedule 13G/A, filed 2026-08-12); 3 more are listed above.
Who are the largest shareholders of Equillium, Inc.?
By the share each holder's latest filing reports, the largest holders of Equillium, Inc. on this page are Janus Henderson Group PLC (9.99%), Adar1 Capital Management, LLC (9.9%) and Ra Capital Management, L.P. (9.9%).
When did Janus Henderson Group PLC buy into Equillium, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Janus Henderson Group PLC on this page is the Schedule 13G, filed 2025-12-08, reporting 9.99%; its latest, Schedule 13G/A filed 2026-02-06, reports 9.99%.
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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Which insiders own Equillium, 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.
- , the president and cso: 762,025 shares (1.2% of shares outstanding) (Form 4, 2026-06-05).
- , the chief financial officer: 126,633 shares (0.20% of shares outstanding), 88,913 held directly and 37,720 indirectly (Form 4, 2025-01-24).
- , the president and chief operating officer: 62,586 shares (0.10% of shares outstanding) (Form 4, 2026-06-05).
Shares outstanding: 63,408,082 as of 2026-08-07, from the company's latest SEC cover page.
How much has Equillium, Inc. raised?
No fundraising or offering filing from Equillium, Inc. is on file with us.
Keep reading
More on Equillium, Inc. and the records around it.
Equillium, Inc. elsewhere on the record
- 5%+ stake filings Nov 2026
Companies that share a holder
- Aberdeen Group plc also filed stake reports on 12 other companies: IMMUNIC, INC (Nov 2026), CODEXIS, INC. (Oct 2026), Corbus Pharmaceuticals Holdings, Inc. (Oct 2026)
- Affinity Asset Advisors, LLC also filed stake reports on 13 other companies: Amanat Acquisition Corp. (Aug 2026), Avalo Therapeutics, Inc. (Aug 2026), First Tracks Biotherapeutics, Inc (Aug 2026)
- Woodline Partners LP also filed stake reports on 19 other companies: Biohaven Ltd. (Aug 2026), Black Rock Coffee Bar, Inc. (Aug 2026), CalciMedica, Inc. (Aug 2026)
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