Equillium, Inc. (EQ) Ownership
EQ ownership summary
as of October 17, 2026- Institutions
- 65.8% of shares outstanding
- Insiders
- 16.00% of shares outstanding
- Shares outstanding
- 63.4M
- Float
- 37.0M shares available to trade
- Short interest
- 10.13% 5.5M shares short
- Days to cover
- 8.51 short interest up 0.7% vs prior month
- Institutions 65.76%
- Insiders 16.00%
- Other investors 18.25%
EQ top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | HHG PLC | 10.24% | 6.5M | $7.7M | +632,359 (+10.8%) | March 31, 2026 |
| 2 | Jupiter Topco LLC | 10.24% | 6.5M | $7.7M | +6.5M (0.0%) | June 30, 2026 |
| 3 | Decheng Capital LLC | 7.01% | 4.4M | $5.3M | — | June 30, 2026 |
| 4 | Affinity Asset Advisors, LLC | 6.47% | 4.1M | $4.9M | +2.9M (+234.3%) | June 30, 2026 |
| 5 | ADAR1 Capital Management LLC | 5.93% | 3.8M | $4.5M | +31,910 (+0.9%) | June 30, 2026 |
| 6 | Aberdeen Group PLC | 5.73% | 3.6M | $4.3M | +278,822 (+8.3%) | June 30, 2026 |
| 7 | Woodline Partners LP | 5.52% | 3.5M | $4.2M | — | June 30, 2026 |
| 8 | RA Capital Management, LLC | 4.88% | 3.1M | $3.7M | — | June 30, 2026 |
| 9 | StemPoint Capital LP | 3.18% | 2.0M | $2.4M | +2.0M (0.0%) | June 30, 2026 |
| 10 | Vanguard Capital Management, LLC | 2.87% | 1.8M | $2.2M | +38,340 (+2.1%) | June 30, 2026 |
| 11 | Eversept Partners, LP | 2.40% | 1.5M | $1.8M | +21,831 (+1.5%) | June 30, 2026 |
| 12 | Adage Capital Partners Gp LLC | 2.19% | 1.4M | $1.7M | −3.9M (−73.9%) | June 30, 2026 |
| 13 | Renaissance Technologies Corp | 1.01% | 638K | $758,764 | −19,347 (−2.9%) | June 30, 2026 |
| 14 | Exome Asset Management LLC | 0.87% | 553K | $658,018 | +552,956 (0.0%) | June 30, 2026 |
| 15 | DG Capital Management, LLC | 0.73% | 463K | $551,441 | +463,396 (0.0%) | June 30, 2026 |
| 16 | Diadema Partners LP | 0.63% | 400K | $476,336 | −33,562 (−7.7%) | June 30, 2026 |
| 17 | Geode Capital Management, LLC | 0.60% | 381K | $453,598 | +2,362 (+0.6%) | June 30, 2026 |
| 18 | Balyasny Asset Management LLC | 0.54% | 344K | $409,847 | −1.3M (−79.0%) | June 30, 2026 |
| 19 | Tudor Investment Corp Et AL | 0.50% | 320K | $380,919 | +300,000 (+1,492.5%) | June 30, 2026 |
| 20 | Ikarian Capital, LLC | 0.48% | 304K | $361,230 | — | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 12 holders added 13.7M shares and 4 cut 5.3M.
EQ top mutual fund and ETF holders
17 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | abrdn Life Sciences Investors | 5.85% | 3.7M | $4.4M | +643,110 (+21.0%) | August 31, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 2.21% | 1.4M | $1.7M | — | August 31, 2026 |
| 3 | Fidelity Extended Market Index | 0.26% | 162K | $192,757 | −870 (−0.5%) | August 31, 2026 |
| 4 | iShares Micro-Cap ETF | 0.23% | 147K | $174,920 | −1,014 (−0.7%) | September 30, 2026 |
| 5 | Avantis US Small Cap Equity ETF | 0.12% | 75K | $89,739 | — | September 30, 2026 |
| 6 | Fidelity Total Market Index | 0.09% | 56K | $67,033 | +1,653 (+3.0%) | August 31, 2026 |
| 7 | Invesco NASDAQ Future Gen 200 ETF | 0.08% | 53K | $62,502 | — | September 30, 2026 |
| 8 | Fidelity Series Total Market Index | 0.08% | 52K | $61,392 | +4,125 (+8.7%) | August 31, 2026 |
| 9 | Fidelity Nasdaq Composite Index | 0.04% | 27K | $32,437 | −9,425 (−25.7%) | August 31, 2026 |
| 10 | China Universal Gbl YLBJ QDII CNH | 0.04% | 25K | $29,750 | +25,000 (0.0%) | June 30, 2026 |
| 11 | Vanguard Balanced Index Inv | 0.04% | 25K | $29,735 | — | August 31, 2026 |
| 12 | Vanguard MStar Inst Ttl StkMktIdxInstlPl | 0.04% | 22K | $26,775 | — | August 31, 2026 |
| 13 | 1290 VT Micro Cap K | 0.02% | 9,860 | $11,733 | — | August 31, 2026 |
| 14 | DFA US Micro Cap I | 0.01% | 7,668 | $9,125 | — | August 31, 2026 |
| 15 | Vanguard U.S. Eq Idx £ Acc | 0.01% | 5,826 | $6,933 | — | August 31, 2026 |
| 16 | Victory Extended Market Index | 0.01% | 5,565 | $6,622 | +5,565 (0.0%) | June 30, 2026 |
| 17 | JHVIT Total Stock Market Index I | <0.01% | 1,161 | $1,382 | +1,161 (0.0%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
EQ insider transactions
latest 8| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-13 | Christine Zedelmayer | Sell | $2.50 | 120,312 | $300,780 |
| 2026-03-09 | Christine Zedelmayer | Sell | $2.00 | 181,219 | $362,438 |
| 2026-02-19 | Christine Zedelmayer | Sell | $1.76 | 185,937 | $327,249 |
| 2026-01-08 | Penny Tom | Sell | $1.29 | 6,533 | $8,428 |
| 2025-12-23 | Christine Zedelmayer | Sell | $1.50 | 100,000 | $150,000 |
| 2025-12-15 | Christine Zedelmayer | Sell | $1.31 | 11,900 | $15,589 |
| 2025-12-12 | Christine Zedelmayer | Sell | $1.34 | 23,804 | $31,897 |
| 2025-11-25 | Christine Zedelmayer | Sell | $0.95 | 8,098 | $7,693 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
EQ shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns EQ
Institutional investors own 65.8% of Equillium's shares and insiders 16.00%. The largest holder is HHG PLC with 10.24% of the shares (6.5M), as of March 31, 2026. Among the top 20 institutions, 12 added shares and 4 reduced their stake in the latest filings. Short interest is 10.13% of the float, or 8.51 days of average trading volume. The share count rose 686.7% since 2017.
Related: EQ analyst forecast, EQ key metrics. See the EQ stock overview for the latest quote and news.
EQ ownership FAQ
Who owns the most Equillium stock?
The largest shareholders of Equillium are HHG PLC (10.24%), Jupiter Topco LLC (10.24%), Decheng Capital LLC (7.01%), Affinity Asset Advisors, LLC (6.47%), ADAR1 Capital Management LLC (5.93%).
What percentage of Equillium is owned by institutions?
Institutions hold 65.8% of Equillium's shares outstanding; insiders hold 16.00%.
Which funds own Equillium?
The largest fund holders of Equillium are abrdn Life Sciences Investors (5.85%), Vanguard MStar Total Stk Mkt Idx Invest (2.21%), Fidelity Extended Market Index (0.26%), iShares Micro-Cap ETF (0.23%), Avantis US Small Cap Equity ETF (0.12%).
What is Equillium's short interest?
5.5M shares of Equillium were sold short, 10.13% of the float; at the average daily volume it would take 8.51 days to cover.
Are insiders buying or selling Equillium?
Of the latest 8 reported insider transactions in Equillium (since November 25, 2025), 0 were purchases and 8 were sales.
How many shares of Equillium are outstanding?
Equillium has 63.4M shares outstanding, of which 37.0M are in the public float.