Emergent BioSolutions Inc. (EBS) Ownership
EBS ownership summary
as of October 18, 2026- Institutions
- 90.2% of shares outstanding
- Insiders
- 4.21% of shares outstanding
- Shares outstanding
- 51.3M
- Float
- 49.1M shares available to trade
- Short interest
- 18.41% 9.3M shares short
- Days to cover
- 8.24 short interest down 14.3% vs prior month
- Institutions 90.19%
- Insiders 4.21%
- Other investors 5.60%
EBS top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 9.20% | 4.7M | $30.1M | +375,137 (+8.6%) | June 30, 2026 |
| 2 | Dimensional Fund Advisors, Inc. | 6.00% | 3.1M | $19.6M | +319,488 (+11.6%) | June 30, 2026 |
| 3 | State Street Corp | 5.71% | 2.9M | $18.7M | +79,537 (+2.8%) | June 30, 2026 |
| 4 | American Century Companies Inc | 5.40% | 2.8M | $17.7M | +344,726 (+14.2%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 4.29% | 2.2M | $14.0M | −59,156 (−2.6%) | June 30, 2026 |
| 6 | LSV Asset Management | 3.31% | 1.7M | $10.8M | +799,151 (+89.1%) | June 30, 2026 |
| 7 | Acadian Asset Management LLC | 2.62% | 1.3M | $8.6M | −37,301 (−2.7%) | June 30, 2026 |
| 8 | Geode Capital Management, LLC | 2.61% | 1.3M | $8.5M | +64,334 (+5.1%) | June 30, 2026 |
| 9 | Charles Schwab Investment Management Inc | 2.34% | 1.2M | $7.7M | −305,284 (−20.3%) | June 30, 2026 |
| 10 | Oak Hill Advisors LP | 2.17% | 1.1M | $7.1M | — | June 30, 2026 |
| 11 | Millennium Management LLC | 2.09% | 1.1M | $6.8M | +540,184 (+101.5%) | June 30, 2026 |
| 12 | Ancora Advisors LLC | 2.08% | 1.1M | $6.8M | +658,600 (+160.9%) | June 30, 2026 |
| 13 | AQR Capital Management LLC | 2.03% | 1.0M | $6.6M | +51,474 (+5.2%) | June 30, 2026 |
| 14 | The Goldman Sachs Group Inc | 2.02% | 1.0M | $6.6M | +223,861 (+27.6%) | June 30, 2026 |
| 15 | Vanguard Portfolio Management, LLC | 2.01% | 1.0M | $6.6M | −87,907 (−7.9%) | June 30, 2026 |
| 16 | D. E. Shaw & Co LP | 1.76% | 900K | $5.7M | −103,804 (−10.3%) | June 30, 2026 |
| 17 | Federated Hermes Inc | 1.62% | 831K | $5.3M | +374,806 (+82.1%) | June 30, 2026 |
| 18 | Prudential Financial Inc | 1.57% | 806K | $5.1M | +357,080 (+79.6%) | June 30, 2026 |
| 19 | Prescott Group Capital Management LLC | 1.51% | 773K | $4.9M | — | June 30, 2026 |
| 20 | Renaissance Technologies Corp | 1.33% | 683K | $4.4M | +27,200 (+4.1%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 13 holders added 4.2M shares and 5 cut 593K.
EBS top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Avantis US Small Cap Value ETF | 5.71% | 2.9M | $18.7M | +4,632 (+0.2%) | September 30, 2026 |
| 2 | State Street® SPDR® S&P® Biotech ETF | 3.17% | 1.6M | $10.4M | −31,100 (−1.9%) | September 30, 2026 |
| 3 | Vanguard MStar Total Stk Mkt Idx Invest | 3.03% | 1.6M | $9.9M | — | August 31, 2026 |
| 4 | iShares Russell 2000 ETF | 2.71% | 1.4M | $8.9M | −16,000 (−1.1%) | September 30, 2026 |
| 5 | DFA US Small Cap Value I | 1.38% | 706K | $4.5M | — | August 31, 2026 |
| 6 | Federated Hermes MDT Small Cap Core IS | 1.23% | 630K | $4.0M | +314,285 (+99.4%) | June 30, 2026 |
| 7 | Fidelity Small Cap Index | 1.11% | 569K | $3.6M | +4,467 (+0.8%) | July 31, 2026 |
| 8 | iShares U.S. Small-Cap Eq Fac ETF | 1.06% | 546K | $3.5M | — | September 30, 2026 |
| 9 | Fidelity Enhanced Small Cap Core ETF | 1.03% | 530K | $3.4M | +1,110 (+0.2%) | September 30, 2026 |
| 10 | Vanguard Strategic Equity Inv | 1.03% | 529K | $3.4M | +63,248 (+13.6%) | June 30, 2026 |
| 11 | iShares Russell 2000 Value ETF | 0.94% | 484K | $3.1M | +734 (+0.2%) | September 30, 2026 |
| 12 | DFA US Targeted Value I | 0.86% | 443K | $2.8M | — | August 31, 2026 |
| 13 | Schwab Fundamental U.S. Small CompanyETF | 0.79% | 406K | $2.6M | +574 (+0.1%) | September 30, 2026 |
| 14 | iShares Biotechnology ETF | 0.74% | 379K | $2.4M | −2,872 (−0.8%) | September 30, 2026 |
| 15 | PIMCO RAE US Small Instl | 0.68% | 351K | $2.2M | +20,314 (+6.1%) | June 30, 2026 |
| 16 | Dimensional US Small Cap Value ETF | 0.60% | 306K | $2.0M | — | September 24, 2026 |
| 17 | Vanguard Russell 2000 ETF | 0.59% | 303K | $1.9M | +4,480 (+1.5%) | September 30, 2026 |
| 18 | Schwab US Small-Cap ETF™ | 0.52% | 267K | $1.7M | +180 (+0.1%) | September 30, 2026 |
| 19 | Fidelity Extended Market Index | 0.51% | 263K | $1.7M | +3,523 (+1.4%) | August 31, 2026 |
| 20 | DFA US Small Cap I | 0.44% | 227K | $1.5M | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
EBS insider transactions
latest 5| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-12-05 | Ronald Richard | Sell | $11.97 | 21,984 | $263,148 |
| 2025-10-07 | Coleen Glessner | Sell | $10.00 | 30,608 | $306,080 |
| 2025-08-15 | Kathryn C Zoon | Sell | $8.87 | 7,086 | $62,853 |
| 2025-08-12 | Donald W Degolyer | Sell | $8.65 | 7,844 | $67,851 |
| 2025-05-23 | Keith Katkin | Sell | $6.30 | 7,844 | $49,417 |
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.
EBS shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns EBS
Institutional investors own 90.2% of Emergent BioSolutions's shares and insiders 4.21%. The largest holder is BlackRock Inc with 9.20% of the shares (4.7M), as of June 30, 2026. Among the top 20 institutions, 13 added shares and 5 reduced their stake in the latest filings. Short interest is 18.41% of the float, or 8.24 days of average trading volume. The share count rose 13.0% since 2014.
Related: EBS analyst forecast, EBS key metrics. See the EBS stock overview for the latest quote and news.
EBS ownership FAQ
Who owns the most Emergent BioSolutions stock?
The largest shareholders of Emergent BioSolutions are BlackRock Inc (9.20%), Dimensional Fund Advisors, Inc. (6.00%), State Street Corp (5.71%), American Century Companies Inc (5.40%), Vanguard Capital Management, LLC (4.29%).
What percentage of Emergent BioSolutions is owned by institutions?
Institutions hold 90.2% of Emergent BioSolutions's shares outstanding; insiders hold 4.21%.
Which funds own Emergent BioSolutions?
The largest fund holders of Emergent BioSolutions are Avantis US Small Cap Value ETF (5.71%), State Street® SPDR® S&P® Biotech ETF (3.17%), Vanguard MStar Total Stk Mkt Idx Invest (3.03%), iShares Russell 2000 ETF (2.71%), DFA US Small Cap Value I (1.38%).
What is Emergent BioSolutions's short interest?
9.3M shares of Emergent BioSolutions were sold short, 18.41% of the float; at the average daily volume it would take 8.24 days to cover.
Are insiders buying or selling Emergent BioSolutions?
Of the latest 5 reported insider transactions in Emergent BioSolutions (since May 23, 2025), 0 were purchases and 5 were sales.
How many shares of Emergent BioSolutions are outstanding?
Emergent BioSolutions has 51.3M shares outstanding, of which 49.1M are in the public float.