Who owns Emergent BioSolutions Inc. (EBS)
Which tracked institutional funds hold EBS, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See EBS company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on EBS is one-sided between 2025-Q4 and 2026-Q1: 19 added or opened and 66 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
EBS’s largest tracked holder by dollar value, VANGUARD GROUP INC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes EBS more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in EBS divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 189 tracked filers holding EBS, 106 increased or opened the position and 84 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in EBS between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 9
- VANGUARD CAPITAL MANAGEMENT LLC$19M
- VANGUARD PORTFOLIO MANAGEMENT LLC$9M
- Pacer Advisors, Inc.$7M
- Prosight Management, LP$5M
- VANGUARD FIDUCIARY TRUST CO$3M
- Vanguard Global Advisers, LLC$1M
Full exits 9
- VANGUARD GROUP INC$40M
- CITADEL ADVISORS LLC$3M
- Coppell Advisory Solutions LLC$2M
- Brandywine Global Investment Management, LLC$2M
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$678K
- SIERRA SUMMIT ADVISORS LLC$599K
Largest adds
- PRUDENTIAL FINANCIAL INC$3M
- AQR CAPITAL MANAGEMENT LLC$2M
- BNP PARIBAS FINANCIAL MARKETS$2M
- TWO SIGMA INVESTMENTS, LP$2M
- MILLENNIUM MANAGEMENT LLC$1M
- Ancora Advisors LLC$1M
Largest trims
- OAK HILL ADVISORS LP$35M
- BlackRock, Inc.$17M
- AMERICAN CENTURY COMPANIES INC$10M
- Jain Global LLC$10M
- STATE STREET CORP$10M
- MORGAN STANLEY$8M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 4,341,462 | $36M | 8.8% | 2026-Q1 |
| STATE STREET CORP added | 2,849,701 | $24M | 5.8% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 2,757,158 | $23M | 5.6% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC trimmed | 2,425,722 | $20M | 4.9% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 2,257,995 | $19M | 4.6% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 1,506,075 | $13M | 3.0% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC added | 1,381,624 | $11M | 2.8% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,272,909 | $11M | 2.6% | 2026-Q1 |
| PALISADE CAPITAL MANAGEMENT, LP trimmed | 1,201,323 | $10M | 2.4% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 1,117,278 | $9M | 2.3% | 2026-Q1 |
| OAK HILL ADVISORS LP trimmed | 1,113,338 | $9M | 2.3% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 1,003,912 | $8M | 2.0% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 982,837 | $8M | 2.0% | 2026-Q1 |
| LSV ASSET MANAGEMENT trimmed | 896,700 | $7M | 1.8% | 2026-Q1 |
| Pacer Advisors, Inc. added | 2,316,517 | $7M | 1.6% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 811,560 | $7M | 1.6% | 2026-Q1 |
| Prescott Group Capital Management, L.L.C. | 772,771 | $6M | 1.6% | 2026-Q1 |
| MORGAN STANLEY trimmed | 744,536 | $6M | 1.5% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 656,047 | $5M | 1.3% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 648,377 | $5M | 1.3% | 2026-Q1 |
| Prosight Management, LP new | 639,118 | $5M | 1.3% | 2026-Q1 |
| NORTHERN TRUST CORP added | 600,912 | $5M | 1.2% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 577,128 | $5M | 1.2% | 2026-Q1 |
| MARSHALL WACE, LLP trimmed | 566,442 | $5M | 1.1% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 532,001 | $4M | 1.1% | 2026-Q1 |
| Trexquant Investment LP added | 524,233 | $4M | 1.1% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 513,904 | $4M | 1.0% | 2026-Q1 |
| Allianz Asset Management GmbH added | 469,566 | $4M | 1.0% | 2026-Q1 |
| FEDERATED HERMES, INC. added | 456,319 | $4M | 0.9% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 448,815 | $4M | 0.9% | 2026-Q1 |
| Ancora Advisors LLC added | 409,267 | $3M | 0.8% | 2026-Q1 |
| UBS Group AG added | 393,224 | $3M | 0.8% | 2026-Q1 |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC trimmed | 369,503 | $3M | 0.7% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 353,829 | $3M | 0.7% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 345,121 | $3M | 0.7% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 335,898 | $3M | 0.7% | 2026-Q1 |
| Values First Advisors, Inc. added | 307,880 | $3M | 0.6% | 2026-Q1 |
| Squarepoint Ops LLC added | 299,449 | $2M | 0.6% | 2026-Q1 |
| HRT FINANCIAL LP trimmed | 275,933 | $2M | 0.6% | 2026-Q1 |
| GLOBEFLEX CAPITAL L P | 241,298 | $2M | 0.5% | 2026-Q1 |
| Cetera Investment Advisers added | 225,483 | $2M | 0.5% | 2026-Q1 |
| Morse Asset Management, Inc trimmed | 221,799 | $2M | 0.4% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 215,043 | $2M | 0.4% | 2026-Q1 |
| Jain Global LLC trimmed | 198,984 | $2M | 0.4% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 186,611 | $2M | 0.4% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 183,443 | $2M | 0.4% | 2026-Q1 |
| Invesco Ltd. trimmed | 182,455 | $2M | 0.4% | 2026-Q1 |
| WOLVERINE ASSET MANAGEMENT LLC | 174,933 | $1M | 0.4% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 161,943 | $1M | 0.3% | 2026-Q1 |
| Susquehanna Portfolio Strategies, LLC | 156,443 | $1M | 0.3% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 154,169 | $1M | 0.3% | 2026-Q1 |
| FMR LLC added | 153,888 | $1M | 0.3% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 151,246 | $1M | 0.3% | 2026-Q1 |
| CREDIT AGRICOLE S A added | 146,300 | $1M | 0.3% | 2026-Q1 |
| STATE OF WISCONSIN INVESTMENT BOARD added | 125,868 | $1M | 0.3% | 2026-Q1 |
| JANE STREET GROUP, LLC trimmed | 117,315 | $974K | 0.2% | 2026-Q1 |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 112,910 | $937K | 0.2% | 2026-Q1 |
| SILVER OAK SECURITIES, INCORPORATED | 106,700 | $886K | 0.2% | 2026-Q1 |
| Nuveen, LLC added | 106,047 | $880K | 0.2% | 2026-Q1 |
| SEGALL BRYANT & HAMILL, LLC | 105,980 | $867K | 0.2% | 2026-Q1 |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 96,700 | $803K | 0.2% | 2026-Q1 |
| Rafferty Asset Management, LLC trimmed | 85,199 | $707K | 0.2% | 2026-Q1 |
| Palumbo Wealth Management LLC trimmed | 80,264 | $666K | 0.2% | 2026-Q1 |
| TRUIST FINANCIAL CORP trimmed | 74,033 | $614K | 0.1% | 2026-Q1 |
| LOS ANGELES CAPITAL MANAGEMENT LLC trimmed | 69,489 | $577K | 0.1% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 68,218 | $566K | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 45,240 | $559K | 0.1% | 2026-Q1 |
| MARTINGALE ASSET MANAGEMENT L P added | 66,554 | $552K | 0.1% | 2026-Q1 |
| LPL Financial LLC trimmed | 66,513 | $552K | 0.1% | 2026-Q1 |
| EVOLVE PRIVATE WEALTH, LLC new | 65,754 | $546K | 0.1% | 2026-Q1 |
| RITHOLTZ WEALTH MANAGEMENT trimmed | 65,268 | $542K | 0.1% | 2026-Q1 |
| JAMES INVESTMENT RESEARCH, INC. added | 61,963 | $514K | 0.1% | 2026-Q1 |
| Sanctuary Advisors, LLC new | 61,237 | $508K | 0.1% | 2026-Q1 |
| OXFORD ASSET MANAGEMENT LLP added | 57,638 | $478K | 0.1% | 2026-Q1 |
| Assenagon Asset Management S.A. trimmed | 56,455 | $469K | 0.1% | 2026-Q1 |
| Aquatic Capital Management LLC added | 55,646 | $462K | 0.1% | 2026-Q1 |
| IEQ CAPITAL, LLC added | 51,333 | $426K | 0.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 48,439 | $402K | 0.1% | 2026-Q1 |
| Man Group plc added | 45,200 | $375K | 0.1% | 2026-Q1 |
| SG Americas Securities, LLC added | 42,394 | $352K | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 3,197,251 | $40M | 9.6% | 2025-Q4 stale |
| CITADEL ADVISORS LLC trimmed | 232,019 | $3M | 0.7% | 2025-Q4 stale |
| Coppell Advisory Solutions LLC new | 161,307 | $2M | 0.5% | 2025-Q4 stale |
| Brandywine Global Investment Management, LLC trimmed | 130,310 | $2M | 0.4% | 2025-Q4 stale |
| Qube Research & Technologies Ltd trimmed | 167,057 | $1M | 0.4% | 2025-Q3 stale |
| JACOBS LEVY EQUITY MANAGEMENT, INC trimmed | 139,806 | $1M | 0.3% | 2025-Q3 stale |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 54,835 | $678K | 0.2% | 2025-Q4 stale |
| HUSSMAN STRATEGIC ADVISORS, INC. added | 105,000 | $670K | 0.2% | 2025-Q2 stale |
| SIERRA SUMMIT ADVISORS LLC new | 48,460 | $599K | 0.1% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 45,400 | $561K | 0.1% | 2025-Q4 stale |
| Hilltop Holdings Inc. trimmed | 60,861 | $537K | 0.1% | 2025-Q3 stale |
| Jump Financial, LLC trimmed | 42,142 | $521K | 0.1% | 2025-Q4 stale |
| SeaCrest Wealth Management, LLC added | 106,700 | $519K | 0.1% | 2025-Q1 stale |
| HARBOR CAPITAL ADVISORS, INC. added | 40,859 | $505K | 0.1% | 2025-Q4 stale |
| AdvisorShares Investments LLC new | 39,900 | $493K | 0.1% | 2025-Q4 stale |
| Weiss Asset Management LP new | 37,785 | $467K | 0.1% | 2025-Q4 stale |
| Alberta Investment Management Corp added | 94,200 | $458K | 0.1% | 2025-Q1 stale |
| Graham Capital Management, L.P. added | 51,072 | $450K | 0.1% | 2025-Q3 stale |
| Engineers Gate Manager LP added | 86,910 | $422K | 0.1% | 2025-Q1 stale |
| Advantage Alpha Capital Partners LP new | 45,936 | $405K | 0.1% | 2025-Q3 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.