Who owns OraSure Technologies, Inc. (OSUR)
Which tracked institutional funds hold OSUR, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See OSUR 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 OSUR is one-sided between 2025-Q4 and 2026-Q1: 30 added or opened and 9 trimmed or exited — on balance accumulating.
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
OSUR’s largest tracked holder by dollar value, NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO, 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 conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in OSUR 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 141 tracked filers holding OSUR, 74 increased or opened the position and 62 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
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 OSUR 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 4
- VANGUARD CAPITAL MANAGEMENT LLC$9M
- Yorkville Advisors Global, LP$2M
- VANGUARD PORTFOLIO MANAGEMENT LLC$2M
- VANGUARD FIDUCIARY TRUST CO$1M
Full exits 5
- NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO$60M
- VANGUARD GROUP INC$10M
- KOTLER KEVIN$4M
- Steamboat Capital Partners, LLC$968K
- Qube Research & Technologies Ltd$525K
Largest adds
- BlackRock, Inc.$4M
- NEUBERGER BERMAN GROUP LLC$3M
- PRIVATE MANAGEMENT GROUP INC$3M
- Altai Capital Management, L.P.$2M
- SYSTEMATIC FINANCIAL MANAGEMENT LP$1M
- GAGNON SECURITIES LLC$1M
Largest trims
- MILLENNIUM MANAGEMENT LLC$2M
- UBS Group AG$915K
- CITADEL ADVISORS LLC$787K
- JANE STREET GROUP, LLC$489K
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 | 6,516,216 | $20M | 7.6% | 2026-Q1 |
| PRIVATE MANAGEMENT GROUP INC added | 5,422,129 | $16M | 6.3% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC added | 4,361,901 | $13M | 5.1% | 2026-Q1 |
| Altai Capital Management, L.P. trimmed | 3,613,836 | $11M | 4.2% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 3,030,888 | $9M | 3.5% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 2,820,830 | $8M | 3.3% | 2026-Q1 |
| SYSTEMATIC FINANCIAL MANAGEMENT LP added | 2,480,483 | $7M | 2.9% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 2,083,303 | $6M | 2.4% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC | 2,022,119 | $6M | 2.4% | 2026-Q1 |
| CANNELL CAPITAL LLC added | 2,003,271 | $6M | 2.3% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,820,019 | $5M | 2.1% | 2026-Q1 |
| GAGNON SECURITIES LLC added | 1,714,391 | $5M | 2.0% | 2026-Q1 |
| STATE STREET CORP added | 1,704,780 | $5M | 2.0% | 2026-Q1 |
| D. E. Shaw & Co., Inc. trimmed | 1,382,388 | $4M | 1.6% | 2026-Q1 |
| Gagnon Advisors, LLC | 1,207,440 | $4M | 1.4% | 2026-Q1 |
| Peapod Lane Capital LLC added | 1,018,476 | $3M | 1.2% | 2026-Q1 |
| JACOBS LEVY EQUITY MANAGEMENT, INC added | 999,593 | $3M | 1.2% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN added | 899,841 | $3M | 1.0% | 2026-Q1 |
| Archon Capital Management LLC added | 747,909 | $2M | 0.9% | 2026-Q1 |
| Yorkville Advisors Global, LP new | 635,000 | $2M | 0.7% | 2026-Q1 |
| NORTHERN TRUST CORP added | 595,172 | $2M | 0.7% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 590,198 | $2M | 0.7% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 585,837 | $2M | 0.7% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 454,775 | $1M | 0.5% | 2026-Q1 |
| SEI INVESTMENTS CO added | 417,958 | $1M | 0.5% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 411,526 | $1M | 0.5% | 2026-Q1 |
| MORGAN STANLEY trimmed | 373,947 | $1M | 0.4% | 2026-Q1 |
| KLP KAPITALFORVALTNING AS | 363,300 | $1M | 0.4% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 360,524 | $1M | 0.4% | 2026-Q1 |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC | 349,064 | $1M | 0.4% | 2026-Q1 |
| Orion Porfolio Solutions, LLC added | 324,517 | $974K | 0.4% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 323,089 | $969K | 0.4% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP added | 288,621 | $866K | 0.3% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed | 284,563 | $854K | 0.3% | 2026-Q1 |
| UBS Group AG trimmed | 243,294 | $730K | 0.3% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 218,233 | $655K | 0.3% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 200,377 | $601K | 0.2% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC trimmed | 199,924 | $600K | 0.2% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 195,769 | $588K | 0.2% | 2026-Q1 |
| Invesco Ltd. added | 165,003 | $495K | 0.2% | 2026-Q1 |
| Nuveen, LLC added | 159,359 | $478K | 0.2% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 153,610 | $461K | 0.2% | 2026-Q1 |
| HSBC HOLDINGS PLC added | 141,309 | $421K | 0.2% | 2026-Q1 |
| STRS OHIO trimmed | 137,000 | $411K | 0.2% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 134,406 | $403K | 0.2% | 2026-Q1 |
| Odyssean, LLC added | 133,937 | $402K | 0.2% | 2026-Q1 |
| JANE STREET GROUP, LLC trimmed | 125,516 | $377K | 0.1% | 2026-Q1 |
| SIMPLEX TRADING, LLC added | 118,051 | $354K | 0.1% | 2026-Q1 |
| Murphy Pohlad Asset Management LLC added | 115,867 | $348K | 0.1% | 2026-Q1 |
| XTX Topco Ltd trimmed | 115,714 | $347K | 0.1% | 2026-Q1 |
| BARCLAYS PLC trimmed | 115,172 | $346K | 0.1% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 114,592 | $344K | 0.1% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL trimmed | 112,756 | $338K | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 124,816 | $302K | 0.1% | 2026-Q1 |
| FULLER & THALER ASSET MANAGEMENT, INC. new | 99,244 | $298K | 0.1% | 2026-Q1 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO | 93,379 | $280K | 0.1% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 84,957 | $255K | 0.1% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 83,697 | $251K | 0.1% | 2026-Q1 |
| HighTower Advisors, LLC added | 63,264 | $190K | 0.1% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 56,100 | $168K | 0.1% | 2026-Q1 |
| Nierenberg Investment Management Company, LLC added | 55,555 | $167K | 0.1% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 55,306 | $166K | 0.1% | 2026-Q1 |
| Empowered Funds, LLC | 49,631 | $149K | 0.1% | 2026-Q1 |
| BFSG, LLC added | 44,350 | $133K | 0.1% | 2026-Q1 |
| MetLife Investment Management, LLC added | 38,239 | $115K | 0.0% | 2026-Q1 |
| Metis Global Partners, LLC trimmed | 34,430 | $103K | 0.0% | 2026-Q1 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM | 34,338 | $103K | 0.0% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 33,698 | $101K | 0.0% | 2026-Q1 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO added | 49,755 | $60M | 23.5% | 2025-Q4 stale |
| VANGUARD GROUP INC trimmed | 4,102,632 | $10M | 3.9% | 2025-Q4 stale |
| KOTLER KEVIN new | 1,801,446 | $4M | 1.7% | 2025-Q4 stale |
| Camber Capital Management LP | 900,000 | $3M | 1.0% | 2025-Q2 stale |
| Allianz Asset Management GmbH | 574,266 | $2M | 0.7% | 2025-Q3 stale |
| Kent Lake PR LLC new | 567,860 | $2M | 0.7% | 2025-Q3 stale |
| GLOBEFLEX CAPITAL L P | 378,040 | $1M | 0.5% | 2025-Q1 stale |
| Steamboat Capital Partners, LLC trimmed | 400,000 | $968K | 0.4% | 2025-Q4 stale |
| Factorial Partners, LLC trimmed | 279,592 | $897K | 0.3% | 2025-Q3 stale |
| MARTINGALE ASSET MANAGEMENT L P trimmed | 217,464 | $733K | 0.3% | 2025-Q1 stale |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC trimmed | 190,865 | $573K | 0.2% | 2025-Q2 stale |
| Qube Research & Technologies Ltd added | 216,941 | $525K | 0.2% | 2025-Q4 stale |
| Orion Portfolio Solutions, LLC added | 108,135 | $364K | 0.1% | 2025-Q1 stale |
| EntryPoint Capital, LLC trimmed | 84,422 | $285K | 0.1% | 2025-Q1 stale |
| Nebula Research & Development LLC trimmed | 68,752 | $232K | 0.1% | 2025-Q1 stale |
| PRIMECAP MANAGEMENT CO/CA/ trimmed | 76,100 | $228K | 0.1% | 2025-Q2 stale |
| WINTON GROUP Ltd trimmed | 74,391 | $223K | 0.1% | 2025-Q2 stale |
| HRT FINANCIAL LP added | 69,326 | $222K | 0.1% | 2025-Q3 stale |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 64,805 | $194K | 0.1% | 2025-Q2 stale |
| T3 Companies, LLC new | 77,400 | $187K | 0.1% | 2025-Q4 stale |
| State of Wyoming trimmed | 59,698 | $179K | 0.1% | 2025-Q2 stale |
| FRANKLIN RESOURCES INC trimmed | 49,527 | $167K | 0.1% | 2025-Q1 stale |
| PRELUDE CAPITAL MANAGEMENT, LLC trimmed | 48,800 | $164K | 0.1% | 2025-Q1 stale |
| Robeco Institutional Asset Management B.V. | 47,625 | $160K | 0.1% | 2025-Q1 stale |
| RBF Capital, LLC | 48,096 | $154K | 0.1% | 2025-Q3 stale |
| Brooklyn Investment Group trimmed | 46,831 | $141K | 0.1% | 2025-Q3 stale |
| TWO SIGMA ADVISERS, LP trimmed | 57,100 | $138K | 0.1% | 2025-Q4 stale |
| Centiva Capital, LP added | 38,904 | $131K | 0.1% | 2025-Q1 stale |
| Jump Financial, LLC trimmed | 54,093 | $131K | 0.1% | 2025-Q4 stale |
| ROYCE & ASSOCIATES LP trimmed | 36,615 | $123K | 0.0% | 2025-Q1 stale |
| Corebridge Financial, Inc. trimmed | 35,360 | $119K | 0.0% | 2025-Q1 stale |
| Assenagon Asset Management S.A. | 48,409 | $117K | 0.0% | 2025-Q4 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.