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Livermore
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Orasure Technologies Inc

OSUR
Exchange
Nasdaq
Industry
Surgical & Medical Instruments & Apparatus
SEC CIK
0001116463

No open-market purchases or sales by Orasure Technologies Inc insiders were filed in the last 90 days; 151 institutions reported holding it in 13F filings for Q2 2026, worth $227.9M in total; no superinvestor holds it.

Holders of 5% or more of OSUR

Holders whose latest Schedule 13D or 13G filing reports 5% or more of Orasure Technologies Inc, largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of OSUR
HolderLatest formStakeChangeFirst filedLatest filingFiling
BlackRock, Inc.13G/A7.20%5.40M shares–Apr 23, 20251 filingApr 23, 2025SEC
Gagnon Securities LLC13G5.80%8.87M sharesNewAug 12, 20261 filingAug 12, 2026SEC
Neuberger Berman Group LLC13G5.70%4.28M shares+0.80 ppfrom 4.90%Oct 4, 20243 filingsApr 4, 2025SEC
Islet Management, LP13D5.70%3.92M sharesNewSep 17, 20261 filingSep 17, 2026SEC
Private Management Group Inc13G/A5.50%3.80M shares−1.80 ppfrom 7.30%May 5, 20253 filingsJul 31, 2026SEC
Gagnon Securities LLC13G5.40%3.75M shares+0.50 ppfrom 4.90%Nov 17, 20253 filingsApr 8, 2026SEC
Altai Capital Management, L.P.13D/A5.20%3.61M shares0.00 ppfrom 5.20%Sep 9, 20255 filingsApr 20, 2026SEC
Vanguard Capital Management LLC13G5.04%3.48M sharesNewApr 30, 20261 filingApr 30, 2026SEC
Dimensional Fund Advisors LP13G/A5.00%3.64M shares–Feb 12, 20213 filingsOct 9, 2025SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

46 Schedule 13D and 13G filings on Orasure Technologies Inc, newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on OSUR
Filed (ET)FilerFormStakeChangeEvent dateFiling
Sep 17, 20268:08 PM ETIslet Management, LPand 8 others13D5.70%3.92M sharesNewSep 14, 2026SEC
Aug 12, 20266:06 PM ETGagnon Securities LLCand 2 others13G5.80%8.87M sharesNewAug 5, 2026SEC
Jul 31, 20261:10 PM ETPrivate Management Group Inc13G/A5.50%3.80M shares−1.80 ppfrom 7.30%Jun 30, 2026SEC
Apr 30, 202612:00 PM ETVanguard Capital Management LLC13G5.04%3.48M sharesNewMar 31, 2026SEC
Apr 20, 20268:02 AM ETAltai Capital Management, L.P.and 2 others13D/A5.20%3.61M shares0.00 ppfrom 5.20%Apr 16, 2026SEC
Apr 8, 20266:34 PM ETGagnon Securities LLCand 2 others13G5.40%3.75M shares+0.50 ppfrom 4.90%Jan 8, 2026SEC
Mar 27, 202611:06 AM ETVanguard Group Inc13G/A0.00%0 shares–Below 5%Mar 13, 2026SEC
Mar 17, 20267:57 PM ETAltai Capital Management, L.P.and 2 others13D/A5.20%3.61M shares−0.01 ppfrom 5.21%Mar 17, 2026SEC
Feb 12, 20265:56 PM ETGagnon Securities LLCand 2 others13G/A4.90%3.57M shares−0.10 ppfrom 5.00%Below 5%Dec 31, 2025SEC
Jan 15, 20268:45 AM ETAltai Capital Management, L.P.and 2 others13D/A5.21%3.74M shares0.00 ppfrom 5.21%Jan 15, 2026SEC
Dec 17, 20258:06 AM ETAltai Capital Management, L.P.and 2 others13D/A5.21%3.74M shares+0.08 ppfrom 5.13%Dec 17, 2025SEC
Nov 17, 20254:06 PM ETGagnon Securities LLCand 2 others13G5.00%3.59M sharesNewNov 11, 2025SEC
Oct 9, 20251:48 PM ETDimensional Fund Advisors LP13G/A5.00%3.64M shares–Sep 30, 2025SEC
Sep 9, 20258:00 AM ETAltai Capital Management, L.P.and 2 others13D5.13%3.75M sharesNewSep 2, 2025SEC
Sep 3, 20254:31 PM ETEarnest Partners LLC13G/A0.00%795 shares–Below 5%Dec 31, 2022SEC
Jul 30, 20255:30 PM ETPrivate Management Group Inc13G/A7.30%5.46M shares+1.40 ppfrom 5.90%Jun 30, 2025SEC
May 15, 20254:16 PM ETCamber Capital Management LPand 1 other13G/A1.20%900.0K shares–Below 5%Mar 31, 2025SEC
May 5, 20256:17 PM ETPrivate Management Group Inc13G5.90%4.42M sharesNewMar 31, 2025SEC
Apr 23, 20258:57 PM ETBlackRock, Inc.13G/A7.20%5.40M shares–Mar 31, 2025SEC
Apr 4, 20252:12 PM ETNeuberger Berman Group LLCand 1 other13G5.70%4.28M shares+0.80 ppfrom 4.90%Mar 31, 2025SEC
Jan 7, 20252:46 PM ETNeuberger Berman Group LLCand 1 other13G/A4.90%3.63M shares–Below 5%Dec 31, 2024SEC
Nov 12, 2024Vanguard Group Inc13G/AOld format–––SEC
Nov 4, 2024Vanguard Group Inc13G/AOld format–––SEC
Oct 4, 2024Neuberger Berman Group LLC13GOld format–New–SEC
Sep 10, 202412:09 PM ETBlackRock Inc.13G/AOld format–––SEC
Jul 8, 20244:32 PM ETBlackRock Inc.13G/AOld format–––SEC
Feb 13, 2024Vanguard Group Inc13G/AOld format–––SEC
Feb 9, 2024Dimensional Fund Advisors LP13GOld format–––SEC
Jan 22, 20242:03 PM ETBlackRock Inc.13G/AOld format–––SEC
Feb 9, 2023Vanguard Group Inc13G/AOld format–––SEC
Feb 7, 2023Managed Account Advisors LLC13G/AOld format–––SEC
Feb 2, 2023Camber Capital Management LP13GOld format–––SEC
Jan 23, 20233:52 PM ETBlackRock Inc.13G/AOld format–––SEC
Feb 10, 2022Vanguard Group Inc13G/AOld format–––SEC
Feb 8, 2022Earnest Partners LLC13GOld format–New–SEC
Jan 28, 20221:54 PM ETBlackRock Inc.13G/AOld format–––SEC
Jan 26, 2022Managed Account Advisors LLC13G/AOld format–––SEC
Nov 8, 2021Camber Capital Management LP13DOld format–––SEC
Jul 29, 2021Camber Capital Management LP13GOld format–New–SEC
Feb 16, 2021American Capital Management Inc13GOld format–New–SEC
Feb 12, 2021Dimensional Fund Advisors LP13G/AOld format–––SEC
Feb 11, 2021Renaissance Technologies LLC13G/AOld format–––SEC
Feb 10, 2021Vanguard Group Inc13G/AOld format–––SEC
Feb 4, 2021Wellington Management Group LLP13G/AOld format–––SEC
Feb 3, 2021Managed Account Advisors LLC13GOld format–New–SEC
Jan 25, 20214:49 PM ETBlackRock Inc.13GOld format–New–SEC

Form 144: proposed insider sales

3 notices from officers, directors and other affiliates planning to sell Orasure Technologies Inc shares, newest first.

Form 144 notices for OSUR
Filed (ET)SellerShares to sellMarket valuePlanned saleBrokerFiling
Dec 4, 20251:45 PM ETMara AspinallBoard89.7K$225.0KDec 4, 2025MERRILL LYNCHSEC
Dec 19, 20234:22 PM ETWeber Kathleen GallagherOfficer24.1K$194.2KDec 19, 202310b5-1Fidelity Brokerage Services LLCSEC
Aug 15, 20234:35 PM ETAnthony Michele MarieOfficer1.76K$11.4KAug 15, 2023Fidelity Brokerage Services LLCSEC