137 tracked 13F filers disclose a position in OSUR as of the latest SEC 13F filings, a combined $171.1M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $19.5M | 6.5M | ▲+1.1% Added · +69K sh | Q1 2026 | |
| 2 | Neuberger Berman Group LLC | $13.1M | 4.4M | ▲+9.5% Added · +377K sh | Q1 2026 | |
| 3 | PRIVATE MANAGEMENT GROUP INC | $16.9M | 3.8M | ▼−30% Reduced · −1.6M sh | Q2 2026 | |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | $9.1M | 3.0M | →First observed position No prior filed position | Q1 2026 | |
| 5 | DIMENSIONAL FUND ADVISORS LP | $8.5M | 2.8M | ▼−13% Reduced · −438K sh | Q1 2026 | |
| 6 | SYSTEMATIC FINANCIAL MANAGEMENT LP | $7.4M | 2.5M | ▲+0.1% Added · +3K sh | Q1 2026 | |
| 7 | RENAISSANCE TECHNOLOGIES LLC | $6.2M | 2.1M | ▼−2.9% Reduced · −62K sh | Q1 2026 | |
| 8 | CANNELL CAPITAL LLC | $6.0M | 2.0M | ▲+2.5% Added · +49K sh | Q1 2026 | |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | $8.1M | 1.8M | ▼−0.7% Reduced · −12K sh | Q2 2026 | |
| 10 | STATE STREET CORP | $7.5M | 1.7M | ▼−1.1% Reduced · −18K sh | Q2 2026 | |
| 11 | GAGNON SECURITIES LLC | $7.1M | 1.6M | ▼−7.1% Reduced · −122K sh | Q2 2026 | |
| 12 | D. E. Shaw & Co., Inc. | $4.1M | 1.4M | ▼−17% Reduced · −283K sh | Q1 2026 | |
| 13 | Gagnon Advisors, LLC | $5.4M | 1.2M | —Held | Q2 2026 | |
| 14 | First Eagle Investment Management, LLC | $4.7M | 1.1M | ▲New +1.1M sh | Q2 2026 | |
| 15 | JACOBS LEVY EQUITY MANAGEMENT, INC | $3.0M | 1000K | ▲+1.1% Added · +11K sh | Q1 2026 | |
| 16 | Peapod Lane Capital LLC | $4.4M | 994K | ▼−2.4% Reduced · −25K sh | Q2 2026 | |
| 17 | WELLS FARGO & COMPANY/MN | $2.7M | 900K | ▲+2.6% Added · +23K sh | Q1 2026 | |
| 18 | Archon Capital Management LLC | $2.2M | 748K | ▲+30% Added · +174K sh | Q1 2026 | |
| 19 | NORTHERN TRUST CORP | $1.8M | 595K | ▲+3.4% Added · +20K sh | Q1 2026 | |
| 20 | VANGUARD PORTFOLIO MANAGEMENT LLC | $1.8M | 590K | →First observed position No prior filed position | Q1 2026 | |
| 21 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $1.8M | 586K | ▼−5.8% Reduced · −36K sh | Q1 2026 | |
| 22 | Sixth Street Partners Management Company, L.P. | $2.6M | 580K | ▲New +580K sh | Q2 2026 | |
| 23 | VANGUARD FIDUCIARY TRUST CO | $1.4M | 455K | →First observed position No prior filed position | Q1 2026 | |
| 24 | SEI INVESTMENTS CO | $1.3M | 418K | ▲+127% Added · +234K sh | Q1 2026 | |
| 25 | GOLDMAN SACHS GROUP INC | $1.2M | 412K | ▲+30% Added · +94K sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 6 funds opened a new position in OSUR and 18 added to an existing one, while 18 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 61 funds | $133.6B |
| NVIDIA CORPNVDA | 60 funds | $194.7B |
| APPLE INCAAPL | 59 funds | $148.6B |
| ALPHABET INC-CL AGOOGL | 59 funds | $73.7B |
| ALPHABET INC-CL CGOOG | 59 funds | $68.1B |
| JPMORGAN CHASE & COJPM | 59 funds | $30.4B |
| META PLATFORMS INC-CLASS AMETA | 58 funds | $58.8B |
| BERKSHIRE HATHAWAY INC-CL BBRK/B | 58 funds | $20.2B |
| UNITEDHEALTH GROUP INCUNH | 58 funds | $15.6B |
| VISA INC-CLASS A SHARESV | 57 funds | $31.5B |
| COSTCO WHOLESALE CORPCOST | 57 funds | $19.3B |
| WALMART INCWMT | 57 funds | $15.2B |
Ranked by how many of OSUR's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| May 14, 2026 | Boyd Steven Kyle | Director | Buy (P) | 25K | $75K |
| May 13, 2026 | Boyd Steven Kyle | Director | Buy (P) | 25K | $76K |
| May 12, 2026 | Boyd Steven Kyle | Director | Buy (P) | 25K | $75K |
| Mar 20, 2026 | EGLINTON MANNER CARRIE | President & CEO, Director | Buy (P) | 32K | $95K |
| Mar 20, 2026 | McGrath Kenneth J | Chief Financial Officer | Buy (P) | 32K | $95K |
| Mar 13, 2026 | EGLINTON MANNER CARRIE | President & CEO, Director | Buy (P) | 22K | $66K |
| Mar 13, 2026 | McGrath Kenneth J | Chief Financial Officer | Buy (P) | 22K | $66K |
| Nov 28, 2025 | Gagliano Nancy J | Director | Buy (P) | 2K | $5K |
| Feb 28, 2025 | EGLINTON MANNER CARRIE | President & CEO, Director | Buy (P) | 29K | $100K |
| Feb 27, 2025 | Marmora Lelio | Director | Buy (P) | 7K | $21K |
| Feb 27, 2025 | McGrath Kenneth J | Chief Financial Officer | Buy (P) | 64K | $202K |
| Feb 27, 2025 | Kenny John P. | Director | Buy (P) | 48K | $151K |
Connected entities for OSUR
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/OSUR/capital-change-brief"
Use Arkolith's capital_change_brief for OSUR. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for OSUR. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.