The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This stock page is the Follow view. The Build view lets your agent query OPCH owners, fund changes, insider filings, and source links through REST or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/OPCH"
Use Arkolith to show who owns OPCH, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $535.4M | 19.9M | ▲+0.1% Added · +19K sh | Q1 2026 | |
| 2 | VANGUARD GROUP INC | $530.4M | 16.6M | ▼−5.9% Reduced · −1.0M sh | Q4 2025 | |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | $217.0M | 8.1M | ▲New +8.1M sh | Q1 2026 | |
| 4 | FULLER & THALER ASSET MANAGEMENT, INC. | $191.8M | 7.1M | ▲+2.4% Added · +166K sh | Q1 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $188.9M | 7.0M | ▲New +7.0M sh | Q1 2026 | |
| 6 | FMR LLC | $173.0M | 6.4M | ▼−31% Reduced · −2.9M sh | Q1 2026 | |
| 7 | STATE STREET CORP | $158.2M | 5.9M | ▲+1.5% Added · +85K sh | Q1 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $114.4M | 4.2M | ▲+3.2% Added · +131K sh | Q1 2026 | |
| 9 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $114.0M | 4.2M | ▼−0.3% Reduced · −12K sh | Q1 2026 | |
| 10 | DIMENSIONAL FUND ADVISORS LP | $104.4M | 3.9M | ▲+0.9% Added · +36K sh | Q1 2026 | |
| 11 | Southpoint Capital Advisors LP | $96.9M | 3.6M | ▲+20% Added · +600K sh | Q1 2026 | |
| 12 | CITADEL ADVISORS LLC | $95.2M | 3.5M | ▲+111% Added · +1.9M sh | Q1 2026 | |
| 13 | MORGAN STANLEY | $75.8M | 2.8M | ▼−17% Reduced · −596K sh | Q1 2026 | |
| 14 | Sumitomo Mitsui Trust Group, Inc. | $70.3M | 2.6M | ▲New +2.6M sh | Q1 2026 | |
| 15 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $67.0M | 2.5M | ▲+2.6% Added · +63K sh | Q1 2026 | |
| 16 | Boston Partners | $65.6M | 2.4M | ▲+68% Added · +980K sh | Q1 2026 | |
| 17 | NORGES BANK | $61.8M | 1.9M | ▼−9.9% Reduced · −214K sh | Q4 2025 | |
| 18 | BANK OF AMERICA CORP /DE/ | $52.4M | 1.9M | ▲+15% Added · +248K sh | Q1 2026 | |
| 19 | NORTHERN TRUST CORP | $52.4M | 1.9M | ▼−1.4% Reduced · −27K sh | Q1 2026 | |
| 20 | Duquesne Family Office LLC | $50.3M | 1.9M | ▲+7.0% Added · +123K sh | Q1 2026 | |
| 21 | MANUFACTURERS LIFE INSURANCE COMPANY, THE | $48.6M | 1.8M | ▲+2.1% Added · +37K sh | Q1 2026 | |
| 22 | Alyeska Investment Group, L.P. | $48.0M | 1.8M | ▲+47% Added · +571K sh | Q1 2026 | |
| 23 | Swedbank AB | $46.5M | 1.7M | —Held | Q1 2026 | |
| 24 | ALLIANCEBERNSTEIN L.P. | $45.6M | 1.4M | ▲+6.0% Added · +82K sh | Q1 2026 | |
| 25 | MILLENNIUM MANAGEMENT LLC | $44.2M | 1.6M | ▲+241% Added · +1.2M 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.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Feb 27, 2026 | Bavaro Michael | Chief Human Resources Officer | Sell (S) | 6K | $198K |
| Feb 27, 2026 | Pate R Carter | Director | Sell (S) | 30K | $971K |
| Feb 24, 2026 | Grashoff Christopher L. | Chief Growth Officer | Tax withholding (F) | 2K | $67K |
| Feb 24, 2026 | Whitworth Luke | Chief Operating Officer | Tax withholding (F) | 5K | $156K |
| Feb 24, 2026 | Maggio Nicole | Chief Accounting Officer | Tax withholding (F) | 975 | $33K |
| Feb 24, 2026 | Bavaro Michael | Chief Human Resources Officer | Tax withholding (F) | 1K | $46K |
| Feb 24, 2026 | RADEMACHER JOHN CHARLES | Chief Executive Officer, Director | Tax withholding (F) | 11K | $374K |
| Feb 24, 2026 | Adewunmi Femi | Chief Medical Officer | Tax withholding (F) | 2K | $55K |
| Feb 24, 2026 | Smyser Collin | GC & Corporate Secretary | Tax withholding (F) | 2K | $75K |
| Feb 22, 2026 | RADEMACHER JOHN CHARLES | Chief Executive Officer, Director | Tax withholding (F) | 133K | $4.7M |
| Feb 22, 2026 | Whitworth Luke | Chief Operating Officer | Tax withholding (F) | 24K | $858K |
| Feb 22, 2026 | Bavaro Michael | Chief Human Resources Officer | Tax withholding (F) | 12K | $436K |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 111 funds | $47.5B |
| AMAZON.COM INCAMZN | 110 funds | $36.9B |
| ALPHABET INC-CL AGOOGL | 108 funds | $31.0B |
| META PLATFORMS INC-CLASS AMETA | 108 funds | $21.3B |
| APPLE INCAAPL | 107 funds | $56.0B |
| NVIDIA CORPNVDA | 106 funds | $67.7B |
| COSTCO WHOLESALE CORPCOST | 106 funds | $8.5B |
| BROADCOM INCAVGO | 104 funds | $24.8B |
| ALPHABET INC-CL CGOOG | 104 funds | $22.8B |
| JPMORGAN CHASE & COJPM | 104 funds | $15.5B |
| ELI LILLY & COLLY | 104 funds | $12.6B |
| VISA INC-CLASS A SHARESV | 104 funds | $10.2B |
Ranked by how many of OPCH's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for OPCH. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.