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 OIS 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/OIS"
Use Arkolith to show who owns OIS, 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. | $73.4M | 6.3M | ▼−5.2% Reduced · −348K sh | Q1 2026 | |
| 2 | DIMENSIONAL FUND ADVISORS LP | $41.0M | 3.5M | ▲+2.6% Added · +89K sh | Q1 2026 | |
| 3 | VANGUARD GROUP INC | $30.3M | 4.5M | ▼−0.4% Reduced · −18K sh | Q4 2025 | |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | $28.1M | 2.4M | ▲New +2.4M sh | Q1 2026 | |
| 5 | D. E. Shaw & Co., Inc. | $25.2M | 2.2M | ▼−18% Reduced · −482K sh | Q1 2026 | |
| 6 | First Eagle Investment Management, LLC | $23.8M | 2.0M | ▼−21% Reduced · −538K sh | Q1 2026 | |
| 7 | AMERICAN CENTURY COMPANIES INC | $21.5M | 1.8M | ▲+14% Added · +233K sh | Q1 2026 | |
| 8 | AQR CAPITAL MANAGEMENT LLC | $21.2M | 1.8M | ▲+2.5% Added · +44K sh | Q1 2026 | |
| 9 | STATE STREET CORP | $20.2M | 1.7M | ▲+20% Added · +284K sh | Q1 2026 | |
| 10 | VANGUARD PORTFOLIO MANAGEMENT LLC | $19.1M | 1.6M | ▲New +1.6M sh | Q1 2026 | |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | $15.8M | 1.4M | ▲+2.6% Added · +35K sh | Q1 2026 | |
| 12 | MORGAN STANLEY | $15.7M | 1.4M | ▲+38% Added · +368K sh | Q1 2026 | |
| 13 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $13.2M | 1.1M | ▼−1.3% Reduced · −15K sh | Q1 2026 | |
| 14 | KENNEDY CAPITAL MANAGEMENT LLC | $12.6M | 1.1M | ▼−26% Reduced · −374K sh | Q1 2026 | |
| 15 | TWO SIGMA INVESTMENTS, LP | $12.5M | 1.1M | ▲+80% Added · +476K sh | Q1 2026 | |
| 16 | HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | $11.7M | 1.0M | ▼−41% Reduced · −703K sh | Q1 2026 | |
| 17 | MARSHALL WACE, LLP | $10.9M | 933K | ▲New +933K sh | Q1 2026 | |
| 18 | UBS Group AG | $9.9M | 853K | ▲+67% Added · +344K sh | Q1 2026 | |
| 19 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $9.7M | 833K | ▼−8.8% Reduced · −80K sh | Q1 2026 | |
| 20 | JPMORGAN CHASE & CO | $9.5M | 822K | ▼−24% Reduced · −266K sh | Q1 2026 | |
| 21 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $8.4M | 721K | ▲+69% Added · +296K sh | Q1 2026 | |
| 22 | MILLENNIUM MANAGEMENT LLC | $8.2M | 704K | ▲57× Added · +692K sh | Q1 2026 | |
| 23 | GOLDMAN SACHS GROUP INC | $8.2M | 702K | ▲+44% Added · +216K sh | Q1 2026 | |
| 24 | Trexquant Investment LP | $6.4M | 551K | ▲+71% Added · +229K sh | Q1 2026 | |
| 25 | PANAGORA ASSET MANAGEMENT INC | $6.3M | 540K | ▼−19% Reduced · −128K 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 20, 2026 | TAYLOR CINDY B | President & CEO, Director | Tax withholding (F) | 42K | $527K |
| Feb 20, 2026 | Moses Philip Scott | EVP, Chief Operating Officer | Tax withholding (F) | 15K | $191K |
| Feb 20, 2026 | Taylor Brian E. | Sr. VP, Controller & CAO | Tax withholding (F) | 10K | $124K |
| Feb 20, 2026 | HAJDIK LLOYD A | Executive VP, CFO & Treasurer | Tax withholding (F) | 16K | $206K |
| Feb 19, 2026 | HAJDIK LLOYD A | Executive VP, CFO & Treasurer | Grant (A) | 63K | $0 |
| Feb 19, 2026 | TAYLOR CINDY B | President & CEO, Director | Grant (A) | 160K | $0 |
| Feb 19, 2026 | Moses Philip Scott | EVP, Chief Operating Officer | Grant (A) | 63K | $0 |
| Feb 19, 2026 | Taylor Brian E. | Sr. VP, Controller & CAO | Grant (A) | 38K | $0 |
| Feb 18, 2026 | TAYLOR CINDY B | President & CEO, Director | Grant (A) | 82K | $0 |
| Feb 18, 2026 | HAJDIK LLOYD A | Executive VP, CFO & Treasurer | Grant (A) | 28K | $0 |
| Feb 18, 2026 | HAJDIK LLOYD A | Executive VP, CFO & Treasurer | Tax withholding (F) | 12K | $114K |
| Feb 18, 2026 | TAYLOR CINDY B | President & CEO, Director | Tax withholding (F) | 35K | $327K |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 62 funds | $23.7B |
| META PLATFORMS INC-CLASS AMETA | 61 funds | $12.7B |
| ALPHABET INC-CL AGOOGL | 60 funds | $15.7B |
| BROADCOM INCAVGO | 60 funds | $12.8B |
| MICRON TECHNOLOGY INCMU | 60 funds | $5.2B |
| UNITEDHEALTH GROUP INCUNH | 60 funds | $2.9B |
| CUMMINS INCCMI | 60 funds | $1.9B |
| AUTOMATIC DATA PROCESSINGADP | 60 funds | $1.4B |
| AMAZON.COM INCAMZN | 59 funds | $17.9B |
| ELI LILLY & COLLY | 59 funds | $5.7B |
| COSTCO WHOLESALE CORPCOST | 59 funds | $4.7B |
| BANK OF AMERICA CORPBAC | 59 funds | $3.0B |
Ranked by how many of OIS'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 OIS. 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.