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 OPBK 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/OPBK"
Use Arkolith to show who owns OPBK, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | DIVERSIFY WEALTH MANAGEMENT, LLC | $26.5M | 1.8M | ▲New +1.8M sh | Q1 2026 | |
| 2 | VANGUARD GROUP INC | $9.9M | 704K | ▲+0.6% Added · +4K sh | Q4 2025 | |
| 3 | BlackRock, Inc. | $9.9M | 745K | ▼−0.3% Reduced · −2K sh | Q1 2026 | |
| 4 | ALLIANCEBERNSTEIN L.P. | $9.2M | 650K | ▼−4.7% Reduced · −32K sh | Q1 2026 | |
| 5 | DIMENSIONAL FUND ADVISORS LP | $8.5M | 636K | ▲+4.4% Added · +27K sh | Q1 2026 | |
| 6 | MANUFACTURERS LIFE INSURANCE COMPANY, THE | $7.5M | 567K | ▼−1.5% Reduced · −9K sh | Q1 2026 | |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | $7.4M | 559K | ▲New +559K sh | Q1 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $3.5M | 267K | ▼−2.9% Reduced · −8K sh | Q1 2026 | |
| 9 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $2.5M | 189K | ▼−9.4% Reduced · −20K sh | Q1 2026 | |
| 10 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $2.1M | 156K | ▲+16% Added · +22K sh | Q1 2026 | |
| 11 | Connor, Clark & Lunn Investment Management Ltd. | $2.0M | 151K | ▲+1.9% Added · +3K sh | Q1 2026 | |
| 12 | STATE STREET CORP | $2.0M | 150K | ▲+2.6% Added · +4K sh | Q1 2026 | |
| 13 | MARSHALL WACE, LLP | $1.6M | 123K | ▲+12% Added · +13K sh | Q1 2026 | |
| 14 | AMERICAN CENTURY COMPANIES INC | $1.6M | 121K | —Held | Q1 2026 | |
| 15 | RAYMOND JAMES FINANCIAL INC | $1.3M | 98K | ▼−14% Reduced · −16K sh | Q1 2026 | |
| 16 | NORTHERN TRUST CORP | $1.2M | 88K | ▲+9.1% Added · +7K sh | Q1 2026 | |
| 17 | Man Group plc | $1.1M | 86K | ▲+57% Added · +31K sh | Q1 2026 | |
| 18 | RENAISSANCE TECHNOLOGIES LLC | $1.1M | 84K | ▼−14% Reduced · −14K sh | Q1 2026 | |
| 19 | GOLDMAN SACHS GROUP INC | $1.1M | 84K | ▲+38% Added · +23K sh | Q1 2026 | |
| 20 | Squarepoint Ops LLC | $1.0M | 78K | ▲+67% Added · +31K sh | Q1 2026 | |
| 21 | VANGUARD FIDUCIARY TRUST CO | $986K | 74K | ▲New +74K sh | Q1 2026 | |
| 22 | PRUDENTIAL FINANCIAL INC | $975K | 73K | ▲+14% Added · +9K sh | Q1 2026 | |
| 23 | VANGUARD PORTFOLIO MANAGEMENT LLC | $908K | 68K | ▲New +68K sh | Q1 2026 | |
| 24 | Empowered Funds, LLC | $833K | 63K | ▲+9.3% Added · +5K sh | Q1 2026 | |
| 25 | Bank of New York Mellon Corp | $830K | 62K | ▼−6.7% Reduced · −4K 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 |
|---|---|---|---|---|---|
| Jun 12, 2026 | Oh Christine Yoon | Chief Operating Officer | Sell (S) | 2K | $22K |
| Jun 11, 2026 | Oh Christine Yoon | Chief Operating Officer | Sell (S) | 8K | $116K |
| Jun 10, 2026 | Oh Christine Yoon | Chief Operating Officer | Sell (S) | 12K | $172K |
| Jun 8, 2026 | Park Jae H. | Chief Risk Officer | Tax withholding (F) | 1K | $18K |
| Jun 8, 2026 | Park Jae H. | Chief Risk Officer | Option exercise (M) | 4K | — |
| Jun 8, 2026 | Park Jae H. | Chief Risk Officer | Option exercise (M) | 4K | $0 |
| Mar 12, 2026 | Park Jaehyun | Chief Financial Officer | Sell (S) | 958 | $12K |
| Mar 3, 2026 | Won Wesley | Chief Technology Officer | Option exercise (M) | 1K | $0 |
| Mar 3, 2026 | Park Jaehyun | Chief Financial Officer | Option exercise (M) | 2K | — |
| Mar 3, 2026 | Park Jaehyun | Chief Financial Officer | Tax withholding (F) | 577 | $8K |
| Mar 3, 2026 | Park Jaehyun | Chief Financial Officer | Option exercise (M) | 2K | $0 |
| Mar 3, 2026 | Won Wesley | Chief Technology Officer | Tax withholding (F) | 542 | $7K |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 27 funds | $10.6B |
| AMAZON.COM INCAMZN | 27 funds | $8.0B |
| META PLATFORMS INC-CLASS AMETA | 27 funds | $4.4B |
| BERKSHIRE HATHAWAY INC-CL BBRK/B | 27 funds | $3.7B |
| JPMORGAN CHASE & COJPM | 27 funds | $3.5B |
| CHEVRON CORPCVX | 27 funds | $1.9B |
| TJX COMPANIES INCTJX | 27 funds | $914.5M |
| MCKESSON CORPMCK | 27 funds | $787.3M |
| ARISTA NETWORKS INCANET | 27 funds | $665.7M |
| NVIDIA CORPNVDA | 26 funds | $15.8B |
| APPLE INCAAPL | 26 funds | $14.1B |
| ALPHABET INC-CL CGOOG | 26 funds | $6.4B |
Ranked by how many of OPBK'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 OPBK. 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.