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 RBKB 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/RBKB"
Use Arkolith to show who owns RBKB, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | ALLIANCEBERNSTEIN L.P. | $4.6M | 387K | ▲+3.0% Added · +11K sh | Q1 2026 | |
| 2 | VANGUARD GROUP INC | $2.9M | 238K | ▲+0.9% Added · +2K sh | Q4 2025 | |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | $2.8M | 184K | ▲New +184K sh | Q1 2026 | |
| 4 | BlackRock, Inc. | $2.6M | 169K | ▲+13% Added · +20K sh | Q1 2026 | |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | $1.4M | 94K | ▲+1.3% Added · +1K sh | Q1 2026 | |
| 6 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $1.2M | 75K | ▲+2.6% Added · +2K sh | Q1 2026 | |
| 7 | Empowered Funds, LLC | $919K | 60K | ▲New +60K sh | Q1 2026 | |
| 8 | STATE STREET CORP | $478K | 31K | ▲+3.7% Added · +1K sh | Q1 2026 | |
| 9 | NORTHERN TRUST CORP | $473K | 31K | ▼−3.3% Reduced · −1K sh | Q1 2026 | |
| 10 | DIMENSIONAL FUND ADVISORS LP | $461K | 30K | ▲~0% Added · +2 sh | Q1 2026 | |
| 11 | VANGUARD FIDUCIARY TRUST CO | $402K | 26K | ▲New +26K sh | Q1 2026 | |
| 12 | VANGUARD PORTFOLIO MANAGEMENT LLC | $397K | 26K | ▲New +26K sh | Q1 2026 | |
| 13 | RENAISSANCE TECHNOLOGIES LLC | $375K | 24K | ▲+15% Added · +3K sh | Q1 2026 | |
| 14 | Cerity Partners LLC | $309K | 20K | ▼~0% Reduced · −4 sh | Q1 2026 | |
| 15 | AE Wealth Management LLC | $234K | 15K | ▲+17% Added · +2K sh | Q1 2026 | |
| 16 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $175K | 11K | —Held | Q1 2026 | |
| 17 | MORGAN STANLEY | $128K | 8K | ▼−4.2% Reduced · −366 sh | Q1 2026 | |
| 18 | DEUTSCHE BANK AG\ | $125K | 8K | ▲New +8K sh | Q1 2026 | |
| 19 | NEW YORK STATE COMMON RETIREMENT FUND | $85K | 6K | ▼−22% Reduced · −2K sh | Q1 2026 | |
| 20 | RHUMBLINE ADVISERS | $77K | 5K | ▲+0.8% Added · +41 sh | Q1 2026 | |
| 21 | UBS Group AG | $57K | 4K | ▲+26% Added · +755 sh | Q1 2026 | |
| 22 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $34K | 2K | ▲+1.6% Added · +35 sh | Q1 2026 | |
| 23 | JPMORGAN CHASE & CO | $28K | 2K | ▲+1.7% Added · +31 sh | Q1 2026 | |
| 24 | WELLS FARGO & COMPANY/MN | $26K | 2K | ▼−66% Reduced · −3K sh | Q1 2026 | |
| 25 | Russell Investments Group, Ltd. | $22K | 1K | ▲+7.1% Added · +97 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 |
|---|---|---|---|---|---|
| Dec 3, 2025 | Bronzi Philip J | Chief Lending Officer | Sell (S) | 3K | $38K |
| Dec 3, 2025 | Bronzi Philip J | Chief Lending Officer | Sell (S) | 2K | $17K |
| Dec 3, 2025 | Bronzi Philip J | Chief Lending Officer | Sell (S) | 100 | $1K |
| Nov 6, 2025 | Nihill Kevin M | CFO and Treasurer | Buy (P) | 1K | $10K |
| Sep 9, 2025 | Quinn Michael J. | President & CEO, Director | Tax withholding (F) | 56K | $723K |
| Sep 9, 2025 | Quinn Michael J. | President & CEO, Director | Option exercise (M) | 95K | $0 |
| Sep 9, 2025 | Quinn Michael J. | President & CEO, Director | Option exercise (M) | 95K | $625K |
| Aug 29, 2025 | McCardle James T. III | Chief Credit Officer | Sell (S) | 4K | $56K |
| Aug 12, 2025 | McCardle James T. III | Chief Credit Officer | Sell (S) | 685 | $9K |
| Jul 9, 2025 | Nihill Kevin M | CFO and Treasurer | Tax withholding (F) | 1K | $18K |
| Feb 13, 2025 | Nihill Kevin M | CFO and Treasurer | Buy (P) | 1K | $10K |
| Dec 6, 2024 | Dwyer Francis X. | President of Subsidiary | Option exercise (M) | 22K | $145K |
| Company | Co-held by | Combined value |
|---|---|---|
| APPLE INCAAPL | 7 funds | $1.7B |
| NVIDIA CORPNVDA | 7 funds | $1.4B |
| MICROSOFT CORPMSFT | 7 funds | $1.2B |
| AMAZON.COM INCAMZN | 7 funds | $817.8M |
| ALPHABET INC-CL AGOOGL | 7 funds | $687.9M |
| BROADCOM INCAVGO | 7 funds | $578.9M |
| ALPHABET INC-CL CGOOG | 7 funds | $487.9M |
| JPMORGAN CHASE & COJPM | 7 funds | $448.4M |
| BERKSHIRE HATHAWAY INC-CL BBRK/B | 7 funds | $436.6M |
| META PLATFORMS INC-CLASS AMETA | 7 funds | $381.7M |
| JOHNSON & JOHNSONJNJ | 7 funds | $372.0M |
| EXXON MOBIL CORPXOM | 7 funds | $344.3M |
Ranked by how many of RBKB'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 RBKB. 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.