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 SPOK 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/SPOK"
Use Arkolith to show who owns SPOK, 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. | $18.3M | 1.7M | ▼−6.8% Reduced · −123K sh | Q1 2026 | |
| 2 | VANGUARD GROUP INC | $16.2M | 1.2M | ▲+6.4% Added · +74K sh | Q4 2025 | |
| 3 | RENAISSANCE TECHNOLOGIES LLC | $13.8M | 1.3M | ▲+1.2% Added · +15K sh | Q1 2026 | |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | $9.4M | 860K | ▲New +860K sh | Q1 2026 | |
| 5 | DIMENSIONAL FUND ADVISORS LP | $7.8M | 716K | ▲+1.7% Added · +12K sh | Q1 2026 | |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | $5.9M | 546K | ▼−8.8% Reduced · −53K sh | Q1 2026 | |
| 7 | STATE STREET CORP | $5.0M | 462K | ▲+3.3% Added · +15K sh | Q1 2026 | |
| 8 | HighTower Advisors, LLC | $4.2M | 382K | ▼−0.1% Reduced · −560 sh | Q1 2026 | |
| 9 | VANGUARD PORTFOLIO MANAGEMENT LLC | $2.9M | 265K | ▲New +265K sh | Q1 2026 | |
| 10 | GOLDMAN SACHS GROUP INC | $2.4M | 220K | ▼−39% Reduced · −143K sh | Q1 2026 | |
| 11 | Bank of New York Mellon Corp | $2.4M | 218K | ▲+2.3% Added · +5K sh | Q1 2026 | |
| 12 | NORTHERN TRUST CORP | $2.4M | 217K | ▼−0.3% Reduced · −551 sh | Q1 2026 | |
| 13 | Qube Research & Technologies Ltd | $1.9M | 172K | ▼−3.4% Reduced · −6K sh | Q1 2026 | |
| 14 | MORGAN STANLEY | $1.7M | 160K | ▼−10% Reduced · −18K sh | Q1 2026 | |
| 15 | Connor, Clark & Lunn Investment Management Ltd. | $1.6M | 145K | ▼−26% Reduced · −52K sh | Q1 2026 | |
| 16 | VANGUARD FIDUCIARY TRUST CO | $1.4M | 129K | ▲New +129K sh | Q1 2026 | |
| 17 | Trexquant Investment LP | $1.4M | 129K | ▼−24% Reduced · −42K sh | Q1 2026 | |
| 18 | JACOBS LEVY EQUITY MANAGEMENT, INC | $1.3M | 117K | ▼−1.8% Reduced · −2K sh | Q1 2026 | |
| 19 | MARSHALL WACE, LLP | $1.2M | 113K | ▲New +113K sh | Q1 2026 | |
| 20 | UNITED CAPITAL FINANCIAL ADVISORS, LLC | $1.1M | 105K | ▲New +105K sh | Q1 2026 | |
| 21 | Point72 Asset Management, L.P. | $977K | 90K | ▲+379% Added · +71K sh | Q1 2026 | |
| 22 | D. E. Shaw & Co., Inc. | $975K | 89K | ▲+27% Added · +19K sh | Q1 2026 | |
| 23 | JANE STREET GROUP, LLC | $943K | 87K | ▲+529% Added · +73K sh | Q1 2026 | |
| 24 | PANAGORA ASSET MANAGEMENT INC | $853K | 78K | ▼−16% Reduced · −15K sh | Q1 2026 | |
| 25 | Nuveen, LLC | $799K | 73K | ▲+0.7% Added · +518 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 |
|---|---|---|---|---|---|
| Mar 4, 2026 | WALLACE MICHAEL W | Chief Operating Officer | Option exercise (M) | 31K | $371K |
| Mar 4, 2026 | KELLY VINCENT D | President & CEO, Director | Grant (A) | 15K | $178K |
| Mar 4, 2026 | KELLY VINCENT D | President & CEO, Director | Tax withholding (F) | 29K | $348K |
| Mar 4, 2026 | KELLY VINCENT D | President & CEO, Director | Option exercise (M) | 49K | $593K |
| Mar 4, 2026 | KELLY VINCENT D | President & CEO, Director | Option exercise (M) | 49K | $0 |
| Mar 4, 2026 | Woods-Keisling Sharon | Corporate Secretary, Treasurer | Tax withholding (F) | 4K | $54K |
| Mar 4, 2026 | Woods-Keisling Sharon | Corporate Secretary, Treasurer | Grant (A) | 3K | $42K |
| Mar 4, 2026 | Woods-Keisling Sharon | Corporate Secretary, Treasurer | Option exercise (M) | 11K | $139K |
| Mar 4, 2026 | Woods-Keisling Sharon | Corporate Secretary, Treasurer | Option exercise (M) | 11K | $0 |
| Mar 4, 2026 | Rice Calvin | Chief Financial Officer & CAO | Option exercise (M) | 14K | $167K |
| Mar 4, 2026 | Rice Calvin | Chief Financial Officer & CAO | Tax withholding (F) | 9K | $106K |
| Mar 4, 2026 | Rice Calvin | Chief Financial Officer & CAO | Grant (A) | 4K | $50K |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 44 funds | $18.8B |
| AMAZON.COM INCAMZN | 44 funds | $14.9B |
| ELI LILLY & COLLY | 44 funds | $5.3B |
| COSTCO WHOLESALE CORPCOST | 44 funds | $4.1B |
| BRISTOL-MYERS SQUIBB COBMY | 44 funds | $1.4B |
| APPLE INCAAPL | 43 funds | $23.8B |
| BROADCOM INCAVGO | 43 funds | $10.6B |
| META PLATFORMS INC-CLASS AMETA | 43 funds | $10.0B |
| TESLA INCTSLA | 43 funds | $5.1B |
| LAM RESEARCH CORPLRCX | 43 funds | $3.6B |
| NETFLIX INCNFLX | 43 funds | $2.6B |
| TJX COMPANIES INCTJX | 43 funds | $2.1B |
Ranked by how many of SPOK'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 SPOK. 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.