This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/REX/capital-change-brief"
Use Arkolith's capital_change_brief for REX. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $250.3M | 5.5M | ▼−0.1% Reduced · −5K sh | Q1 2026 | |
| 2 | DIMENSIONAL FUND ADVISORS LP | $86.4M | 1.9M | ▼−3.5% Reduced · −68K sh | Q1 2026 | |
| 3 | RENAISSANCE TECHNOLOGIES LLC | $69.4M | 1.5M | ▼−4.5% Reduced · −72K sh | Q1 2026 | |
| 4 | STATE STREET CORP | $66.2M | 1.5M | ▲+8.2% Added · +110K sh | Q1 2026 | |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | $57.1M | 1.3M | ▲New +1.3M sh | Q1 2026 | |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | $55.8M | 1.2M | ▲New +1.2M sh | Q1 2026 | |
| 7 | SYSTEMATIC FINANCIAL MANAGEMENT LP | $50.5M | 1.1M | ▼−6.6% Reduced · −78K sh | Q1 2026 | |
| 8 | MANGROVE PARTNERS IM, LLC | $46.3M | 1.0M | —Held | Q1 2026 | |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | $38.1M | 836K | ▲+20% Added · +140K sh | Q1 2026 | |
| 10 | D. E. Shaw & Co., Inc. | $29.3M | 644K | ▲+2.8% Added · +17K sh | Q1 2026 | |
| 11 | AMERICAN CENTURY COMPANIES INC | $27.2M | 597K | ▼−15% Reduced · −108K sh | Q1 2026 | |
| 12 | MORGAN STANLEY | $25.1M | 551K | ▼−4.6% Reduced · −27K sh | Q1 2026 | |
| 13 | BROWN ADVISORY INC | $23.3M | 512K | ▼−45% Reduced · −413K sh | Q1 2026 | |
| 14 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $20.4M | 448K | ▲+6.4% Added · +27K sh | Q1 2026 | |
| 15 | NORTHERN TRUST CORP | $20.4M | 447K | ▲+18% Added · +67K sh | Q1 2026 | |
| 16 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $20.3M | 446K | ▼−5.8% Reduced · −28K sh | Q1 2026 | |
| 17 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $14.4M | 317K | ▼−8.2% Reduced · −28K sh | Q1 2026 | |
| 18 | HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | $13.7M | 301K | ▼−28% Reduced · −120K sh | Q1 2026 | |
| 19 | Nuveen, LLC | $11.6M | 254K | ▼−6.1% Reduced · −17K sh | Q1 2026 | |
| 20 | GOLDMAN SACHS GROUP INC | $10.9M | 240K | ▼−6.4% Reduced · −16K sh | Q1 2026 | |
| 21 | UniSuper Management Pty Ltd | $9.2M | 203K | —Held | Q1 2026 | |
| 22 | Bank of New York Mellon Corp | $8.8M | 192K | ▼−3.6% Reduced · −7K sh | Q1 2026 | |
| 23 | VANGUARD FIDUCIARY TRUST CO | $8.5M | 187K | ▲New +187K sh | Q1 2026 | |
| 24 | Qube Research & Technologies Ltd | $8.2M | 179K | ▼−16% Reduced · −34K sh | Q1 2026 | |
| 25 | AQR CAPITAL MANAGEMENT LLC | $7.9M | 173K | ▲+20% Added · +29K 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 18, 2026 | ROSE STUART A | Executive COB, Director | Sell (S) | 15K | $663K |
| Jun 17, 2026 | ROSE STUART A | Executive COB, Director | Sell (S) | 69K | $3.0M |
| Jun 15, 2026 | ROSE STUART A | Executive COB, Director | Grant (A) | 23K | $0 |
| Jun 15, 2026 | ROSE STUART A | Executive COB, Director | Grant (A) | 29K | $0 |
| Jun 15, 2026 | ROSE STUART A | Executive COB, Director | Tax withholding (F) | 19K | $825K |
| Jun 15, 2026 | Rizvi Zafar A | CEO, President, Director | Grant (A) | 42K | $0 |
| Jun 15, 2026 | Rizvi Zafar A | CEO, President, Director | Grant (A) | 71K | $0 |
| Jun 15, 2026 | Rizvi Zafar A | CEO, President, Director | Tax withholding (F) | 14K | $595K |
| Jun 15, 2026 | BRUGGEMAN DOUGLAS | CFO, VP-Finance, Treasurer | Grant (A) | 21K | $0 |
| Jun 15, 2026 | BRUGGEMAN DOUGLAS | CFO, VP-Finance, Treasurer | Grant (A) | 29K | $0 |
| Jun 15, 2026 | Bustos Cheryl Lea | Director | Grant (A) | 2K | $0 |
| Jun 15, 2026 | Bustos Cheryl Lea | Director | Grant (A) | 2K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 67 funds | $32.1B |
| BROADCOM INCAVGO | 65 funds | $17.8B |
| ELI LILLY & COLLY | 65 funds | $8.1B |
| COSTCO WHOLESALE CORPCOST | 65 funds | $5.3B |
| LAM RESEARCH CORPLRCX | 65 funds | $4.0B |
| AUTOMATIC DATA PROCESSINGADP | 65 funds | $1.2B |
| APPLE INCAAPL | 64 funds | $36.8B |
| AMAZON.COM INCAMZN | 64 funds | $22.8B |
| META PLATFORMS INC-CLASS AMETA | 64 funds | $14.4B |
| MICRON TECHNOLOGY INCMU | 64 funds | $7.2B |
| VISA INC-CLASS A SHARESV | 64 funds | $6.2B |
| NETFLIX INCNFLX | 64 funds | $3.9B |
Ranked by how many of REX'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 REX. 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.