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/AMTM/capital-change-brief"
Use Arkolith's capital_change_brief for AMTM. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | AMERICAN SECURITIES LLC | $1.2B | 45.0M | —Held | Q1 2026 | |
| 2 | BlackRock, Inc. | $465.3M | 17.8M | ▲+2.2% Added · +382K sh | Q1 2026 | |
| 3 | PRIMECAP MANAGEMENT CO/CA/ | $315.2M | 12.1M | ▼−0.3% Reduced · −42K sh | Q1 2026 | |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | $204.8M | 7.9M | ▲New +7.9M sh | Q1 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $173.5M | 6.7M | ▲New +6.7M sh | Q1 2026 | |
| 6 | FMR LLC | $145.5M | 5.6M | ▼−17% Reduced · −1.1M sh | Q1 2026 | |
| 7 | STATE STREET CORP | $132.5M | 5.1M | ▲+0.3% Added · +17K sh | Q1 2026 | |
| 8 | FRONTIER CAPITAL MANAGEMENT CO LLC | $128.6M | 4.9M | ▼−15% Reduced · −843K sh | Q1 2026 | |
| 9 | DIMENSIONAL FUND ADVISORS LP | $98.8M | 3.8M | ▲+107% Added · +2.0M sh | Q1 2026 | |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | $73.4M | 2.8M | ▲+5.8% Added · +155K sh | Q1 2026 | |
| 11 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $72.6M | 2.8M | ▲+42% Added · +823K sh | Q1 2026 | |
| 12 | Focus Partners Wealth | $67.9M | 2.6M | ▼−6.8% Reduced · −190K sh | Q1 2026 | |
| 13 | BANK OF AMERICA CORP /DE/ | $62.7M | 2.4M | ▲+108% Added · +1.2M sh | Q1 2026 | |
| 14 | NORGES BANK | $66.5M | 2.3M | ▲+6.2% Added · +133K sh | Q4 2025 | |
| 15 | MORGAN STANLEY | $58.3M | 2.2M | ▲+7.7% Added · +160K sh | Q1 2026 | |
| 16 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $53.9M | 2.1M | ▲+5.9% Added · +116K sh | Q1 2026 | |
| 17 | UBS Group AG | $44.6M | 1.7M | ▲+730% Added · +1.5M sh | Q1 2026 | |
| 18 | Point72 Asset Management, L.P. | $42.5M | 1.6M | ▲+135% Added · +935K sh | Q1 2026 | |
| 19 | Ruane, Cunniff & Goldfarb L.P. | $42.3M | 1.6M | ▼−32% Reduced · −771K sh | Q1 2026 | |
| 20 | Permian Investment Partners, LP | $40.9M | 1.6M | ▲New +1.6M sh | Q1 2026 | |
| 21 | TORONTO DOMINION BANK | $40.8M | 1.6M | ▲New +1.6M sh | Q1 2026 | |
| 22 | BRIGHTLINE CAPITAL MANAGEMENT, LLC | $36.4M | 1.4M | ▲+0.3% Added · +4K sh | Q1 2026 | |
| 23 | Verition Fund Management LLC | $33.9M | 1.3M | ▲+50% Added · +433K sh | Q1 2026 | |
| 24 | VOYA INVESTMENT MANAGEMENT LLC | $31.3M | 1.2M | ▲+4.5% Added · +52K sh | Q1 2026 | |
| 25 | GOLDMAN SACHS GROUP INC | $29.5M | 1.1M | ▲+76% Added · +487K 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 |
|---|---|---|---|---|---|
| May 6, 2026 | Heller John E. | Chief Executive Officer, Director | Option exercise (M) | 18K | $0 |
| May 6, 2026 | Heller John E. | Chief Executive Officer, Director | Tax withholding (F) | 8K | $204K |
| May 6, 2026 | Heller John E. | Chief Executive Officer, Director | Option exercise (M) | 18K | — |
| May 6, 2026 | Mullen Sean Thomas | Chief Growth Officer | Option exercise (M) | 9K | $0 |
| May 6, 2026 | Mullen Sean Thomas | Chief Growth Officer | Tax withholding (F) | 3K | $69K |
| May 6, 2026 | Mullen Sean Thomas | Chief Growth Officer | Option exercise (M) | 9K | — |
| May 6, 2026 | Johnson Travis Barton | Chief Financial Officer | Option exercise (M) | 14K | $0 |
| May 6, 2026 | Johnson Travis Barton | Chief Financial Officer | Tax withholding (F) | 4K | $102K |
| May 6, 2026 | Johnson Travis Barton | Chief Financial Officer | Option exercise (M) | 14K | — |
| May 6, 2026 | Bruning Jill L | Chief Technology Officer | Option exercise (M) | 9K | $0 |
| May 6, 2026 | Bruning Jill L | Chief Technology Officer | Tax withholding (F) | 3K | $68K |
| May 6, 2026 | Bruning Jill L | Chief Technology Officer | Option exercise (M) | 9K | — |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 130 funds | $51.1B |
| META PLATFORMS INC-CLASS AMETA | 129 funds | $22.8B |
| AMAZON.COM INCAMZN | 128 funds | $42.2B |
| ELI LILLY & COLLY | 128 funds | $13.1B |
| ALPHABET INC-CL AGOOGL | 127 funds | $36.0B |
| BROADCOM INCAVGO | 127 funds | $26.3B |
| CAPITAL ONE FINANCIAL CORPCOF | 127 funds | $3.2B |
| NVIDIA CORPNVDA | 126 funds | $68.6B |
| APPLE INCAAPL | 125 funds | $60.2B |
| TESLA INCTSLA | 125 funds | $14.1B |
| MASTERCARD INC - AMA | 125 funds | $9.9B |
| MICRON TECHNOLOGY INCMU | 125 funds | $7.6B |
Ranked by how many of AMTM'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 AMTM. 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.