29 tracked 13F filers disclose a position in AMPG as of the latest SEC 13F filings, a combined $7.9M in reported value. 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.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | VANGUARD CAPITAL MANAGEMENT LLC | $1.5M | 805K | →First observed position No prior filed position | Q1 2026 | |
| 2 | Creek Drive Management Group LLC | $1.4M | 736K | ▲+84% Added · +336K sh | Q1 2026 | |
| 3 | Cable Car Capital, LP | $1.0M | 531K | ▲21× Added · +506K sh | Q1 2026 | |
| 4 | Integrated Wealth Concepts LLC | $807K | 425K | ▲New +425K sh | Q1 2026 | |
| 5 | RENAISSANCE TECHNOLOGIES LLC | $708K | 373K | ▲+136% Added · +214K sh | Q1 2026 | |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | $461K | 243K | ▲+25% Added · +48K sh | Q1 2026 | |
| 7 | DIMENSIONAL FUND ADVISORS LP | $410K | 216K | ▲+157% Added · +132K sh | Q1 2026 | |
| 8 | VANGUARD FIDUCIARY TRUST CO | $211K | 111K | →First observed position No prior filed position | Q1 2026 | |
| 9 | BlackRock, Inc. | $205K | 108K | ▲+14% Added · +13K sh | Q1 2026 | |
| 10 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $201K | 106K | ▲New +106K sh | Q1 2026 | |
| 11 | STATE STREET CORP | $169K | 89K | —Held | Q1 2026 | |
| 12 | TWO SIGMA INVESTMENTS, LP | $93K | 49K | ▼−58% Reduced · −67K sh | Q1 2026 | |
| 13 | NORTHERN TRUST CORP | $88K | 47K | —Held | Q1 2026 | |
| 14 | XTX Topco Ltd | $82K | 43K | ▲+29% Added · +10K sh | Q1 2026 | |
| 15 | LPL Financial LLC | $58K | 31K | ▲New +31K sh | Q1 2026 | |
| 16 | Midwest Financial Group LLC | $201K | 29K | ▲New +29K sh | Q2 2026 | |
| 17 | UBS Group AG | $50K | 26K | ▲+7.4% Added · +2K sh | Q1 2026 | |
| 18 | CITADEL ADVISORS LLC | $39K | 20K | ▲Added Added · +20K sh | Q1 2026 | |
| 19 | SBI Securities Co., Ltd. | $39K | 20K | ▲+192% Added · +13K sh | Q1 2026 | |
| 20 | Bryn Mawr Trust Advisors, LLC | $28K | 15K | —Held | Q1 2026 | |
| 21 | MARSHALL WACE, LLP | $27K | 14K | ▼−76% Reduced · −46K sh | Q1 2026 | |
| 22 | MORGAN STANLEY | $21K | 11K | ▼−37% Reduced · −6K sh | Q1 2026 | |
| 23 | Vanguard Global Advisers, LLC | $19K | 10K | →First observed position No prior filed position | Q1 2026 | |
| 24 | OSAIC HOLDINGS, INC. | $12K | 6K | ▼−30% Reduced · −3K sh | Q1 2026 | |
| 25 | Tower Research Capital LLC (TRC) | $8K | 4K | ▲+351% Added · +3K 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.
Last quarter, 3 funds opened a new position in AMPG and 6 added to an existing one, while 2 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| NVIDIA CORPNVDA | 6 funds | $4.0B |
| AMAZON.COM INCAMZN | 6 funds | $1.9B |
| APPLE INCAAPL | 6 funds | $1.8B |
| MICROSOFT CORPMSFT | 6 funds | $1.4B |
| META PLATFORMS INC-CLASS AMETA | 6 funds | $1.2B |
| BROADCOM INCAVGO | 6 funds | $1.1B |
| ALPHABET INC-CL AGOOGL | 6 funds | $1.1B |
| TESLA INCTSLA | 6 funds | $954.8M |
| JPMORGAN CHASE & COJPM | 6 funds | $864.9M |
| ALPHABET INC-CL CGOOG | 6 funds | $845.6M |
| MASTERCARD INC - AMA | 6 funds | $678.3M |
| BERKSHIRE HATHAWAY INC-CL BBRK/B | 6 funds | $673.7M |
Ranked by how many of AMPG's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 23, 2026 | Mazziota Daniel Richard | Director | Sell (S) | 10K | $77K |
| Jun 22, 2026 | Mazziota Daniel Richard | Director | Sell (S) | 7K | $61K |
| Jun 1, 2026 | Flores Jorge Luis | Chief Operating Officer | Sell (S) | 30K | $161K |
| May 28, 2026 | Sanfratello Louisa | Chief Financial Officer, Director | Sell (S) | 50K | $240K |
| May 22, 2026 | Mazziota Daniel Richard | Director | Sell (S) | 10K | $50K |
| Dec 18, 2025 | Modi Shailesh | Director | Buy (P) | 2K | $6K |
| Jun 20, 2025 | Mazziota Daniel Richard | Director | Buy (P) | 7K | $14K |
| Apr 8, 2025 | Mazziota Daniel Richard | Director | Buy (P) | 5K | $7K |
| Oct 7, 2024 | Flores Jorge Luis | Chief Operating Officer | Buy (P) | 5K | $4K |
| Aug 30, 2024 | Maqbool Fawad | Chairman, CEO, Director, 10% Owner | Buy (P) | 8K | $6K |
| Aug 21, 2024 | Flores Jorge Luis | Chief Operating Officer | Buy (P) | 373 | $351 |
| Aug 21, 2024 | Flores Jorge Luis | Chief Operating Officer | Buy (P) | 5K | $5K |
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/AMPG/capital-change-brief"
Use Arkolith's capital_change_brief for AMPG. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for AMPG. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.