89 tracked 13F filers disclose a position in AMBQ as of the latest SEC 13F filings, a combined $237.3M 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 | T. Rowe Price Investment Management, Inc. | Withheld | 1.3M | ▲New +1.3M sh | Q1 2026 | |
| 2 | BlackRock, Inc. | $25.7M | 1.0M | ▲+229% Added · +705K sh | Q1 2026 | |
| 3 | Atreides Management, LP | $21.9M | 862K | ▲+24% Added · +166K sh | Q1 2026 | |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | $18.0M | 707K | →First observed position No prior filed position | Q1 2026 | |
| 5 | ALLIANCEBERNSTEIN L.P. | $19.6M | 686K | ▲+74% Added · +291K sh | Q1 2026 | |
| 6 | Schonfeld Strategic Advisors LLC | $16.7M | 657K | ▲+196% Added · +435K sh | Q1 2026 | |
| 7 | FRANKLIN RESOURCES INC | $13.8M | 542K | ▲+76% Added · +234K sh | Q1 2026 | |
| 8 | GOLDMAN SACHS GROUP INC | $10.5M | 413K | ▲+213% Added · +281K sh | Q1 2026 | |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | $7.6M | 298K | ▲+186% Added · +193K sh | Q1 2026 | |
| 10 | SILVERCREST ASSET MANAGEMENT GROUP LLC | $7.2M | 282K | ▲+50% Added · +94K sh | Q1 2026 | |
| 11 | First Eagle Investment Management, LLC | $7.1M | 279K | ▲+47% Added · +89K sh | Q1 2026 | |
| 12 | STATE STREET CORP | $6.6M | 260K | ▲+208% Added · +176K sh | Q1 2026 | |
| 13 | Polar Asset Management Partners Inc. | $5.1M | 201K | ▲+672% Added · +175K sh | Q1 2026 | |
| 14 | NEEDHAM INVESTMENT MANAGEMENT LLC | $5.1M | 200K | ▲New +200K sh | Q1 2026 | |
| 15 | S SQUARED TECHNOLOGY, LLC | $4.9M | 193K | ▲New +193K sh | Q1 2026 | |
| 16 | MILLENNIUM MANAGEMENT LLC | $4.5M | 178K | ▲+186% Added · +116K sh | Q1 2026 | |
| 17 | UBS Group AG | $4.2M | 166K | ▲+363% Added · +130K sh | Q1 2026 | |
| 18 | VANGUARD PORTFOLIO MANAGEMENT LLC | $4.0M | 159K | →First observed position No prior filed position | Q1 2026 | |
| 19 | SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | $4.0M | 156K | ▲+26% Added · +32K sh | Q1 2026 | |
| 20 | NORTHERN TRUST CORP | $2.8M | 111K | ▲+446% Added · +91K sh | Q1 2026 | |
| 21 | GILDER GAGNON HOWE & CO LLC | $2.8M | 110K | ▲+17% Added · +16K sh | Q1 2026 | |
| 22 | LOS ANGELES CAPITAL MANAGEMENT LLC | $2.4M | 93K | ▲11× Added · +84K sh | Q1 2026 | |
| 23 | WASATCH ADVISORS LP | $7.2M | 82K | ▼−68% Reduced · −173K sh | Q2 2026 | |
| 24 | MOODY ALDRICH PARTNERS LLC | $7.2M | 81K | ▲New +81K sh | Q2 2026 | |
| 25 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $2.1M | 81K | ▲+140% Added · +47K 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, 22 funds opened a new position in AMBQ and 21 added to an existing one, while 5 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 |
|---|---|---|
| MICROSOFT CORPMSFT | 31 funds | $6.3B |
| NVIDIA CORPNVDA | 30 funds | $10.1B |
| AMAZON.COM INCAMZN | 28 funds | $5.8B |
| MICRON TECHNOLOGY INCMU | 28 funds | $2.1B |
| APPLE INCAAPL | 27 funds | $6.9B |
| TESLA INCTSLA | 27 funds | $2.2B |
| NETFLIX INCNFLX | 27 funds | $1.1B |
| META PLATFORMS INC-CLASS AMETA | 26 funds | $4.8B |
| ALPHABET INC-CL AGOOGL | 26 funds | $3.7B |
| LAM RESEARCH CORPLRCX | 26 funds | $731.7M |
| INTEL CORPINTC | 26 funds | $612.3M |
| BOSTON SCIENTIFIC CORPBSX | 26 funds | $592.1M |
Ranked by how many of AMBQ's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| May 27, 2026 | Chen Timothy | Director | Sell (S) | 3K | $266K |
| May 27, 2026 | Chen Timothy | Director | Sell (S) | 21K | $1.7M |
| May 27, 2026 | Chen Timothy | Director | Sell (S) | 24K | $1.9M |
| May 27, 2026 | Chen Timothy | Director | Sell (S) | 22K | $1.8M |
| May 15, 2026 | Chen Sean Chihhsiang | President and COO | Sell (S) | 32K | $2.3M |
| May 15, 2026 | Chen Sean Chihhsiang | President and COO | Sell (S) | 23K | $1.7M |
| May 14, 2026 | Winzeler Jeffrey G | Chief Financial Officer | Sell (S) | 26K | $1.8M |
| May 14, 2026 | Winzeler Jeffrey G | Chief Financial Officer | Sell (S) | 82 | $6K |
| May 14, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Sell (S) | 4K | $268K |
| May 14, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Sell (S) | 6K | $425K |
| May 14, 2026 | Hanson Scott McLean | Chief Technology Officer, Director | Sell (S) | 200 | $14K |
| May 14, 2026 | Esaka Fumihide | Chief Executive Officer, Director | Sell (S) | 60K | $4.2M |
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/AMBQ/capital-change-brief"
Use Arkolith's capital_change_brief for AMBQ. 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 AMBQ. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.