AMBQ
Ambiq Micro, Inc. · Technology · Semiconductors
Momentum inputs (comparable managers):
holder breadth +30.0% ·
share flow +30.0% ·
net new positions +20.0%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 72 | +30 | 20.90M | $897.45M | +31 | −1 |
| Q1 2026 | 44 | +8 | 5.41M | $139.41M | +11 | −4 |
| Q4 2025 | 37 | -1 | 2.33M | $66.28M | +2 | −2 |
| Q3 2025 | 11 | +8 | 986.65K | $29.52M | +8 | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | The Vanguard Group ✦ (passive) | 307.84K | New | $9.21M | 0.0% | New | 1 | SEC ↗ |
| 2 | The Vanguard Group ✦ (passive) | 307.84K | New | $9.21M | 0.0% | New | 1 | SEC ↗ |
| 3 | The Vanguard Group ✦ (passive) | 307.84K | New | $9.21M | 0.0% | New | 1 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 291.88K | New | $8.73M | 0.0% | New | 1 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 291.88K | New | $8.73M | 0.0% | New | 1 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 291.88K | New | $8.73M | 0.0% | New | 1 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 291.88K | New | $8.73M | 0.0% | New | 1 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 291.88K | New | $8.73M | 0.0% | New | 1 | SEC ↗ |
| 9 | Goldman Sachs Group ✦ | 121.40K | — | $3.63M | 0.0% | n/c | 1 | SEC ↗ |
| 10 | Goldman Sachs Group ✦ | 121.40K | — | $3.63M | 0.0% | n/c | 1 | SEC ↗ |
| 11 | Geode Capital Management ✦ (passive) | 98.03K | New | $2.93M | 0.0% | New | 1 | SEC ↗ |
| 12 | Geode Capital Management ✦ (passive) | 98.03K | New | $2.93M | 0.0% | New | 1 | SEC ↗ |
| 13 | State Street Global Advisors ✦ (passive) | 72.30K | New | $2.16M | 0.0% | New | 1 | SEC ↗ |
| 14 | Citadel Advisors ✦ | 60.00K | New | $1.80M | 0.0% | New | 1 | SEC ↗ |
| 15 | D. E. Shaw & Co. ✦ | 15.17K | New | $453,856 | 0.0% | New | 1 | SEC ↗ |
| 16 | Morgan Stanley ✦ | 8.71K | — | $260,634 | 0.0% | n/c | 1 | SEC ↗ |
| 17 | Morgan Stanley ✦ | 8.71K | — | $260,634 | 0.0% | n/c | 1 | SEC ↗ |
| 18 | Morgan Stanley ✦ | 8.71K | — | $260,634 | 0.0% | n/c | 1 | SEC ↗ |
| 19 | Morgan Stanley ✦ | 8.71K | — | $260,634 | 0.0% | n/c | 1 | SEC ↗ |
| 20 | Morgan Stanley ✦ | 8.71K | — | $260,634 | 0.0% | n/c | 1 | SEC ↗ |
| 21 | Morgan Stanley ✦ | 8.71K | — | $260,634 | 0.0% | n/c | 1 | SEC ↗ |
| 22 | Two Sigma Investments ✦ | 7.47K | New | $223,383 | 0.0% | New | 1 | SEC ↗ |
| 23 | JPMorgan Chase ✦ | 3.75K | — | $112,320 | 0.0% | n/c | 1 | SEC ↗ |
| 24 | JPMorgan Chase ✦ | 3.75K | — | $112,320 | 0.0% | n/c | 1 | SEC ↗ |
| 25 | Fidelity (FMR) ✦ | 111 | New | $3,321 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| The Vanguard Group | $9.21M | 0.0% |
| The Vanguard Group | $9.21M | 0.0% |
| The Vanguard Group | $9.21M | 0.0% |
| BlackRock | $8.73M | 0.0% |
| BlackRock | $8.73M | 0.0% |
| BlackRock | $8.73M | 0.0% |
| BlackRock | $8.73M | 0.0% |
| BlackRock | $8.73M | 0.0% |
| Geode Capital Management | $2.93M | 0.0% |
| Geode Capital Management | $2.93M | 0.0% |
| State Street Global Advisors | $2.16M | 0.0% |
| Citadel Advisors | $1.80M | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 96 holders, 10.92M shares, $247.14M reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer, Director · 800 sh · $50,605
Officer, Director · 5.40K sh · $347,793
Officer, Director · 800 sh · $52,241
Officer, Director · 1.28K sh · $81,132
Officer, Director · 10.72K sh · $690,201
Officer, Director · 1.50K sh · $97,893
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology