AMBA
Ambarella, Inc. · Technology · Semiconductors
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2026
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 2 | +1 | 18.17K | $900,827 | +1 | n/a |
| Q2 2026 | 105 | +2 | 24.18M | $2.13B | +10 | −8 |
| Q1 2026 | 106 | +4 | 25.12M | $1.29B | +11 | −7 |
| Q4 2025 | 102 | -1 | 27.16M | $1.92B | +1 | −2 |
| Q3 2025 | 20 | +1 | 15.75M | $1.30B | +2 | −1 |
| Q2 2025 | 16 | -2 | 14.28M | $943.54M | n/a | −2 |
| Q1 2025 | 15 | 0 | 5.22M | $262.59M | +1 | −1 |
| Q4 2024 | 15 | +1 | 6.38M | $463.79M | +2 | −1 |
| Q3 2024 | 13 | 0 | 5.27M | $297.37M | n/a | n/a |
| Q2 2024 | 13 | n/a | 5.52M | $297.87M | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Wealth Enhancement Advisory… | 17.86K | +2.7% | $879,385 | 0.0% | ▲ Add | 4 | SEC ↗ |
| 2 | TD Waterhouse Canada Inc. | 305 | New | $21,442 | 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
| TD Waterhouse Canada Inc. | $21,442 | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 300 holders, 35.99M shares, $1.73B 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)
Director · 250 sh · $17,690
Officer · 1.90K sh · $127,563
Officer · 3.13K sh · $202,659
Officer · 2.89K sh · $187,553
Officer · 2.01K sh · $130,243
Officer, Director · 6.09K sh · $394,555
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology