PUBM
PubMatic, Inc. · Technology · Software - Application
Momentum inputs (comparable managers):
holder breadth -6.2% ·
share flow +3.8% ·
net new positions -6.7%
· formula
Concentrated accumulation: rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 1 | 0 | 15.10K | $281,991 | n/a | n/a |
| Q2 2026 | 75 | +2 | 17.46M | $228.88M | +4 | −2 |
| Q1 2026 | 75 | +5 | 16.23M | $132.84M | +8 | −3 |
| Q4 2025 | 70 | +2 | 18.22M | $161.61M | +2 | n/a |
| Q3 2025 | 15 | -1 | 13.28M | $109.96M | n/a | −1 |
| Q2 2025 | 13 | 0 | 11.64M | $144.76M | +1 | −1 |
| Q1 2025 | 10 | 0 | 4.81M | $43.92M | +1 | −1 |
| Q4 2024 | 10 | -1 | 4.49M | $65.98M | n/a | −1 |
| Q3 2024 | 10 | 0 | 3.29M | $48.87M | +2 | −2 |
| Q2 2024 | 10 | n/a | 3.01M | $61.05M | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 3.39M | -1.8% | $28.05M | 0.0% | ▼ Trim | 2 | SEC ↗ ×11 |
| 2 | The Vanguard Group ✦ (passive) | 2.50M | -4.3% | $20.69M | 0.0% | ▼ Trim | 2 | SEC ↗ ×5 |
| 3 | Wellington Management ✦ | 1.47M | +10.1% | $12.16M | 0.0% | ▲ Add | 6 | SEC ↗ ×3 |
| 4 | Renaissance Technologies ✦ | 1.36M | +11.1% | $11.22M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 5 | Geode Capital Management ✦ (passive) | 961.49K | -2.5% | $7.96M | 0.0% | ▼ Trim | 6 | SEC ↗ ×2 |
| 6 | State Street Global Advisors ✦ (passive) | 927.23K | +1.3% | $7.68M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 7 | JPMorgan Chase ✦ | 696.37K | n/a | $5.77M | 0.0% | n/c | 1 | SEC ↗ ×6 |
| 8 | D. E. Shaw & Co. ✦ | 572.48K | +60.6% | $4.74M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 9 | Two Sigma Investments ✦ | 384.90K | +146.7% | $3.19M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 10 | Citadel Advisors ✦ | 313.13K | -37.1% | $2.59M | 0.0% | ▼ Trim | 6 | SEC ↗ ×2 |
| 11 | Goldman Sachs Group ✦ | 296.50K | n/a | $2.46M | 0.0% | n/c | 1 | SEC ↗ ×2 |
| 12 | Millennium Management ✦ | 218.58K | +1067.6% | $1.81M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 13 | Morgan Stanley ✦ | 159.62K | n/a | $1.32M | 0.0% | n/c | 1 | SEC ↗ ×8 |
| 14 | T. Rowe Price ✦ | 35.31K | +3.6% | $293,000 | 0.0% | ▲ Add | 6 | SEC ↗ |
| 15 | Fidelity (FMR) ✦ | 2.83K | -1.8% | $23,390 | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| AQR Capital Management | $682,905 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 153 holders, 28.60M shares, $192.36M 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, 10% owner · 50.02K sh · $863,237
Officer · 2.60K sh · $46,240
Officer · 5.40K sh · $90,744
Officer · 22.17K sh · $413,815
Officer · 10.08K sh · $187,997
Officer, Director, 10% owner · 10.79K sh · $201,488
Officer, Director, 10% owner · 6.65K sh · $125,896
Officer, Director, 10% owner · 4.47K sh · $86,951
Officer, Director, 10% owner · 45.76K sh · $866,149
Officer, Director, 10% owner · 651 sh · $12,649
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology