PUBM · Insider trading · 13F holders · Congress trades
PubMatic, Inc. (PUBM)
Who is buying and selling PUBM: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 6
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $10.9M
- Congress trades, 12 months
- 0
PUBM at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 6 PUBM insiders filed 22 sales worth $10.9M on SEC Form 4, and no open-market purchases; 16 of the sales were pre-planned under Rule 10b5-1.
- 6 13F filers hold PUBM among their 50 largest positions, worth $38.2M combined. The biggest bets by portfolio weight are Simcoe Capital LLC (5.5%), Whitefort Capital Management, LP (3.7%) and S Squared Technology, LLC (3.0%). In their latest 13Fs, 0 managers opened a new position and 3 added to one.
- No member of Congress has disclosed a trade in PUBM.
- PUBM last closed at $17.01 on Oct 29, 2026.
PUBM insider trading
Between Aug 1, 2026 and Oct 29, 2026, 6 PUBM insiders filed 22 sales worth $10.9M on SEC Form 4, and no open-market purchases; 16 of the sales were pre-planned under Rule 10b5-1.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Oct 23, 2026 | Goel Rajeev K. | CHIEF EXECUTIVE OFFICER, Director, 10% Owner | Sale10b5-1 | 50,021 | $17.26 | $863K | SEC |
| Oct 19, 2026 | Kumar Mukul | PRESIDENT, ENGINEERING | Sale10b5-1 | 8,000 | $17.12 | $137K | SEC |
| Oct 6, 2026 | Pantelick Steven | CHIEF FINANCIAL OFFICER | Sale10b5-1 | 22,173 | $18.66 | $414K | SEC |
| Oct 6, 2026 | Goel Amar K. | CHAIRMAN, CHIEF INNOVATION OFF, Director, 10% Owner | Sale10b5-1 | 10,795 | $18.66 | $201K | SEC |
| Oct 6, 2026 | Woods Andrew | GENERAL COUNSEL & SECRETARY | Sale10b5-1 | 10,079 | $18.65 | $188K | SEC |
| Oct 5, 2026 | Goel Rajeev K. | CHIEF EXECUTIVE OFFICER, Director, 10% Owner | Sale | 50,233 | $18.97 | $953K | SEC |
| Oct 5, 2026 | Pantelick Steven | CHIEF FINANCIAL OFFICER | Sale | 23,491 | $18.97 | $446K | SEC |
| Oct 5, 2026 | Kumar Mukul | PRESIDENT, ENGINEERING | Sale | 7,878 | $18.97 | $149K | SEC |
| Oct 5, 2026 | Goel Amar K. | CHAIRMAN, CHIEF INNOVATION OFF, Director, 10% Owner | Sale | 7,302 | $18.97 | $139K | SEC |
| Oct 5, 2026 | Woods Andrew | GENERAL COUNSEL & SECRETARY | Sale | 5,744 | $18.97 | $109K | SEC |
| Oct 2, 2026 | Gimbel Lisa | CHIEF ACCOUNTING OFFICER | Sale10b5-1 | 500 | $18.99 | $9K | SEC |
| Sep 25, 2026 | Goel Rajeev K. | CHIEF EXECUTIVE OFFICER, Director, 10% Owner | Sale10b5-1 | 50,453 | $18.45 | $931K | SEC |
| Sep 18, 2026 | Kumar Mukul | PRESIDENT, ENGINEERING | Sale10b5-1 | 8,000 | $16.78 | $134K | SEC |
| Sep 4, 2026 | Goel Amar K. | CHAIRMAN, CHIEF INNOVATION OFF, Director, 10% Owner | Sale10b5-1 | 6,250 | $17.04 | $107K | SEC |
| Sep 2, 2026 | Gimbel Lisa | CHIEF ACCOUNTING OFFICER | Sale10b5-1 | 500 | $16.43 | $8K | SEC |
| Aug 21, 2026 | Goel Rajeev K. | CHIEF EXECUTIVE OFFICER, Director, 10% Owner | Sale10b5-1 | 49,980 | $16.49 | $824K | SEC |
| Aug 18, 2026 | Kumar Mukul | PRESIDENT, ENGINEERING | Sale10b5-1 | 8,000 | $17.05 | $136K | SEC |
| Aug 18, 2026 | Gimbel Lisa | CHIEF ACCOUNTING OFFICER | Sale | 1,396 | $17.04 | $24K | SEC |
| Aug 14, 2026 | Pantelick Steven | CHIEF FINANCIAL OFFICER | Sale10b5-1 | 41,919 | $17.28 | $724K | SEC |
| Aug 14, 2026 | Gimbel Lisa | CHIEF ACCOUNTING OFFICER | Sale10b5-1 | 500 | $17.50 | $9K | SEC |
| Aug 10, 2026 | Woods Andrew | GENERAL COUNSEL & SECRETARY | Sale10b5-1 | 38,331 | $17.96 | $688K | SEC |
| Aug 7, 2026 | Goel Rajeev K. | CHIEF EXECUTIVE OFFICER, Director, 10% Owner | Sale10b5-1 | 211,302 | $17.74 | $3.7M | SEC |
Who owns PUBM? Hedge funds and superinvestors
6 13F filers hold PUBM among their 50 largest positions, worth $38.2M combined. The biggest bets by portfolio weight are Simcoe Capital LLC (5.5%), Whitefort Capital Management, LP (3.7%) and S Squared Technology, LLC (3.0%). In their latest 13Fs, 0 managers opened a new position and 3 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Whitefort Capital Management, LPHedge fund | 3.7% | $14.6M | 1,110,656 | +61.0% shares | Q2 2026 |
| S Squared Technology, LLCHedge fund | 3.0% | $9.8M | 748,099 | +10.6% shares | Q2 2026 |
| Simcoe Capital LLCInstitutional asset manager | 5.5% | $9.1M | 693,903 | +42.7% shares | Q2 2026 |
| Diversified Investment Strategies, LLCWealth manager | 1.7% | $2.7M | 143,000 | +2.1% shares | Q3 2026 |
| P.a.w. Capital CorpAsset manager | 1.5% | $2.0M | 150,000 | -16.7% shares | Q2 2026 |
| Graham Holdings CoWealth manager | 4.1% | $45K | 3,398,904 | +0.0% shares | Q2 2026 |
Each manager counts with its latest 13F (Q3 2026: 1, Q2 2026: 5). Screen PUBM in the grand portfolio →
PUBM stock trades by members of Congress
No member of Congress has disclosed a trade in PUBM.
PUBM questions and answers
Are insiders buying PUBM stock?
Between Aug 1, 2026 and Oct 29, 2026, 6 PUBM insiders filed 22 sales worth $10.9M on SEC Form 4, and no open-market purchases; 16 of the sales were pre-planned under Rule 10b5-1.
Which hedge funds own PUBM?
6 13F filers hold PUBM among their 50 largest positions, worth $38.2M combined. The biggest bets by portfolio weight are Simcoe Capital LLC (5.5%), Whitefort Capital Management, LP (3.7%) and S Squared Technology, LLC (3.0%). In their latest 13Fs, 0 managers opened a new position and 3 added to one.
Has Congress traded PUBM?
No member of Congress has disclosed a trade in PUBM.
Who is the largest holder of PUBM?
Among 13F filers, Whitefort Capital Management, LP reports the largest PUBM position, $14.6M (1,110,656 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Simcoe Capital LLC's: 5.5% of its portfolio.
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