Latest Period
Q1 2026
Security Snapshot
PubMatic, Inc. - Class A Common Stock, par value $0.0001 per share (PUBM) Institutional Ownership
CUSIP: 74467Q103
13F Institutional Holders and Ownership History from Q1 2019 to Q1 2026
Institutions Reporting
152
Shares (Excl. Options)
28,841,350
Price
$8.18
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- Type / Class
- Equity / Class A Common Stock, par value $0.0001 per share
- Symbol
- PUBM on Nasdaq
- Shares outstanding
- 38,189,933
- Price per share
- $9.72
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 28,841,350
- Total reported value
- $235,950,944
- % of total 13F portfolios
- 0%
- Share change
- +1,140,546
- Value change
- +$7,576,637
- Number of holders
- 152
- Price from insider filings
- $9.72
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Key facts
- PUBM - PubMatic, Inc. - Class A Common Stock, par value $0.0001 per share is tracked under CUSIP 74467Q103.
- 152 institutions reported positions in Q1 2026.
- 3 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 151 to 152 between Q4 2025 and Q1 2026.
- Reported value moved from $245,211,628 to $235,950,944.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 152 institutions filings for Q1 2026.
Security key
74467Q103
Latest holder period
Q1 2026
13F holders
152
13D/G owners
3
CIK / CUSIP context first
Open Q1 2026 holders
PUBM full holder history
PubMatic, Inc. SEC filings
PubMatic, Inc. company facts
PubMatic, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 74467Q103:
Significant Owners of PubMatic, Inc. - Class A Common Stock, par value $0.0001 per share (PUBM) based on Schedule 13D/G filings
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Graham Holdings Co | 8.9% | +27% | $27,803,035 | +$4,641,676 | 3,398,904 | +20% | Graham Holdings Company | 31 Mar 2026 |
| BlackRock, Inc. | 7.1% | $24,024,430 | 2,708,504 | BlackRock, Inc. | 31 Dec 2025 | |||
| VANGUARD GROUP INC | 6.5% | -25% | $32,483,067 | -$9,982,155 | 2,611,179 | -24% | The Vanguard Group | 30 Jun 2025 |
As of 31 Mar 2026, 152 institutional investors reported holding 28,841,350 shares of PubMatic, Inc. - Class A Common Stock, par value $0.0001 per share (PUBM). This represents 76% of the company’s total 38,189,933 outstanding shares.
Top 25 Institutional Shareholders
The largest institutional shareholders of PubMatic, Inc. - Class A Common Stock, par value $0.0001 per share (PUBM) together control 62% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Graham Holdings Co | 8.9% | 3,398,904 | +20% | 2.9% | $27,803,000 |
| BlackRock, Inc. | 8% | 3,065,036 | -1.9% | 0% | $25,071,995 |
| CenterBook Partners LP | 4.6% | 1,742,100 | +52% | 0.77% | $14,250,378 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.2% | 1,613,769 | 0% | 0% | $13,200,630 |
| ACADIAN ASSET MANAGEMENT LLC | 4.1% | 1,576,540 | +70% | 0.02% | $12,890,000 |
| RENAISSANCE TECHNOLOGIES LLC | 4% | 1,540,533 | +26% | 0.02% | $12,601,560 |
| DIMENSIONAL FUND ADVISORS LP | 3.3% | 1,245,359 | -2.1% | 0% | $10,186,735 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.5% | 950,605 | +4.9% | 0% | $7,777,727 |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 2.4% | 932,213 | +0.32% | 0.03% | $7,625,502 |
| STATE STREET CORP | 2.1% | 791,419 | -4.6% | 0% | $6,473,807 |
| ROYAL BANK OF CANADA | 1.9% | 740,254 | -14% | 0% | $6,055,000 |
| Whitefort Capital Management, LP | 1.8% | 690,000 | 1.7% | $5,644,200 | |
| S SQUARED TECHNOLOGY, LLC | 1.8% | 676,399 | +141% | 2.1% | $5,532,944 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.7% | 638,785 | 0% | 0% | $5,225,261 |
| TWO SIGMA INVESTMENTS, LP | 1.4% | 534,449 | +13% | 0% | $4,371,793 |
| Simcoe Capital LLC | 1.3% | 486,252 | +19% | 3.6% | $3,977,541 |
| D. E. Shaw & Co., Inc. | 1.2% | 445,114 | -19% | 0% | $3,641,033 |
| Trexquant Investment LP | 1.1% | 422,423 | +37% | 0.02% | $3,455,420 |
| GOLDMAN SACHS GROUP INC | 0.93% | 354,200 | +42% | 0% | $2,897,356 |
| TUDOR INVESTMENT CORP ET AL | 0.92% | 351,112 | +249% | 0.02% | $2,872,096 |
| MORGAN STANLEY | 0.89% | 341,670 | +6.6% | 0% | $2,794,861 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.77% | 294,803 | -1.8% | 0% | $2,411,489 |
| NORTHERN TRUST CORP | 0.76% | 290,561 | +7.8% | 0% | $2,376,789 |
| PANAGORA ASSET MANAGEMENT INC | 0.72% | 276,256 | +1.1% | 0.01% | $2,259,774 |
| JPMORGAN CHASE & CO | 0.63% | 240,467 | +153% | 0% | $1,952,591 |
Institutional Holders of PubMatic, Inc. - Class A Common Stock, par value $0.0001 per share (PUBM) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 28,841,350 | $235,950,944 | +$7,576,637 | $8.18 | 152 |
| 2025 Q4 | 27,645,272 | $245,211,628 | -$2,890,758 | $8.87 | 151 |
| 2025 Q3 | 27,616,926 | $228,672,580 | +$10,672,256 | $8.28 | 149 |
| 2025 Q2 | 25,873,699 | $321,885,289 | +$2,432,784 | $12.44 | 148 |
| 2025 Q1 | 26,049,629 | $238,071,066 | -$7,238,984 | $9.14 | 155 |
| 2024 Q4 | 26,285,953 | $386,256,244 | +$12,372,586 | $14.69 | 160 |
| 2024 Q3 | 25,384,652 | $377,488,422 | -$11,530,482 | $14.87 | 163 |
| 2024 Q2 | 25,536,541 | $518,597,091 | +$21,849,009 | $20.31 | 190 |
| 2024 Q1 | 24,086,651 | $571,329,849 | +$56,314,665 | $23.72 | 177 |
| 2023 Q4 | 21,913,831 | $357,396,303 | +$19,571,824 | $16.31 | 145 |
| 2023 Q3 | 20,741,996 | $250,955,659 | -$2,068,078 | $12.10 | 140 |
| 2023 Q2 | 20,691,193 | $378,234,050 | -$12,628,527 | $18.28 | 135 |
| 2023 Q1 | 21,882,233 | $302,345,038 | -$1,937,519 | $13.82 | 142 |
| 2022 Q4 | 22,159,452 | $283,877,249 | -$2,542,001 | $12.81 | 154 |
| 2022 Q3 | 21,928,376 | $362,581,390 | -$3,638,661 | $16.63 | 146 |
| 2022 Q2 | 22,167,063 | $352,287,078 | +$58,826,068 | $15.89 | 143 |
| 2022 Q1 | 17,665,130 | $461,641,992 | -$20,773,359 | $26.12 | 130 |
| 2021 Q4 | 17,814,819 | $606,722,300 | +$288,340,509 | $34.05 | 160 |
| 2021 Q3 | 9,414,715 | $247,947,229 | -$24,408,282 | $26.35 | 96 |
| 2021 Q2 | 8,953,351 | $350,345,837 | +$99,863,652 | $39.07 | 86 |
| 2021 Q1 | 5,484,949 | $270,678,019 | +$47,420,169 | $49.32 | 57 |
| 2020 Q4 | 4,933,511 | $137,704,000 | +$137,702,999 | $27.96 | 43 |
| 2020 Q3 | 30 | $1,000 | $33.33 | 1 | |
| 2020 Q2 | 30 | $1,000 | $33.33 | 1 | |
| 2020 Q1 | 30 | $1,000 | $33.33 | 1 | |
| 2019 Q4 | 30 | $1,000 | $33.33 | 1 | |
| 2019 Q3 | 30 | $1,000 | $33.33 | 1 | |
| 2019 Q2 | 30 | $1,000 | $33.33 | 1 | |
| 2019 Q1 | 30 | $1,000 | $33.33 | 1 |