Stock Ownership/PUBM

PUBMATIC INC (PUBM): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in PUBM · Communication Services. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
15
13F filers
Aggregate Value
$43.9M
Across holders
Last Price
$16.36
2026-08-24
Sector
Communication Services
GICS
Quarterly fund activity8 increased7 reduced3 exited
Full exits: TUDOR INVESTMENT CORP ET AL, Magnetar Financial LLC, Man Group plc
Institutional Holders of PUBM
↗
15 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
Hedge Fund1.42M$18.6M42.4%0.0%Reduced$-1.6MQ2 2026
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund638K$8.4M19.1%0.0%Added+$1.4MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund415K$5.4M12.4%0.0%Added+$2.0MQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund286K$3.8M8.6%0.0%Added+$3.6MQ2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
Hedge Fund196K$2.6M5.8%0.0%Reduced$-141KQ2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund86K$1.1M2.6%0.0%Reduced$-78KQ2 2026
Point72 Asset Management, L.P.
CIK 0001603466
Hedge Fund79K$1.0M2.4%0.0%Added+$749KQ2 2026
Walleye Capital LLC
CIK 0001758720
Hedge Fund63K$831K1.9%0.0%Added—Q2 2026
Squarepoint Ops LLC
CIK 0001642575
Hedge Fund62K$815K1.9%0.0%Added+$512KQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund44K$581K1.3%0.0%Reduced$-5.3MQ2 2026
RENAISSANCE TECHNOLOGIES LLCReduced
Hedge Fund
$18.6M· 42.4% of total· 0.0% port· 1.42M sh· $-1.6M QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPAdded
Hedge Fund
$8.4M· 19.1% of total· 0.0% port· 638K sh· +$1.4M QoQ· Q2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$5.4M· 12.4% of total· 0.0% port· 415K sh· +$2.0M QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$3.8M· 8.6% of total· 0.0% port· 286K sh· +$3.6M QoQ· Q2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPReduced
Hedge Fund
$2.6M· 5.8% of total· 0.0% port· 196K sh· $-141K QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCReduced
Hedge Fund
$1.1M· 2.6% of total· 0.0% port· 86K sh· $-78K QoQ· Q2 2026
Point72 Asset Management, L.P.Added
Hedge Fund
$1.0M· 2.4% of total· 0.0% port· 79K sh· +$749K QoQ· Q2 2026
Walleye Capital LLCAdded
Hedge Fund
$831K· 1.9% of total· 0.0% port· 63K sh· — QoQ· Q2 2026
Squarepoint Ops LLCAdded
Hedge Fund
$815K· 1.9% of total· 0.0% port· 62K sh· +$512K QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$581K· 1.3% of total· 0.0% port· 44K sh· $-5.3M QoQ· Q2 2026
BALYASNY ASSET MANAGEMENT LLCReduced
Hedge Fund
$228K· 0.5% of total· 0.0% port· 17K sh· +$189K QoQ· Q2 2026
Grantham, Mayo, Van Otterloo & Co. LLCAdded
Institutional Manager
$210K· 0.5% of total· 0.0% port· 16K sh· — QoQ· Q2 2026
Brevan Howard Capital Management LPReduced
Hedge Fund
$149K· 0.3% of total· 0.0% port· 11K sh· $-610K QoQ· Q2 2026
CAXTON ASSOCIATES LLPAdded
Hedge Fund
$143K· 0.3% of total· 0.0% port· 11K sh· — QoQ· Q2 2026
Rockefeller Capital Management L.P.Reduced
Hedge Fund
$27K· 0.1% of total· 0.0% port· 2K sh· +$23K QoQ· Q2 2026
1–10 of 15
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