CenterBook Partners’s PubMatic PUBM Stock Holding History

CenterBook Partners’s Portfolio PUBM Stock Details PUBM Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$5.43M	Sell	413,983 -1,328,117	-76%	-$13.8M	0.27%	98
2026 Q1	$14.3M	Buy	1,742,100 +595,045	+52%	+$4.57M	0.77%	21
2025 Q4	$10.2M	Buy	1,147,055 +398,595	+53%	+$3.47M	0.5%	45
2025 Q3	$6.2M	Buy	748,460 +527,650	+239%	+$5.37M	0.31%	80
2025 Q2	$2.75M	Buy	+220,810	New	+$2.33M	0.15%	177
2025 Q1	–	Sell	-37,691	Closed	-$554K	–	577
2024 Q4	$554K	Sell	37,691 -4,260	-10%	-$66K	0.03%	402
2024 Q3	$624K	Buy	+41,951	New	+$729K	0.04%	362

Other funds holding PUBM

GHC

Graham Holdings Company Arlington, Virginia $1.08B AUM 28.93% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return

WCM

Whitefort Capital Management New York $406M AUM 84.26% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Jacobs Levy Equity Management Florham Park, New Jersey $27.8B AUM 46.46% 1-Year Est. Return

CenterBook Partners's PUBM Position: Q2 2026 in Review

CenterBook Partners reduced its PubMatic (PUBM) stake by 76% in Q2 2026, selling an estimated $13.8M and leaving 413,983 shares worth $5.43M. The position accounts for 0.27% of the portfolio, ranked #98.

CenterBook Partners first reported a position in PUBM in Q3 2024 and has held it in 7 quarters since. The position peaked at $14.3M in Q1 2026. 153 funds tracked by Wall St. Rank hold PUBM as of Q2 2026.

CenterBook Partners held 413,983 shares of PubMatic worth $5.43M as of Q2 2026.
CenterBook Partners sold 1,328,117 PubMatic shares in Q2 2026, an estimated $13.8M.
PubMatic made up 0.27% of CenterBook Partners's portfolio in Q2 2026, its #98 holding.
CenterBook Partners first reported a position in PubMatic in Q3 2024 and has held it in 7 quarters since.
CenterBook Partners's PubMatic position peaked at $14.3M in Q1 2026.
153 funds tracked by Wall St. Rank held PubMatic as of Q2 2026.

Based on CenterBook Partners's 13F filing for Q2 2026, filed 11 Aug 2026.