Wellington Management Group’s PubMatic PUBM Stock Holding History

Wellington Management Group’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 Q1	–	Sell	-1,170,952	Closed	-$10.4M	–	1983
2025 Q4	$10.4M	Sell	1,170,952 -297,551	-20%	-$2.59M	﹤0.01%	1243
2025 Q3	$12.2M	Buy	1,468,503 +135,070	+10%	+$1.38M	﹤0.01%	1211
2025 Q2	$16.6M	Buy	1,333,433 +255,512	+24%	+$2.69M	﹤0.01%	1034
2025 Q1	$9.85M	Buy	1,077,921 +179,951	+20%	+$2.37M	﹤0.01%	1205
2024 Q4	$13.2M	Buy	897,970 +145,641	+19%	+$2.26M	﹤0.01%	1116
2024 Q3	$11.2M	Buy	752,329 +519,275	+223%	+$9.02M	﹤0.01%	1139
2024 Q2	$4.73M	Buy	233,054 +78	+0%	+$1.74K	﹤0.01%	1335
2024 Q1	$5.53M	Sell	232,976 -90,421	-28%	-$1.62M	﹤0.01%	1302
2023 Q4	$5.27M	Buy	323,397 +17,497	+6%	+$254K	﹤0.01%	1290
2023 Q3	$3.7M	Buy	+305,900	New	+$4.65M	﹤0.01%	1354
2022 Q1	–	Sell	-17,369	Closed	-$591K	–	2200
2021 Q4	$591K	Buy	+17,369	New	+$566K	﹤0.01%	1930

Other funds holding PUBM

GHC

Graham Holdings Company Arlington, Virginia $967M AUM 15.12% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

CenterBook Partners Greenwich, Connecticut $1.86B AUM 24.52% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return

Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Jacobs Levy Equity Management Florham Park, New Jersey $23.8B AUM 25.4% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Wellington Management Group's PUBM Position: Q1 2026 in Review

Wellington Management Group sold out of PubMatic (PUBM) in Q1 2026, closing a stake of 1,170,952 shares — an estimated $10.4M sold.

Wellington Management Group first reported a position in PUBM in Q4 2021 and held it in 11 quarters. The position peaked at $16.6M in Q2 2025. 152 funds tracked by Wall St. Rank hold PUBM as of Q1 2026.

Wellington Management Group reported no remaining PubMatic position as of Q1 2026 after selling out during the quarter.
Wellington Management Group sold 1,170,952 PubMatic shares in Q1 2026, an estimated $10.4M.
Wellington Management Group first reported a position in PubMatic in Q4 2021 and held it in 11 quarters.
Wellington Management Group's PubMatic position peaked at $16.6M in Q2 2025.
152 funds tracked by Wall St. Rank held PubMatic as of Q1 2026.

Based on Wellington Management Group's 13F filing for Q1 2026, filed 15 May 2026.