Simplex Trading’s PubMatic PUBM Stock Holding History

Simplex Trading’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	$775K	Buy	59,051 +38,062	+181%	+$395K	﹤0.01%	3067
2026 Q1	$172K	Buy	20,989 +9,662	+85%	+$74.3K	﹤0.01%	4475
2025 Q4	$100K	Buy	+11,327	New	+$98.7K	﹤0.01%	4997
2025 Q3	–	Sell	-29,432	Closed	-$300K	–	9852
2025 Q2	$366K	Buy	29,432 +2,176	+8%	+$22.9K	﹤0.01%	3849
2025 Q1	$249K	Buy	+27,256	New	+$359K	﹤0.01%	4094
2023 Q4	–	Sell	-27,441	Closed	-$398K	–	9611
2023 Q3	$332K	Sell	27,441 -25,799	-48%	-$393K	﹤0.01%	3835
2023 Q2	$973K	Buy	53,240 +25,858	+94%	+$411K	﹤0.01%	2628
2023 Q1	$378K	Sell	27,382 -5,461	-17%	-$78.9K	﹤0.01%	3567
2022 Q4	$420K	Sell	32,843 -25,812	-44%	-$405K	﹤0.01%	3352
2022 Q3	$975K	Buy	+58,655	New	+$1.06M	﹤0.01%	2671
2022 Q2	–	Sell	-6,136	Closed	-$131K	–	10871
2022 Q1	$160K	Sell	6,136 -13,530	-69%	-$347K	﹤0.01%	5476
2021 Q4	$669K	Buy	19,666 +14,842	+308%	+$484K	﹤0.01%	3422
2021 Q3	$177K	Buy	4,824 +3	+0.1%	+$90	﹤0.01%	5800
2021 Q2	$188K	Buy	+4,821	New	+$201K	﹤0.01%	5778

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

Simplex Trading's PUBM Position: Q2 2026 in Review

Simplex Trading increased its PubMatic (PUBM) stake by 181% in Q2 2026, buying an estimated $395K and bringing the position to 59,051 shares worth $775K. The position accounts for ﹤0.01% of the portfolio, ranked #3067.

Simplex Trading first reported a position in PUBM in Q2 2021 and has held it in 14 quarters since. The position peaked at $975K in Q3 2022. 153 funds tracked by Wall St. Rank hold PUBM as of Q2 2026.

Simplex Trading held 59,051 shares of PubMatic worth $775K as of Q2 2026.
Simplex Trading bought 38,062 PubMatic shares in Q2 2026, an estimated $395K.
PubMatic made up ﹤0.01% of Simplex Trading's portfolio in Q2 2026, its #3067 holding.
Simplex Trading first reported a position in PubMatic in Q2 2021 and has held it in 14 quarters since.
Simplex Trading's PubMatic position peaked at $975K in Q3 2022.
153 funds tracked by Wall St. Rank held PubMatic as of Q2 2026.

Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.