Walleye Trading’s PubMatic PUBM Stock Holding History

Walleye 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	$152K	Sell	11,560 -1,523	-12%	-$15.8K	﹤0.01%	3250
2026 Q1	$107K	Sell	13,083 -17,497	-57%	-$135K	﹤0.01%	3434
2025 Q4	$271K	Sell	30,580 -39,987	-57%	-$348K	﹤0.01%	3228
2025 Q3	$584K	Buy	70,567 +27,235	+63%	+$277K	﹤0.01%	2637
2025 Q2	$539K	Buy	+43,332	New	+$457K	﹤0.01%	2597
2025 Q1	–	Sell	-12,709	Closed	-$187K	–	4590
2024 Q4	$187K	Buy	12,709 +11,973	+1,627%	+$186K	﹤0.01%	3268
2024 Q3	$10.9K	Buy	+736	New	+$12.8K	﹤0.01%	3747
2024 Q2	–	Sell	-55,961	Closed	-$1.25M	–	4806
2024 Q1	$1.33M	Buy	55,961 +12,770	+30%	+$229K	﹤0.01%	2016
2023 Q4	$704K	Buy	43,191 +37,926	+720%	+$550K	﹤0.01%	2772
2023 Q3	$63.7K	Buy	+5,265	New	+$80.1K	﹤0.01%	4148
2023 Q1	–	Sell	-154	Closed	-$2.22K	–	5280
2022 Q4	$1.97K	Sell	154 -9,139	-98%	-$143K	﹤0.01%	4725
2022 Q3	$155K	Buy	+9,293	New	+$168K	﹤0.01%	3858
2022 Q1	–	Sell	-2,080	Closed	-$53.3K	–	5813
2021 Q4	$71K	Buy	2,080 +928	+81%	+$30.2K	﹤0.01%	4535
2021 Q3	$30K	Buy	+1,152	New	+$34.6K	﹤0.01%	4776

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

Walleye Trading's PUBM Position: Q2 2026 in Review

Walleye Trading reduced its PubMatic (PUBM) stake by 12% in Q2 2026, selling an estimated $15.8K and leaving 11,560 shares worth $152K. The position accounts for ﹤0.01% of the portfolio, ranked #3250.

Walleye Trading first reported a position in PUBM in Q3 2021 and has held it in 14 quarters since. The position peaked at $1.33M in Q1 2024. 153 funds tracked by Wall St. Rank hold PUBM as of Q2 2026.

Walleye Trading held 11,560 shares of PubMatic worth $152K as of Q2 2026.
Walleye Trading sold 1,523 PubMatic shares in Q2 2026, an estimated $15.8K.
PubMatic made up ﹤0.01% of Walleye Trading's portfolio in Q2 2026, its #3250 holding.
Walleye Trading first reported a position in PubMatic in Q3 2021 and has held it in 14 quarters since.
Walleye Trading's PubMatic position peaked at $1.33M in Q1 2024.
153 funds tracked by Wall St. Rank held PubMatic as of Q2 2026.

Based on Walleye Trading's 13F filing for Q2 2026, filed 3 Aug 2026.