Jane Street’s PubMatic PUBM Stock Holding History

Jane Street’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	$133K	Sell	10,100 -26,500	-72%	-$275K	﹤0.01%	10440
2026 Q1	$299K	Sell	36,600 -13,900	-28%	-$107K	﹤0.01%	9247
2025 Q4	$448K	Buy	50,500 +2,600	+5%	+$22.6K	﹤0.01%	7943
2025 Q3	$397K	Buy	47,900 +22,300	+87%	+$227K	﹤0.01%	8336
2025 Q2	$318K	Buy	+25,600	New	+$270K	﹤0.01%	7749
2025 Q1	–	Sell	-17,300	Closed	-$254K	–	10380
2024 Q4	$254K	Buy	+17,300	New	+$268K	﹤0.01%	8009
2023 Q3	–	Sell	-13,800	Closed	-$252K	–	9222
2023 Q2	$252K	Buy	+13,800	New	+$219K	﹤0.01%	7378
2023 Q1	–	Sell	-16,900	Closed	-$216K	–	9741
2022 Q4	$216K	Sell	16,900 -47,900	-74%	-$751K	﹤0.01%	7548
2022 Q3	$1.08M	Sell	64,800 -105,400	-62%	-$1.91M	﹤0.01%	5287
2022 Q2	$2.7M	Sell	170,200 -7,700	-4%	-$165K	﹤0.01%	3624
2022 Q1	$4.65M	Buy	177,900 +17,000	+11%	+$436K	﹤0.01%	3145
2021 Q4	$5.48M	Buy	160,900 +86,900	+117%	+$2.83M	﹤0.01%	2712
2021 Q3	$1.95M	Buy	74,000 +64,900	+713%	+$1.95M	﹤0.01%	4528
2021 Q2	$356K	Buy	+9,100	New	+$379K	﹤0.01%	7868

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

Jane Street's PUBM Position: Q2 2026 in Review

Jane Street reduced its PubMatic (PUBM) stake by 5.2% in Q2 2026, selling an estimated $113K and leaving 199,131 shares worth $2.61M. The position accounts for ﹤0.01% of the portfolio, ranked #4713.

Jane Street first reported a position in PUBM in Q4 2020 and has held it in 22 quarters since. The position peaked at $2.82M in Q3 2023. 153 funds tracked by Wall St. Rank hold PUBM as of Q2 2026.

Jane Street held 199,131 shares of PubMatic worth $2.61M as of Q2 2026.
Jane Street sold 10,869 PubMatic shares in Q2 2026, an estimated $113K.
PubMatic made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #4713 holding.
Jane Street first reported a position in PubMatic in Q4 2020 and has held it in 22 quarters since.
Jane Street's PubMatic position peaked at $2.82M in Q3 2023.
153 funds tracked by Wall St. Rank held PubMatic as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.