Magnetar Financial’s PubMatic PUBM Stock Holding History

Magnetar Financial’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	–	Sell	-50,026	Closed	-$409K	–	1408
2026 Q1	$409K	Buy	50,026 +14,928	+43%	+$115K	﹤0.01%	680
2025 Q4	$311K	Buy	+35,098	New	+$306K	﹤0.01%	674
2025 Q2	–	Sell	-16,178	Closed	-$148K	–	1098
2025 Q1	$148K	Sell	16,178 -12,558	-44%	-$166K	﹤0.01%	692
2024 Q4	$422K	Buy	+28,736	New	+$445K	0.01%	401
2024 Q3	–	Sell	-17,392	Closed	-$353K	–	659
2024 Q2	$353K	Buy	+17,392	New	+$388K	0.01%	364

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

Magnetar Financial's PUBM Position: Q2 2026 in Review

Magnetar Financial sold out of PubMatic (PUBM) in Q2 2026, closing a stake of 50,026 shares — an estimated $409K sold.

Magnetar Financial first reported a position in PUBM in Q2 2024 and held it in 5 quarters. The position peaked at $422K in Q4 2024. 153 funds tracked by Wall St. Rank hold PUBM as of Q2 2026.

Magnetar Financial reported no remaining PubMatic position as of Q2 2026 after selling out during the quarter.
Magnetar Financial sold 50,026 PubMatic shares in Q2 2026, an estimated $409K.
Magnetar Financial first reported a position in PubMatic in Q2 2024 and held it in 5 quarters.
Magnetar Financial's PubMatic position peaked at $422K in Q4 2024.
153 funds tracked by Wall St. Rank held PubMatic as of Q2 2026.

Based on Magnetar Financial's 13F filing for Q2 2026, filed 14 Aug 2026.