XT
PUBM icon

XTX Topco’s PubMatic PUBM Stock Holding History

XTX Topco’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 		$440K Sell
33,501
-34,957
-51% -$363K 0.01% 2571
2026
Q1 		$560K Buy
68,458
+45,990
+205% +$354K 0.01% 1933
2025
Q4 		$199K Buy
+22,468
New +$196K 0.01% 2405
2025
Q1 		– Sell
-15,510
Closed -$228K – 2963
2024
Q4 		$228K Buy
+15,510
New +$240K 0.02% 1450
2024
Q1 		– Sell
-20,618
Closed -$336K – 2223
2023
Q4 		$336K Buy
+20,618
New +$299K 0.07% 535

Other funds holding PUBM

GHC
Graham Holdings Company Arlington, Virginia $1.08B AUM 28.93% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Renaissance Technologies
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
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Jacobs Levy Equity Management
Jacobs Levy Equity Management Florham Park, New Jersey $27.8B AUM 46.46% 1-Year Est. Return

XTX Topco's PUBM Position: Q2 2026 in Review

XTX Topco reduced its PubMatic (PUBM) stake by 51% in Q2 2026, selling an estimated $363K and leaving 33,501 shares worth $440K. The position accounts for 0.01% of the portfolio, ranked #2571.

XTX Topco first reported a position in PUBM in Q4 2023 and has held it in 5 quarters since. The position peaked at $560K in Q1 2026. 153 funds tracked by Wall St. Rank hold PUBM as of Q2 2026.

  • XTX Topco held 33,501 shares of PubMatic worth $440K as of Q2 2026.
  • XTX Topco sold 34,957 PubMatic shares in Q2 2026, an estimated $363K.
  • PubMatic made up 0.01% of XTX Topco's portfolio in Q2 2026, its #2571 holding.
  • XTX Topco first reported a position in PubMatic in Q4 2023 and has held it in 5 quarters since.
  • XTX Topco's PubMatic position peaked at $560K in Q1 2026.
  • 153 funds tracked by Wall St. Rank held PubMatic as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.