JO
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John Overdeck’s PubMatic PUBM Stock Holding History

John Overdeck’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 		$8.37M Buy
638,102
+103,653
+19% +$1.08M 0.01% 1658
2026
Q1 		$4.37M Buy
534,449
+60,269
+13% +$463K ﹤0.01% 2086
2025
Q4 		$4.21M Buy
474,180
+89,275
+23% +$778K 0.01% 1866
2025
Q3 		$3.19M Buy
384,905
+228,878
+147% +$2.33M ﹤0.01% 1804
2025
Q2 		$1.94M Buy
+156,027
New +$1.64M ﹤0.01% 1857
2025
Q1 		– Sell
-23,208
Closed -$341K – 3433
2024
Q4 		$341K Sell
23,208
-2,592
-10% -$40.2K ﹤0.01% 2694
2024
Q3 		$384K Sell
25,800
-11,198
-30% -$194K ﹤0.01% 2575
2024
Q2 		$751K Buy
36,998
+17,571
+90% +$392K ﹤0.01% 2149
2024
Q1 		$461K Buy
+19,427
New +$348K ﹤0.01% 2375
2023
Q4 		– Sell
-13,011
Closed -$157K – 3334
2023
Q3 		$157K Sell
13,011
-15,589
-55% -$237K ﹤0.01% 2685
2023
Q2 		$523K Buy
+28,600
New +$455K ﹤0.01% 2311
2021
Q4 		– Sell
-77,843
Closed -$2.05M – 4756
2021
Q3 		$2.05M Buy
+77,843
New +$2.34M ﹤0.01% 1968

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

John Overdeck's PUBM Position: Q2 2026 in Review

John Overdeck increased its PubMatic (PUBM) stake by 19% in Q2 2026, buying an estimated $1.08M and bringing the position to 638,102 shares worth $8.37M. The position accounts for 0.01% of the portfolio, ranked #1658.

John Overdeck first reported a position in PUBM in Q3 2021 and has held it in 12 quarters since. 152 funds tracked by Wall St. Rank hold PUBM as of Q2 2026.

  • John Overdeck held 638,102 shares of PubMatic worth $8.37M as of Q2 2026.
  • John Overdeck bought 103,653 PubMatic shares in Q2 2026, an estimated $1.08M.
  • PubMatic made up 0.01% of John Overdeck's portfolio in Q2 2026, its #1658 holding.
  • John Overdeck first reported a position in PubMatic in Q3 2021 and has held it in 12 quarters since.
  • 152 funds tracked by Wall St. Rank held PubMatic as of Q2 2026.

Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.