Citadel Advisors
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Citadel Advisors’s PubMatic PUBM Stock Holding History

Citadel Advisors’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
Q1 		$1.22M Sell
149,043
-117,100
-44% -$900K ﹤0.01% 7219
2025
Q4 		$2.36M Sell
266,143
-46,985
-15% -$409K ﹤0.01% 5603
2025
Q3 		$2.59M Sell
313,128
-184,444
-37% -$1.88M ﹤0.01% 5564
2025
Q2 		$6.19M Buy
497,572
+370,571
+292% +$3.91M ﹤0.01% 3757
2025
Q1 		$1.16M Sell
127,001
-36,561
-22% -$482K ﹤0.01% 6629
2024
Q4 		$2.4M Buy
163,562
+47,389
+41% +$734K ﹤0.01% 5250
2024
Q3 		$1.73M Buy
116,173
+80,318
+224% +$1.4M ﹤0.01% 5814
2024
Q2 		$728K Buy
35,855
+30,850
+616% +$687K ﹤0.01% 7279
2024
Q1 		$119K Buy
5,005
+4,669
+1,390% +$83.7K ﹤0.01% 11120
2023
Q4 		$5.48K Sell
336
-35,347
-99% -$513K ﹤0.01% 13424
2023
Q3 		$432K Sell
35,683
-150,736
-81% -$2.29M ﹤0.01% 8392
2023
Q2 		$3.41M Buy
186,419
+185,954
+39,990% +$2.96M ﹤0.01% 4245
2023
Q1 		$6.43K Sell
465
-1,705
-79% -$24.6K ﹤0.01% 13810
2022
Q4 		$27.8K Sell
2,170
-91,025
-98% -$1.43M ﹤0.01% 12823
2022
Q3 		$1.55M Sell
93,195
-13,552
-13% -$245K ﹤0.01% 6090
2022
Q2 		$1.7M Sell
106,747
-134,408
-56% -$2.88M ﹤0.01% 5881
2022
Q1 		$6.3M Sell
241,155
-47,354
-16% -$1.21M ﹤0.01% 3733
2021
Q4 		$9.82M Buy
288,509
+41,027
+17% +$1.34M ﹤0.01% 3107
2021
Q3 		$6.52M Buy
247,482
+239,804
+3,123% +$7.19M ﹤0.01% 3808
2021
Q2 		$300K Buy
+7,678
New +$319K ﹤0.01% 11277
2021
Q1 		– Sell
-141,057
Closed -$3.94M – 13610
2020
Q4 		$3.94M Buy
+141,057
New +$3.86M ﹤0.01% 4087

Other funds holding PUBM

GHC
Graham Holdings Company Arlington, Virginia $967M AUM 15.12% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
CP
CenterBook Partners Greenwich, Connecticut $1.86B AUM 24.52% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Jacobs Levy Equity Management
Jacobs Levy Equity Management Florham Park, New Jersey $23.8B AUM 25.4% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Citadel Advisors's PUBM Position: Q1 2026 in Review

Citadel Advisors reduced its PubMatic (PUBM) stake by 44% in Q1 2026, selling an estimated $900K and leaving 149,043 shares worth $1.22M. The position accounts for ﹤0.01% of the portfolio, ranked #7219.

Citadel Advisors first reported a position in PUBM in Q4 2020 and has held it in 21 quarters since. The position peaked at $9.82M in Q4 2021. 153 funds tracked by Wall St. Rank hold PUBM as of Q1 2026.

  • Citadel Advisors held 149,043 shares of PubMatic worth $1.22M as of Q1 2026.
  • Citadel Advisors sold 117,100 PubMatic shares in Q1 2026, an estimated $900K.
  • PubMatic made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #7219 holding.
  • Citadel Advisors first reported a position in PubMatic in Q4 2020 and has held it in 21 quarters since.
  • Citadel Advisors's PubMatic position peaked at $9.82M in Q4 2021.
  • 153 funds tracked by Wall St. Rank held PubMatic as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.