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 		$826K Sell
101,000
-128,000
-56% -$984K ﹤0.01% 8101
2025
Q4 		$2.03M Buy
229,000
+122,800
+116% +$1.07M ﹤0.01% 5873
2025
Q3 		$879K Sell
106,200
-26,500
-20% -$270K ﹤0.01% 7814
2025
Q2 		$1.65M Buy
132,700
+14,900
+13% +$157K ﹤0.01% 6076
2025
Q1 		$1.08M Sell
117,800
-20,200
-15% -$266K ﹤0.01% 6799
2024
Q4 		$2.03M Sell
138,000
-93,700
-40% -$1.45M ﹤0.01% 5588
2024
Q3 		$3.45M Buy
231,700
+20,700
+10% +$360K ﹤0.01% 4548
2024
Q2 		$4.29M Buy
211,000
+42,900
+26% +$956K ﹤0.01% 3991
2024
Q1 		$3.99M Sell
168,100
-105,300
-39% -$1.89M ﹤0.01% 4306
2023
Q4 		$4.46M Buy
273,400
+86,300
+46% +$1.25M ﹤0.01% 3968
2023
Q3 		$2.26M Buy
187,100
+11,700
+7% +$178K ﹤0.01% 5000
2023
Q2 		$3.21M Sell
175,400
-45,200
-20% -$719K ﹤0.01% 4348
2023
Q1 		$3.05M Buy
220,600
+79,700
+57% +$1.15M ﹤0.01% 4606
2022
Q4 		$1.8M Sell
140,900
-18,000
-11% -$282K ﹤0.01% 5664
2022
Q3 		$2.64M Buy
158,900
+45,000
+40% +$813K ﹤0.01% 5067
2022
Q2 		$1.81M Sell
113,900
-45,800
-29% -$981K ﹤0.01% 5741
2022
Q1 		$4.17M Sell
159,700
-28,000
-15% -$717K ﹤0.01% 4529
2021
Q4 		$6.39M Buy
187,700
+72,800
+63% +$2.37M ﹤0.01% 3864
2021
Q3 		$3.03M Buy
+114,900
New +$3.45M ﹤0.01% 5341

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. 152 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.
  • 152 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.