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 		$1.9M Buy
231,700
+131,700
+132% +$1.01M ﹤0.01% 6174
2025
Q4 		$887K Sell
100,000
-5,700
-5% -$49.6K ﹤0.01% 7655
2025
Q3 		$875K Buy
105,700
+8,000
+8% +$81.5K ﹤0.01% 7829
2025
Q2 		$1.22M Buy
97,700
+9,100
+10% +$95.9K ﹤0.01% 6673
2025
Q1 		$810K Sell
88,600
-104,500
-54% -$1.38M ﹤0.01% 7414
2024
Q4 		$2.84M Sell
193,100
-24,300
-11% -$377K ﹤0.01% 4932
2024
Q3 		$3.23M Buy
217,400
+69,200
+47% +$1.2M ﹤0.01% 4661
2024
Q2 		$3.01M Sell
148,200
-73,400
-33% -$1.64M ﹤0.01% 4559
2024
Q1 		$5.26M Buy
221,600
+99,200
+81% +$1.78M ﹤0.01% 3882
2023
Q4 		$2M Buy
122,400
+21,100
+21% +$306K ﹤0.01% 5350
2023
Q3 		$1.23M Sell
101,300
-50,600
-33% -$770K ﹤0.01% 6155
2023
Q2 		$2.78M Sell
151,900
-38,500
-20% -$612K ﹤0.01% 4599
2023
Q1 		$2.63M Buy
190,400
+30,000
+19% +$433K ﹤0.01% 4864
2022
Q4 		$2.05M Buy
160,400
+35,300
+28% +$553K ﹤0.01% 5431
2022
Q3 		$2.08M Sell
125,100
-117,500
-48% -$2.12M ﹤0.01% 5520
2022
Q2 		$3.85M Sell
242,600
-28,400
-10% -$608K ﹤0.01% 4289
2022
Q1 		$7.08M Sell
271,000
-225,900
-45% -$5.79M ﹤0.01% 3533
2021
Q4 		$16.9M Sell
496,900
-118,700
-19% -$3.87M ﹤0.01% 2234
2021
Q3 		$16.2M Buy
+615,600
New +$18.5M ﹤0.01% 2302

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.