Simplex Trading
PUBM icon

Simplex Trading’s PubMatic PUBM Stock Holding History

Simplex Trading’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
Q3 		$382K Sell
20,420
-38,631
-65% -$601K ﹤0.01% 3877
2026
Q2 		$775K Buy
59,051
+38,062
+181% +$395K ﹤0.01% 3067
2026
Q1 		$172K Buy
20,989
+9,662
+85% +$74.3K ﹤0.01% 4475
2025
Q4 		$100K Buy
+11,327
New +$98.7K ﹤0.01% 4997
2025
Q3 		– Sell
-29,432
Closed -$300K – 9852
2025
Q2 		$366K Buy
29,432
+2,176
+8% +$22.9K ﹤0.01% 3849
2025
Q1 		$249K Buy
+27,256
New +$359K ﹤0.01% 4094
2023
Q4 		– Sell
-27,441
Closed -$398K – 9611
2023
Q3 		$332K Sell
27,441
-25,799
-48% -$393K ﹤0.01% 3835
2023
Q2 		$973K Buy
53,240
+25,858
+94% +$411K ﹤0.01% 2628
2023
Q1 		$378K Sell
27,382
-5,461
-17% -$78.9K ﹤0.01% 3567
2022
Q4 		$420K Sell
32,843
-25,812
-44% -$405K ﹤0.01% 3352
2022
Q3 		$975K Buy
+58,655
New +$1.06M ﹤0.01% 2671
2022
Q2 		– Sell
-6,136
Closed -$131K – 10871
2022
Q1 		$160K Sell
6,136
-13,530
-69% -$347K ﹤0.01% 5476
2021
Q4 		$669K Buy
19,666
+14,842
+308% +$484K ﹤0.01% 3422
2021
Q3 		$177K Buy
4,824
+3
+0.1% +$90 ﹤0.01% 5800
2021
Q2 		$188K Buy
+4,821
New +$201K ﹤0.01% 5778

Other funds holding PUBM

Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $85.7B AUM 51.02% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $73.4B AUM 32.8% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $551B AUM 33.95% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $229B AUM 33.35% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $111B AUM 30.48% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.44T AUM 36.12% 1-Year Est. Return
Nuveen
Nuveen Charlotte, North Carolina $420B AUM 34.97% 1-Year Est. Return
SC
Simcoe Capital Spokane, Washington $146M AUM 53.45% 1-Year Est. Return
Qube Research & Technologies (QRT)
Qube Research & Technologies (QRT) London, United Kingdom $123B AUM 30.05% 1-Year Est. Return

Simplex Trading's PUBM Position: Q3 2026 in Review

Simplex Trading reduced its PubMatic (PUBM) stake by 65% in Q3 2026, selling an estimated $601K and leaving 20,420 shares worth $382K. The position accounts for ﹤0.01% of the portfolio, ranked #3877.

Simplex Trading first reported a position in PUBM in Q2 2021 and has held it in 15 quarters since. The position peaked at $975K in Q3 2022. 101 funds tracked by Wall St. Rank hold PUBM as of Q3 2026.

  • Simplex Trading held 20,420 shares of PubMatic worth $382K as of Q3 2026.
  • Simplex Trading sold 38,631 PubMatic shares in Q3 2026, an estimated $601K.
  • PubMatic made up ﹤0.01% of Simplex Trading's portfolio in Q3 2026, its #3877 holding.
  • Simplex Trading first reported a position in PubMatic in Q2 2021 and has held it in 15 quarters since.
  • Simplex Trading's PubMatic position peaked at $975K in Q3 2022.
  • 101 funds tracked by Wall St. Rank held PubMatic as of Q3 2026.

Based on Simplex Trading's 13F filing for Q3 2026, filed 4 Nov 2026.