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
Q1 		$617K Sell
75,400
-32,300
-30% -$248K ﹤0.01% 3032
2025
Q4 		$955K Buy
107,700
+41,600
+63% +$362K ﹤0.01% 2659
2025
Q3 		$547K Buy
66,100
+47,200
+250% +$481K ﹤0.01% 3708
2025
Q2 		$235K Sell
18,900
-16,900
-47% -$178K ﹤0.01% 4343
2025
Q1 		$327K Sell
35,800
-13,800
-28% -$182K ﹤0.01% 3851
2024
Q4 		$728K Buy
49,600
+1,200
+2% +$18.6K ﹤0.01% 3169
2024
Q3 		$719K Sell
48,400
-15,100
-24% -$262K ﹤0.01% 3230
2024
Q2 		$1.29M Buy
63,500
+400
+0.6% +$8.91K ﹤0.01% 2658
2024
Q1 		$1.5M Buy
63,100
+9,400
+18% +$169K ﹤0.01% 2692
2023
Q4 		$875K Buy
53,700
+29,200
+119% +$424K ﹤0.01% 3131
2023
Q3 		$296K Buy
24,500
+16,800
+218% +$256K ﹤0.01% 3952
2023
Q2 		$140K Buy
7,700
+2,700
+54% +$42.9K ﹤0.01% 4695
2023
Q1 		$69K Sell
5,000
-17,500
-78% -$253K ﹤0.01% 5567
2022
Q4 		$288K Sell
22,500
-25,800
-53% -$404K ﹤0.01% 3788
2022
Q3 		$803K Buy
48,300
+8,900
+23% +$161K ﹤0.01% 2910
2022
Q2 		$626K Sell
39,400
-12,100
-23% -$259K ﹤0.01% 3177
2022
Q1 		$1.34M Sell
51,500
-29,700
-37% -$761K ﹤0.01% 2537
2021
Q4 		$2.76M Buy
81,200
+80,900
+26,967% +$2.64M ﹤0.01% 1716
2021
Q3 		$11K Hold
300
– – ﹤0.01% 8880
2021
Q2 		$11K Buy
+300
New +$12.5K ﹤0.01% 9047

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

Simplex Trading's PUBM Position: Q1 2026 in Review

Simplex Trading increased its PubMatic (PUBM) stake by 85% in Q1 2026, buying an estimated $74.3K and bringing the position to 20,989 shares worth $172K. The position accounts for ﹤0.01% of the portfolio, ranked #4475.

Simplex Trading first reported a position in PUBM in Q2 2021 and has held it in 13 quarters since. The position peaked at $975K in Q3 2022. 152 funds tracked by Wall St. Rank hold PUBM as of Q1 2026.

  • Simplex Trading held 20,989 shares of PubMatic worth $172K as of Q1 2026.
  • Simplex Trading bought 9,662 PubMatic shares in Q1 2026, an estimated $74.3K.
  • PubMatic made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #4475 holding.
  • Simplex Trading first reported a position in PubMatic in Q2 2021 and has held it in 13 quarters since.
  • Simplex Trading's PubMatic position peaked at $975K in Q3 2022.
  • 152 funds tracked by Wall St. Rank held PubMatic as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.