Marshall Wace
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Marshall Wace’s Personalis PSNL Stock Holding History

Marshall Wace’s Portfolio PSNL Stock Details PSNL Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$358K Buy
+26,730
New +$218K ﹤0.01% 2645
2025
Q2 		– Sell
-696,286
Closed -$2.44M – 3067
2025
Q1 		$2.44M Buy
696,286
+626,276
+895% +$2.98M ﹤0.01% 1388
2024
Q4 		$405K Sell
70,010
-386,966
-85% -$1.79M ﹤0.01% 2118
2024
Q3 		$2.46M Buy
456,976
+347,124
+316% +$1.43M ﹤0.01% 1290
2024
Q2 		$129K Sell
109,852
-101,050
-48% -$139K ﹤0.01% 2375
2024
Q1 		$314K Buy
210,902
+59,221
+39% +$91.7K ﹤0.01% 2095
2023
Q4 		$319K Buy
+151,681
New +$196K ﹤0.01% 1871
2023
Q1 		– Sell
-221,823
Closed -$439K – 3018
2022
Q4 		$439K Sell
221,823
-215,698
-49% -$543K ﹤0.01% 2422
2022
Q3 		$1.3M Sell
437,521
-156,121
-26% -$595K ﹤0.01% 2278
2022
Q2 		$2.05M Buy
593,642
+202,371
+52% +$1.03M ﹤0.01% 1971
2022
Q1 		$3.2M Sell
391,271
-370,054
-49% -$3.83M 0.01% 1740
2021
Q4 		$10.9M Sell
761,325
-530,923
-41% -$8.85M 0.02% 812
2021
Q3 		$24.9M Sell
1,292,248
-1,979
-0.2% -$41.4K 0.1% 211
2021
Q2 		$32.7M Buy
1,294,227
+743,691
+135% +$17M 0.15% 141
2021
Q1 		$13.5M Buy
550,536
+250,604
+84% +$8.59M 0.06% 322
2020
Q4 		$11M Buy
+299,932
New +$9.07M 0.06% 321

Other funds holding PSNL

MC
Merck & Co Rahway, New Jersey $526M AUM 175.27% 1-Year Est. Return
AIM
ARK Investment Management St. Petersburg, Florida $15.4B AUM 50.29% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
LMC
Lightspeed Management Company Menlo Park, California $2.4B AUM 7.07% 1-Year Est. Return
Ameriprise
Ameriprise Minneapolis, Minnesota $495B AUM 43.24% 1-Year Est. Return
DTC
Deep Track Capital Greenwich, Connecticut $6.87B AUM 205.24% 1-Year Est. Return
Aberdeen Group
Aberdeen Group Edinburgh, United Kingdom $71.2B AUM 41.74% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
CC
Casdin Capital New York $2B AUM 147.21% 1-Year Est. Return
KCM
Kennedy Capital Management St Louis, Missouri $5.65B AUM 61.31% 1-Year Est. Return

Marshall Wace's PSNL Position: Q2 2026 in Review

Marshall Wace opened a new position in Personalis (PSNL) in Q2 2026: 26,730 shares worth $358K. The stake represents ﹤0.01% of the portfolio and ranks #2645 among its holdings. This is a return to the name: Marshall Wace previously reported a position in PSNL as recently as Q1 2025.

Marshall Wace first reported a position in PSNL in Q4 2020 and has held it in 16 quarters since. The position peaked at $32.7M in Q2 2021. 159 funds tracked by Wall St. Rank hold PSNL as of Q2 2026.

  • Marshall Wace held 26,730 shares of Personalis worth $358K as of Q2 2026.
  • Personalis was a new Marshall Wace position in Q2 2026.
  • Personalis made up ﹤0.01% of Marshall Wace's portfolio in Q2 2026, its #2645 holding.
  • Marshall Wace first reported a position in Personalis in Q4 2020 and has held it in 16 quarters since.
  • Marshall Wace's Personalis position peaked at $32.7M in Q2 2021.
  • 159 funds tracked by Wall St. Rank held Personalis as of Q2 2026.

Based on Marshall Wace's 13F filing for Q2 2026, filed 13 Aug 2026.