MC
PSNL icon

Merck & Co’s Personalis PSNL Stock Holding History

Merck & Co’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 		$188M Hold
14,044,943
– – 35.75% 1
2026
Q1 		$89.5M Hold
14,044,943
– – 25.6% 2
2025
Q4 		$112M Hold
14,044,943
– – 40.47% 1
2025
Q3 		$91.6M Hold
14,044,943
– – 40.16% 1
2025
Q2 		$92.1M Hold
14,044,943
– – 42.73% 1
2025
Q1 		$49.3M Hold
14,044,943
– – 30.01% 2
2024
Q4 		$81.2M Buy
+14,044,943
New +$64.8M 31.46% 2

Other funds holding PSNL

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
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Merck & Co's PSNL Position: Q2 2026 in Review

Merck & Co held its Personalis (PSNL) position steady in Q2 2026 at 14,044,943 shares worth $188M. The position accounts for 35.75% of the portfolio, ranked #1.

Merck & Co first reported a position in PSNL in Q4 2024 and has held it in 7 quarters since. 158 funds tracked by Wall St. Rank hold PSNL as of Q2 2026.

  • Merck & Co held 14,044,943 shares of Personalis worth $188M as of Q2 2026.
  • Merck & Co left its Personalis share count unchanged in Q2 2026.
  • Personalis made up 35.75% of Merck & Co's portfolio in Q2 2026, its #1 holding.
  • Merck & Co first reported a position in Personalis in Q4 2024 and has held it in 7 quarters since.
  • 158 funds tracked by Wall St. Rank held Personalis as of Q2 2026.

Based on Merck & Co's 13F filing for Q2 2026, filed 7 Aug 2026.