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
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

LMC
Lightspeed Management Company Menlo Park, California $988M AUM 7.5% 1-Year Est. Return
AIM
ARK Investment Management St. Petersburg, Florida $12.9B AUM 64.92% 1-Year Est. Return
Ameriprise
Ameriprise Minneapolis, Minnesota $432B AUM 30.22% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
Aberdeen Group
Aberdeen Group Edinburgh, United Kingdom $71.2B AUM 41.74% 1-Year Est. Return
DTC
Deep Track Capital Greenwich, Connecticut $6.12B AUM 144% 1-Year Est. Return
ACM
AIGH Capital Management Baltimore, Maryland $733M AUM 327.32% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
KCM
Kennedy Capital Management St Louis, Missouri $4.72B AUM 36.69% 1-Year Est. Return

Merck & Co's PSNL Position: Q1 2026 in Review

Merck & Co held its Personalis (PSNL) position steady in Q1 2026 at 14,044,943 shares worth $89.5M. The position accounts for 25.6% of the portfolio, ranked #2.

Merck & Co first reported a position in PSNL in Q4 2024 and has held it in 6 quarters since. The position peaked at $112M in Q4 2025. 140 funds tracked by Wall St. Rank hold PSNL as of Q1 2026.

  • Merck & Co held 14,044,943 shares of Personalis worth $89.5M as of Q1 2026.
  • Merck & Co left its Personalis share count unchanged in Q1 2026.
  • Personalis made up 25.6% of Merck & Co's portfolio in Q1 2026, its #2 holding.
  • Merck & Co first reported a position in Personalis in Q4 2024 and has held it in 6 quarters since.
  • Merck & Co's Personalis position peaked at $112M in Q4 2025.
  • 140 funds tracked by Wall St. Rank held Personalis as of Q1 2026.

Based on Merck & Co's 13F filing for Q1 2026, filed 13 May 2026.