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Who owns Personalis (PSNL) stock

157 funds reported Personalis (PSNL) shares in their latest 13F filings, worth $1.1B in all. The largest holder is Merck ($188M). Last quarter 98 funds added to their stakes and 51 cut them.

Largest holders of PSNL (13F)Largest holders of PSNL (13F)Merck$188MARK Investment Management LLC$111MBlackRock$94.9MLightspeed Management Company, L.…$81.8MAmeriprise Financial$81.6MDeep Track Capital, LP$53.6Mabrdn$50.2MVanguard Capital Management LLC$40.3MCasdin Capital, LLC$34.2MKennedy Capital Management LLC$31.7M

Largest holders (13F)

FundSharesValueChangeQuarter
Merck14,044,943$188Munchanged2026-06-30
ARK Investment Management LLC8,271,339$111Mincrease2026-06-30
BlackRock7,082,491$94.9Mincrease2026-06-30
Lightspeed Management Company, L.L.C.6,101,850$81.8Mdecrease2026-06-30
Ameriprise Financial6,086,315$81.6Mdecrease2026-06-30
Deep Track Capital, LP4,000,000$53.6Mincrease2026-06-30
abrdn3,747,290$50.2Mincrease2026-06-30
Vanguard Capital Management LLC3,010,150$40.3Mincrease2026-06-30
Casdin Capital, LLC2,550,000$34.2Mincrease2026-06-30
Kennedy Capital Management LLC2,364,282$31.7Mincrease2026-06-30
Vanguard Group3,253,797$25.9Mincrease2025-12-31
Geode Capital Management, LLC1,822,445$24.4Mincrease2026-06-30
Bank of America1,820,541$24.4Mincrease2026-06-30
Blue Water Life Science Advisors, LP1,676,300$22.5Munchanged2026-06-30
Dimensional Fund Advisors LP1,496,983$20.1Mincrease2026-06-30

Personalis' latest quarter

Personalis, Q3 2026: revenue $25.6M (+77% year over year), operating margin -138.8%, net loss $33.8M, operating cash flow −$27.1M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most PSNL stock?

By the latest 13F filings: Merck ($188M); ARK Investment Management LLC ($111M); BlackRock ($94.9M); Lightspeed Management Company, L.L.C. ($81.8M); Ameriprise Financial ($81.6M).

What is the short interest in PSNL?

6,793,284 shares were sold short at the 2026-10-15 settlement, -19.39% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.