Personalis, Inc. (PSNL)

Distributing

Strong institutional distribution: ownership decreased -10.43% quarter-over-quarter.

Data as of Q1 2026

Institutional Ownership

79.29%

QoQ Change

-10.43%

Total Value

$497.3B

Shares Outstanding

104.7M

Crowding AnalysisCrowded

Holders138of 5,944

Avg: 68

Uncrowded89th percentileCrowded

Institutional Activity

Buy/Sell Ratio1.45x

75th percentile

84 buying58 selling

+37

New

-20

Closed

+3.6M

Net shares

Holding Period Distribution

estimate

Median: 3 QAvg: 2.7 QHolders: 138

Ownership Concentration

Top 5: 52.0%Top 10: 72.4%

Merck & Co.,16.9%

Lightspeed Management Company, L.L.C.9.8%

ARK Investment Management9.6%

AMERIPRISE FINANCIAL9.1%

BlackRock,6.5%

Others (133)48.0%

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Conviction-Weighted Ownership

Median weight: 0.17%Avg weight: 3.42%Max: 25.60%High conviction (>1%): 3

Merck & Co.,

Lightspeed Management Company, L.L.C.

ARK Investment Management

AMERIPRISE FINANCIAL

BlackRock,

T. Rowe Price Investment Management,

Aberdeen Group

Deep Track Capital,

AIGH Capital Management

VANGUARD CAPITAL MANAGEMENT

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Whale Moves Timeline (8 Quarters)

Biggest dollar-value position changes among top 10 holders

NEWDeep Track Capital$19M3.0M shr

NEWVANGUARD CAPITAL MANAGEMENT$18M2.9M shr

BOUGHTAMERIPRISE FINANCIAL$8M1.3M shr

BOUGHTAberdeen Group$2M238K shr

BOUGHTBlackRock$448K70K shr

NEWAMERIPRISE FINANCIAL$50M6.3M shr

SOLDAIGH Capital Management$8M992K shr

BOUGHTAberdeen Group$7M862K shr

SOLDBlackRock$3M325K shr

BOUGHTVANGUARD GROUP$2M247K shr

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Institutional Trends (8 Quarters)

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Institutional Holders

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