Personalis Ownership | Who Owns Personalis?

Overview Forecast RevenueFinancials Chart Transcripts

Personalis Ownership Summary

Personalis is owned by 40.16% institutional investors, 31.64% insiders, and 28.20% retail investors. Merck is the largest institutional shareholder, holding 15.87% of PSNL shares. ARK Genomic Revolution ETF is the top mutual fund, with 8.03% of its assets in Personalis shares.

PSNL Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Personalis	40.16%	31.64%	28.20%
Sector	Healthcare Stocks	232.01%	10.74%	-142.75%
Industry	Diagnostics & Research Stocks	35.38%	11.00%	53.62%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Merck	14.04M	15.87%	$91.57M
Lightspeed management	8.16M	9.22%	$53.21M
Ark investment management	7.88M	8.88%	$62.72M
Blackrock	3.29M	6.50%	$3.85M
Blackrock funding, inc. /de	5.32M	6.00%	$42.34M
Vanguard group	3.25M	3.67%	$25.90M
Abrdn	3.25M	3.66%	$25.87M
Aigh capital management	2.90M	3.27%	$23.08M
T. rowe price investment management	2.88M	3.26%	$18.80M
Kennedy capital management	1.94M	2.19%	$12.62M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Merck	14.04M	40.16%	$91.57M
Lightspeed management	8.16M	16.53%	$53.21M
Blue water life science advisors, lp	1.68M	9.97%	$10.93M
Aigh capital management	2.90M	5.59%	$23.08M
Nano cap new millennium growth fund l p	290.00K	1.97%	$2.31B
Perkins capital management	239.00K	1.51%	$1.90M
Wellington shields	292.49K	0.57%	$2.33M
Bruce	253.00K	0.51%	$1.65M
Green alpha advisors	68.52K	0.50%	$545.39K
Ark investment management	7.88M	0.42%	$62.72M

Top Buyers

Holder	Shares	% Assets	Change
T. rowe price investment management	2.88M	0.01%	1.62M
Kennedy capital management	1.94M	0.28%	1.28M
Abrdn	3.25M	0.04%	861.95K
Susquehanna group, llp	873.10K	0.00%	718.34K
Nano cap new millennium growth fund l p	290.00K	1.97%	290.00K

Top Sellers

Holder	Shares	% Assets	Change
Millennium management	1.32M	0.00%	-1.12M
Aigh capital management	2.90M	5.59%	-992.10K
Marshall wace, llp	-	-	-696.29K
Exoduspoint capital management, lp	-	-	-437.37K
Renaissance	92.99K	0.00%	-360.05K

New Positions

Holder	Shares	% Assets	Change	Value
Nano cap new millennium growth fund l p	290.00K	1.97%	290.00K	$2.31B
Jane street group	171.17K	0.00%	171.17K	$1.36M
D.a. davidson	145.51K	0.01%	145.51K	$1.16M
Hrt financial lp	97.77K	0.00%	97.77K	$778.00K
Sei investments	56.01K	0.00%	56.01K	$445.81K

Sold Out

Holder	Change
Redwood wealth management group	-100.00
Nelson, van denburg & campbell wealth management group	-100.00
Org partners	-100.00
Principal securities	-134.00
Rise advisors	-142.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	91	-19.47%	35,625,946	-45.03%	40	0.75%	49	-9.26%	28	-17.65%
Sep 30, 2025	109	0.93%	64,542,322	6.76%	72	1.56%	52	-26.76%	32	33.33%
Jun 30, 2025	107	0.94%	60,437,524	85.26%	68	4.91%	69	13.11%	25	-10.71%
Mar 31, 2025	108	-0.92%	54,828,815	6.28%	62	0.88%	62	12.73%	28	-20.00%
Dec 31, 2024	59	-32.18%	23,614,794	-19.46%	38	1.68%	25	-37.50%	22	-24.14%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
ARK Genomic Revolution ETF	8.23M	8.03%	-
ARK Genomic Revolution	7.57M	7.39%	-111.50K
T. Rowe Price Small-Cap Stock	3.56M	3.47%	2.67M
T. Rowe Price US Small-Cap Core Equity	3.56M	3.47%	2.83M
CT (Lux) American Smaller Com 9U USD	2.27M	2.22%	1.15M
Columbia Small Cap Growth	2.13M	2.08%	2.13M
Columbia Small Cap Growth Inst	2.13M	2.08%	310.29K
T. Rowe Price Instl Small-Cap Stock	1.94M	1.89%	1.57M
abrdn Healthcare Investors	1.90M	1.85%	-
Vanguard Total Stock Mkt Idx Inv	1.66M	1.62%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Dec 17, 2025	Tempus AI, Inc.	-	Buy	$248.77K
Dec 22, 2025	Tempus AI, Inc.	-	Buy	$250.04K
Dec 18, 2025	Tempus AI, Inc.	-	Buy	$248.61K
Dec 19, 2025	Tempus AI, Inc.	-	Buy	$248.69K
Nov 25, 2025	Tempus AI, Inc.	-	Buy	$152.77K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	1
2025 Q4	-	2
2025 Q3	-	2
2025 Q2	-	3
2025 Q1	-	2

PSNL Ownership FAQ

Who Owns Personalis?

Personalis shareholders are primarily institutional investors at 40.16%, followed by 31.64% insiders and 28.20% retail investors. The average institutional ownership in Personalis's industry, Diagnostics & Research Stocks, is 35.38%, which Personalis exceeds.

Who owns the most shares of Personalis?

Personalis’s largest shareholders are Merck (14.04M shares, 15.87%), Lightspeed management (8.16M shares, 9.22%), and Ark investment management (7.88M shares, 8.88%). Together, they hold 33.97% of Personalis’s total shares outstanding.

Does Blackrock own Personalis?

Yes, BlackRock owns 6.50% of Personalis, totaling 3.29M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 3.85M$. In the last quarter, BlackRock increased its holdings by 11.39K shares, a 0.35% change.

Who is Personalis’s biggest shareholder by percentage of total assets invested?

Merck is Personalis’s biggest shareholder by percentage of total assets invested, with 40.16% of its assets in 14.04M Personalis shares, valued at 91.57M$.

Who is the top mutual fund holder of Personalis shares?

ARK Genomic Revolution ETF is the top mutual fund holder of Personalis shares, with 8.03% of its total shares outstanding invested in 8.23M Personalis shares.

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