Personalis Ownership | Who Owns Personalis?

Overview Forecast RevenueFinancials Chart Transcripts

Personalis Ownership Summary

Personalis is owned by 17.93% institutional investors, 27.01% insiders, and 55.06% retail investors. Merck is the largest institutional shareholder, holding 15.22% of PSNL shares. ARK Genomic Revolution ETF is the top mutual fund, with 7.66% of its assets in Personalis shares.

PSNL Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Personalis	17.93%	27.01%	55.06%
Sector	Healthcare Stocks	35.58%	11.87%	52.55%
Industry	Diagnostics & Research Stocks	50.92%	10.77%	38.30%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Merck	14.04M	15.22%	$89.47M
Lightspeed management	8.16M	8.84%	$51.98M
Ark investment management	7.94M	8.61%	$50.60M
Ameriprise financial	7.59M	8.23%	$48.37M
Blackrock	3.29M	6.50%	$3.85M
Blackrock funding, inc. /de	5.39M	5.84%	$34.33M
T. rowe price investment management	4.76M	5.16%	$30.31M
Abrdn	3.49M	3.78%	$22.22M
Vanguard group	3.25M	3.67%	$25.90M
Deep track capital, lp	3.00M	3.25%	$19.11M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Merck	14.04M	25.60%	$89.47M
Blue water life science advisors, lp	1.68M	8.56%	$10.68M
Lightspeed management	8.16M	5.26%	$51.98M
Aigh capital management	2.90M	2.52%	$18.47M
Perkins capital management	239.00K	1.43%	$1.52M
Nano cap new millennium growth fund l p	235.00K	1.40%	$1.50M
Casdin capital	1.60M	0.77%	$10.19M
Pfm health sciences, lp	870.10K	0.51%	$5.54M
Wellington shields	292.49K	0.47%	$1.86M
Bruce	233.00K	0.42%	$1.48M

Top Buyers

Holder	Shares	% Assets	Change
Deep track capital, lp	3.00M	0.31%	3.00M
Casdin capital	1.60M	0.77%	1.60M
Ameriprise financial	7.59M	0.01%	1.31M
Jpmorgan chase	575.49K	0.00%	548.77K
Kennedy capital management	2.18M	0.29%	470.92K

Top Sellers

Holder	Shares	% Assets	Change
T. rowe price investment management	4.76M	0.02%	-6.02M
Marshall wace, llp	-	-	-696.29K
Next century growth investors	-	-	-624.36K
Exoduspoint capital management, lp	-	-	-437.37K
Jane street group	-	-	-171.17K

New Positions

Holder	Shares	% Assets	Change	Value
Deep track capital, lp	3.00M	0.31%	3.00M	$19.11M
Casdin capital	1.60M	0.77%	1.60M	$10.19M
Vanguard fiduciary trust	339.51K	0.00%	339.51K	$2.16M
Balyasny asset management	308.70K	0.00%	308.70K	$1.97M
Adage capital partners gp	300.00K	0.00%	300.00K	$1.91M

Sold Out

Holder	Change
Srs capital advisors	-9.00
Rockefeller capital management	-36.00
Signaturefd	-57.00
Org partners	-100.00
Nelson, van denburg & campbell wealth management group	-100.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	61	-53.44%	16,545,494	-79.57%	17	0.21%	31	-52.31%	18	-55.00%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
ARK Genomic Revolution ETF	8.02M	7.66%	339.29K
ARK Genomic Revolution	7.56M	7.22%	-13.15K
CT (Lux) American Smaller Com 9U USD	2.77M	2.64%	-259.83K
abrdn Healthcare Investors	2.43M	2.32%	371.71K
Vanguard Total Stock Mkt Idx Inv	2.19M	2.09%	-
Columbia Small Cap Growth	1.87M	1.79%	-256.47K
Columbia Small Cap Growth Inst	1.87M	1.79%	-
abrdn Life Sciences Investors	1.59M	1.52%	161.64K
Nikko Gbl All Biological Genome Eq MF	932.69K	1.41%	-150.91K
CT American Smaller Coms(US) InstAccGBP	1.45M	1.39%	-142.14K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jun 04, 2026	Tachibana Aaron	CFO AND COO	Sell	$480.40K
May 29, 2026	Hall Christopher M	Chief Executive Officer	Sell	$882.60K
May 29, 2026	Tachibana Aaron	CFO AND COO	Sell	$449.29K
Dec 22, 2025	Tempus AI, Inc.	-	Buy	$250.04K
Dec 19, 2025	Tempus AI, Inc.	-	Buy	$248.69K

Insider Transactions Trends

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

PSNL Ownership FAQ

Who Owns Personalis?

Personalis shareholders are primarily institutional investors at 17.93%, followed by 27.01% insiders and 55.06% retail investors. The average institutional ownership in Personalis's industry, Diagnostics & Research Stocks, is 50.92%, which Personalis falls below.

Who owns the most shares of Personalis?

Personalis’s largest shareholders are Merck (14.04M shares, 15.22%), Lightspeed management (8.16M shares, 8.84%), and Ark investment management (7.94M shares, 8.61%). Together, they hold 32.67% 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 25.60% of its assets in 14.04M Personalis shares, valued at 89.47M$.

Who is the top mutual fund holder of Personalis shares?

ARK Genomic Revolution ETF is the top mutual fund holder of Personalis shares, with 7.66% of its total shares outstanding invested in 8.02M Personalis shares.

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