Personalis Ownership | Who Owns Personalis?

Overview Forecast RevenueFinancials Chart Transcripts

Personalis Ownership Summary

Personalis is owned by 68.28% institutional investors, 31.36% insiders, and 0.37% retail investors. Merck is the largest institutional shareholder, holding 15.87% of PSNL shares. ARK Genomic Revolution is the top mutual fund, with 7.84% of its assets in Personalis shares.

PSNL Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Personalis	68.28%	31.36%	0.37%
Sector	Healthcare Stocks	488.17%	11.08%	-399.26%
Industry	Diagnostics & Research Stocks	57.60%	10.69%	31.72%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Merck	14.04M	15.87%	$92.13M
Ark investment management	7.11M	8.03%	$46.63M
Blackrock	3.29M	6.50%	$3.85M
Blackrock funding, inc. /de	5.20M	5.88%	$34.14M
Aigh capital management	3.72M	4.21%	$24.43M
Vanguard group	1.73M	2.84%	$10.03M
Millennium management	1.32M	2.16%	$7.61M
Abrdn	1.76M	1.99%	$11.54M
Blue water life science advisors, lp	1.68M	1.89%	$11.00M
Renaissance	920.87K	1.51%	$5.32M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Merck	14.04M	42.73%	$92.13M
Aigh capital management	3.72M	10.99%	$24.43M
Blue water life science advisors, lp	1.68M	8.70%	$11.00M
Perkins capital management	252.50K	1.67%	$1.66M
Wellington shields	292.49K	0.54%	$1.92M
Bruce	253.00K	0.54%	$1.66M
Wellington shields capital management	426.33K	0.47%	$2.80M
Ark investment management	7.11M	0.34%	$46.63M
Green alpha advisors	31.84K	0.20%	$208.86K
Kennedy capital management	653.38K	0.10%	$4.29M

Top Buyers

Holder	Shares	% Assets	Change
Blackrock funding, inc. /de	5.20M	0.00%	2.21M
T. rowe price investment management	1.26M	0.01%	1.26M
Susquehanna group, llp	873.10K	0.00%	718.34K
Blue water life science advisors, lp	1.68M	8.70%	500.90K
Exoduspoint capital management, lp	437.37K	0.03%	403.20K

Top Sellers

Holder	Shares	% Assets	Change
Millennium management	1.32M	0.00%	-1.12M
Marshall wace, llp	-	-	-696.29K
Qube research	19.24K	0.00%	-383.04K
Acadian asset management	39.16K	0.00%	-271.36K
Jane street group	-	-	-247.01K

New Positions

Holder	Shares	% Assets	Change	Value
T. rowe price investment management	1.26M	0.01%	1.26M	$8.29M
Polar asset management partners	71.70K	0.01%	71.70K	$470.35K
Mach-1 financial group	48.82K	0.09%	48.82K	$320.27K
Intech investment management	26.32K	0.00%	26.32K	$172.64K
Mariner	16.39K	0.00%	16.39K	$107.49K

Sold Out

Holder	Change
Nelson, van denburg & campbell wealth management group	-100.00
Redwood wealth management group	-100.00
Org partners	-100.00
Creative planning	-157.00
Signaturefd	-257.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Sep 30, 2024	87	24.29%	29,319,370	33.53%	48	2.56%	40	110.53%	29	-
Jun 30, 2024	70	-4.11%	21,956,674	-1.41%	43	2.03%	19	-44.12%	29	20.83%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
ARK Genomic Revolution	6.95M	7.84%	-118.85K
ARK Genomic Revolution ETF	6.89M	7.80%	-41.30K
Vanguard Total Stock Mkt Idx Inv	1.74M	1.97%	-38.65K
Nikko Gbl All Biological Genome Eq MF	932.69K	1.41%	-150.91K
Vanguard US Total Market Shares ETF	1.21M	1.37%	-
iShares Russell 2000 ETF	1.21M	1.37%	-23.00K
abrdn Healthcare Investors	973.60K	1.10%	93.80K
abrdn Life Sciences Investors	917.02K	1.03%	37.32K
T. Rowe Price Small-Cap Value	765.80K	0.87%	765.80K
Vanguard Institutional Extnd Mkt Idx Tr	672.09K	0.76%	-294.03K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jul 28, 2025	Chen Richard	CHIEF MEDICAL OFFICER AND EVP	Sell	$2.97K
Jul 28, 2025	Tachibana Aaron	CFO AND COO	Sell	$4.21K
May 16, 2025	Tachibana Aaron	CFO AND COO	Sell	$6.39K
May 16, 2025	Moore Stephen Michael	SVP and Chief Legal Officer	Sell	$8.29K
May 16, 2025	Chen Richard	CHIEF MEDICAL OFFICER AND EVP	Sell	$4.50K

Insider Transactions Trends

Date	Buy	Sell
2025 Q3	-	2
2025 Q2	-	3
2025 Q1	-	2
2024 Q4	-	7
2024 Q3	1	2

PSNL Ownership FAQ

Who Owns Personalis?

Personalis shareholders are primarily institutional investors at 68.28%, followed by 31.36% insiders and 0.36% retail investors. The average institutional ownership in Personalis's industry, Diagnostics & Research Stocks, is 57.60%, which Personalis exceeds.

Who owns the most shares of Personalis?

Personalis’s largest shareholders are Merck (14.04M shares, 15.87%), Ark investment management (7.11M shares, 8.03%), and Blackrock (3.29M shares, 6.50%). Together, they hold 30.39% 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 42.73% of its assets in 14.04M Personalis shares, valued at 92.13M$.

Who is the top mutual fund holder of Personalis shares?

ARK Genomic Revolution is the top mutual fund holder of Personalis shares, with 7.84% of its total shares outstanding invested in 6.95M Personalis shares.

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