Personalis PSNL Institutional Ownership

NASDAQ PSNL

$15.94 +0.06 (+0.38%)

At close: Oct 20, 2026 · 4:00 PM EDT

Institutions by Trading Activity

158 Institutions

Increased 112 70.9%

Unchanged 12 7.6%

Reduced 34 21.5%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

79.88%

▼-0.92 pp QoQ

Shares Held by Institutions

84.97Mn

of 106.37Mn outstanding

▲+0.45% QoQ

Shares Outstanding

106.37Mn

21.40Mn held outside 13F filers

Institutional Investors

158

filed 13F for Jun 2026

▲+19 vs prior quarter

Net Shares Added (QoQ)

+376.71K

accumulated since last quarter

Value of Holdings

$1.35Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 11, 2026

Personalis, Inc. (NASDAQ:PSNL) was reported as a holding by 158 institutional investors in 13F filings for the quarter ended June 30, 2026.

Their combined stake equaled 79.88% of outstanding shares in Q2 2026, down from 80.80% in Q1 2026.
Total shares held in Personalis rose 0.45% from Q1 2026, while the number of holders rose 53.40% from Q2 2025.
Looking at the 158 holders of PSNL individually, 112 added to their positions, 34 reduced their stakes and 12 left their positions unchanged.
Altogether, institutional holders owned 84.97Mn PSNL shares at the end of Q2 2026, up 376.71K from the prior quarter and up 25.39Mn from a year earlier.
Merck & Co., Inc. held the largest position in PSNL at 14.04Mn shares as of June 30, 2026, or 13.20% of shares outstanding.
Holders that added the most shares of Personalis in Q2 2026 were Bank of America Corp (+1.71Mn shares), BlackRock, Inc. (+1.69Mn shares), Morgan Stanley (+1.03Mn shares), Deep Track Capital, LP (+1Mn shares) and Casdin Capital, LLC (+950K shares).
On the other side, among holders that kept a position in Personalis, the largest reductions in Q2 2026 came from Lightspeed Management Company, L.L.C. (-2.06Mn shares), Ameriprise Financial Inc (-1.51Mn shares), T. Rowe Price Associates Inc (-1.49Mn shares), AIGH Capital Management LLC (-1.19Mn shares) and JPMorgan Chase & Co (-532.92K shares).
Per Business Quant data, the 10 largest holders of Personalis at the end of Q2 2026 were Merck & Co., Inc. (14.04Mn shares), ARK Investment Management LLC (8.27Mn shares), BlackRock, Inc. (7.08Mn shares), Lightspeed Management Company, L.L.C. (6.1Mn shares), Ameriprise Financial Inc (6.09Mn shares), Deep Track Capital, LP (4Mn shares), Aberdeen Group plc (3.75Mn shares), Vanguard Capital Management LLC (3.01Mn shares), Casdin Capital, LLC (2.55Mn shares) and Kennedy Capital Management LLC (2.36Mn shares).

Form 13F Holdings

158 Institutional Holders

Report period 30 Jun, 2026

Total shares held 84.97Mn

Of outstanding 79.88%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	Merck & Co., Inc.	0000310158	14,044,943	13.20%	0	0.00%	$188.20Mn
2	ARK Investment Management LLC	0001697748	8,271,339	7.78%	▲327,227	+4.12%	$110.84Mn
3	BlackRock, Inc.	0002012383	7,082,491	6.66%	▲1,692,606	+31.40%	$94.91Mn
4	Lightspeed Management Company, L.L.C.	0001702122	6,101,850	5.74%	▼2,058,884	-25.23%	$81.76Mn
5	Ameriprise Financial Inc	0000820027	6,086,315	5.72%	▼1,506,492	-19.84%	$81.56Mn
6	Deep Track Capital, LP	0001856083	4,000,000	3.76%	▲1,000,000	+33.33%	$53.60Mn
7	Aberdeen Group plc	0001716774	3,747,290	3.52%	▲258,982	+7.42%	$50.21Mn
8	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	3,010,150	2.83%	▲141,687	+4.94%	$40.34Mn
9	Casdin Capital, LLC	0001534261	2,550,000	2.40%	▲950,000	+59.38%	$34.17Mn
10	KENNEDY CAPITAL MANAGEMENT LLC	0000884589	2,364,282	2.22%	▲180,710	+8.28%	$31.68Mn
11	GEODE CAPITAL MANAGEMENT, LLC	0001214717	1,822,445	1.71%	▲524,790	+40.44%	$24.43Mn
12	Bank Of America Corp /De/	0000070858	1,820,541	1.71%	▲1,709,235	+1,535.62%	$24.40Mn
13	AIGH Capital Management LLC	0001835943	1,715,000	1.61%	▼1,185,000	-40.86%	$22.98Mn
14	Blue Water Life Science Advisors, LP	0001789778	1,676,300	1.58%	0	0.00%	$22.46Mn
15	DIMENSIONAL FUND ADVISORS LP	0000354204	1,496,983	1.41%	▲430,735	+40.40%	$20.06Mn
16	State Street Corp	0000093751	1,487,077	1.40%	▲352,907	+31.12%	$19.93Mn
17	Morgan Stanley	0000895421	1,270,946	1.19%	▲1,033,631	+435.55%	$17.03Mn
18	Goldman Sachs Group Inc	0000886982	931,031	0.88%	▲193,899	+26.30%	$12.48Mn
19	HRT FINANCIAL LP	0001475597	930,816	0.88%	▲721,925	+345.60%	$12.47K
20	Nuveen, LLC	0001871926	753,004	0.71%	▲409,484	+119.20%	$10.09Mn

Showing 1 to 20 of 158 holders