Vault-13

PERSONALIS INC PSNL

COM · Common Stock · CUSIP 71535D106

Company in Menlo Park, United States

72 institutional holders +2 vs Q4 2023
22,511,13422.5m shares reported held*
43.3% of all shares outstanding*
$33.5mreported value*
8 new 27 added 23 reduced 6 sold out net bought ≈ $618.9k (+412.6k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 51.9m as of 2024-04-29, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $1.49. Options: 4 managers hold calls ($4.2k notional), 2 hold puts ($745).

Trends to Q1 2024

Institutional holders

Managers reporting a position, each quarter

050100Q3 22: 81Q4 22: 81Q1 23: 64Q2 23: 67Q3 23: 64Q4 23: 70Q1 24: 7272Q3 22Q1 23Q3 23Q1 24
Numbers
QuarterHolders
Q3 202281
Q4 202281
Q1 202364
Q2 202367
Q3 202364
Q4 202370
Q1 202472

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
50050Q4 22: 41 bought or addedQ4 22: 42 cut or sold outQ4 22Q1 23: 33 bought or addedQ1 23: 40 cut or sold outQ1 23Q2 23: 25 bought or addedQ2 23: 31 cut or sold outQ2 23Q3 23: 18 bought or addedQ3 23: 34 cut or sold outQ3 23Q4 23: 32 bought or addedQ4 23: 26 cut or sold outQ4 23Q1 24: 35 bought or addedQ1 24: 29 cut or sold outQ1 24
Numbers
QuarterBought or addedCut or sold out
Q4 20224142
Q1 20233340
Q2 20232531
Q3 20231834
Q4 20233226
Q1 20243529

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$10k$20k$30kQ2 23 calls: $3.8kQ2 23 puts: $6.6kQ2 23P/C 1.75Q3 23 calls: $0Q3 23 puts: $1.2kQ3 23P/C —Q4 23 calls: $21.2kQ4 23 puts: $0Q4 23P/C 0.00Q1 24 calls: $4.2kQ1 24 puts: $745Q1 24P/C 0.18
Numbers
QuarterCallsPutsP/C
Q2 2023$3.8k$6.6k1.75
Q3 2023$0$1.2k—
Q4 2023$21.2k$00.00
Q1 2024$4.2k$7450.18

Biggest buyers

JACOBS LEVY EQUITY MANAGEMENT, INC Added +485,822+485.8k
ACADIAN ASSET MANAGEMENT LLC Added +471,646+471.6k
RENAISSANCE TECHNOLOGIES LLC Added +256,700+256.7k
Man Group plc Added +235,629+235.6k
HOWLAND CAPITAL MANAGEMENT LLC Added +168,274+168.3k
MORGAN STANLEY Added +112,974+113.0k
CITADEL ADVISORS LLC Added +75,392+75.4k
MARSHALL WACE, LLP Added +59,221+59.2k
STATE OF MICHIGAN RETIREMENT SYSTEM Added +50,000+50.0k
Connor, Clark & Lunn Investment Management Ltd. Added +49,340+49.3k

Biggest sellers

ARK Investment Management LLC Reduced -606,072-606.1k
Pacific Heights Asset Management LLC Sold out -310,000-310.0k
D. E. Shaw & Co., Inc. Reduced -283,947-283.9k
VANGUARD GROUP INC Reduced -165,929-165.9k
Amova Asset Management Americas, Inc. Reduced -106,051-106.1k
Sumitomo Mitsui Trust Group, Inc. Reduced -106,051-106.1k
Quadrature Capital Ltd Sold out -73,001-73.0k
Wellington Shields Capital Management, LLC Reduced -40,900-40.9k
BlackRock Inc. Reduced -34,547-34.5k
MILLENNIUM MANAGEMENT LLC Reduced -33,160-33.2k

Biggest calls

GROUP ONE TRADING LLC Reduced $3.0k2.0k shares
CITADEL ADVISORS LLC Reduced $1.2k800 shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares
SIMPLEX TRADING, LLC New $0200 shares

Biggest puts

CITADEL ADVISORS LLC New $745500 shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Merck & Co., Inc. 13G · passive investor new · filed 2024-12-23 16.5% new 14.0m≈ $188.2m 2024-12-23
Tempus AI, Inc. 13D · may seek influence -1.9 pts · filed 2026-07-21
Stated purposeMerger Agreement Following conclusion of confidential preliminary discussions between the Issuer and Tempus, and in response to the Issuer's request for Tempus to submit a proposal, on July 19, 2026, Tempus submitted a non-binding proposal to acquire all of the outstanding Common Stock of the Issuer. On July 20, 2026, Tempus entered into an Agreement and Plan of Merger (the "Merger Agreement") with the Issuer, Aviary Development, Inc., a Delaware corporation and a direct, wholly owned subsidiary of Tempus ("Merger Sub I") and Toucan Development, LLC, a Nevada limited liability company and a direct, wholly owned subsidiary of Tempus ("Merger Sub II" and, together with Merger Sub I, the "Merger Subs"). Pursuant to the Merger Agreement, and upon the terms and subject to the conditions therei… Full filing
12.6% -1.9 pts 13.2m≈ $176.7m 2026-07-21
ARK Investment Management LLC 13G · institution -1.4 pts · filed 2025-05-14 8.1% -1.4 pts 7.2m≈ $96.3m 2025-05-14
BlackRock, Inc. 13G · institution +2.4 pts · filed 2026-07-29 5.9% +2.4 pts 6.2m≈ $82.7m 2026-07-29
AMERIPRISE FINANCIAL INC 13G · institution -1.3 pts · filed 2026-08-14 5.8% -1.3 pts 6.1m≈ $81.6m 2026-08-14

Fell to 5% or below in the last year: KEYWELL BRADLEY A (3.5%, 2026-10-28), Deep Track Capital, LP (3.8%, 2026-08-14), Lightspeed Venture Partners Select IV, L.P. (2.0%, 2026-06-10), T. Rowe Price Investment Management, Inc. (4.5%, 2026-04-08), HIRSCHMAN ORIN (3.8%, 2026-01-29), Red Sky Ventures LLC (4.7%, 2025-11-13)

Insider purchases and sales in Q1 2024

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
404Q2 22: 0 buyingQ2 22: 4 sellingQ3 22: 0 buyingQ3 22: 2 sellingQ3 22Q4 22: 0 buyingQ4 22: 3 sellingQ1 23: 0 buyingQ1 23: 2 sellingQ1 23Q2 23: 0 buyingQ2 23: 3 sellingQ3 23: 0 buyingQ3 23: 2 sellingQ3 23Q4 23: 0 buyingQ4 23: 4 sellingQ1 24: 1 buyingQ1 24: 2 sellingQ1 24
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q2 20220—4$113.9k—
Q3 20220—2$35.3k—
Q4 20220—3$58.5k—
Q1 20230—2$17.8k—
Q2 20230—3$47.3k—
Q3 20230—2$2.6k—
Q4 20230—4$42.2k—
Q1 20241$16.7k2$1.7k—
DateInsiderTradeSharesPrice ValueTheir holding
2024-03-01 MYERS WOODROW A JR Director Bought 10,000 $1.67 $16.7k10.0k shares +62%
2024-01-29 Tachibana Aaron CFO AND COO Sold 716 $1.37 $981716 shares -<1%
2024-01-29 Chen Richard CHIEF MEDICAL OFFICER AND EVP Sold 526 $1.37 $721526 shares -<1%

Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).

Holders, Q1 2024

#ManagerLocationShares Value% of their portfolioChangeShares change
1 ARK Investment Management LLC 0.06% of their portfolio ST. PETERSBURG, FL 6,065,4736.1m $9.0m $9.0m 0.06% Reduced -606.1k -606,072
2 BlackRock Inc. 0.00% of their portfolio New York, NY 3,280,7213.3m $4.9m $4.9m 0.00% Reduced -34.5k -34,547
3 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 1,904,1651.9m $2.8m $2.8m 0.00% Reduced -165.9k -165,929
4 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 1,097,5111.1m $1.6m $1.6m 0.00% Added +256.7k +256,700
5 ACADIAN ASSET MANAGEMENT LLC 0.01% of their portfolio Boston, MA 991,828991.8k $1.5m $1.5m 0.01% Added +471.6k +471,646
6 Sumitomo Mitsui Trust Group, Inc. 0.00% of their portfolio CHIYODA-KU, TOKYO, M0 977,634977.6k $1.5m $1.5m 0.00% Reduced -106.1k -106,051
7 Amova Asset Management Americas, Inc. 0.01% of their portfolio New York, NY 977,634977.6k $1.5m $1.5m 0.01% Reduced -106.1k -106,051
8 JACOBS LEVY EQUITY MANAGEMENT, INC 0.01% of their portfolio FLORHAM PARK, NJ 821,657821.7k $1.2m $1.2m 0.01% Added +485.8k +485,822
9 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 507,537507.5k $756.2k $756.2k 0.00% Added +75.4k +75,392
10 STATE OF MICHIGAN RETIREMENT SYSTEM 0.00% of their portfolio EAST LANSING, MI 493,798493.8k $735.8k $735.8k 0.00% Added +50.0k +50,000
11 Wellington Shields Capital Management, LLC 0.12% of their portfolio NEW YORK, NY 436,931436.9k $651.0k $651.0k 0.12% Reduced -40.9k -40,900
12 GSA CAPITAL PARTNERS LLP 0.05% of their portfolio LONDON, X0 420,141420.1k $626.0k $626.0k 0.05% Added +24.5k +24,498
13 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 395,022395.0k $588.7k $588.7k 0.00% Added +5.3k +5,313
14 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 359,718359.7k $536.0k $536.0k 0.00% Added +113.0k +112,974
15 Bruce & Co., Inc. 0.15% of their portfolio CHICAGO, IL 300,000300.0k $447.0k $447.0k 0.15% Unchanged
16 Wellington Shields & Co., LLC 0.15% of their portfolio NEW YORK, NY 294,097294.1k $438.2k $438.2k 0.15% Unchanged
17 Man Group plc 0.00% of their portfolio LONDON, X0 292,169292.2k $435.3k $435.3k 0.00% Added +235.6k +235,629
18 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 233,737233.7k $348.3k $348.3k 0.00% Reduced -33.2k -33,160
19 HOWLAND CAPITAL MANAGEMENT LLC 0.02% of their portfolio BOSTON, MA 211,118211.1k $314.6k $314.6k 0.02% Added +168.3k +168,274
20 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 211,028211.0k $314.4k $314.4k 0.00% Added +18.1k +18,075
21 MARSHALL WACE, LLP 0.00% of their portfolio LONDON, X0 210,902210.9k $314.2k $314.2k 0.00% Added +59.2k +59,221
22 D. E. Shaw & Co., Inc. 0.00% of their portfolio New York, NY 181,295181.3k $270.1k $270.1k 0.00% Reduced -283.9k -283,947
23 BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.00% of their portfolio HOUSTON, TX 135,600135.6k $202.0k $202.0k 0.00% Added +6.1k +6,100
24 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 130,242130.2k $194.1k $194.1k 0.00% Unchanged
25 XTX Topco Ltd 0.03% of their portfolio LONDON, X0 129,558129.6k $193.0k $193.0k 0.03% Added +10.2k +10,153
26 Green Alpha Advisors, LLC 0.13% of their portfolio NIWOT, CO 118,953119.0k $177.2k $177.2k 0.13% Reduced -352 -352
27 TWO SIGMA ADVISERS, LP 0.00% of their portfolio NEW YORK, NY 104,900104.9k $156.3k $156.3k 0.00% Reduced -1.4k -1,400
28 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 95,00095.0k $142.0k $142.0k 0.00% Added +34.9k +34,900
29 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 85,59085.6k $127.5k $127.5k 0.00% Reduced -22.0k -21,972
30 Squarepoint Ops LLC 0.00% of their portfolio NEW YORK, NY 81,54281.5k $121.5k $121.5k 0.00% Added +37.3k +37,344
31 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 75,89175.9k $113.0k $113.0k 0.00% Reduced -18.3k -18,300
32 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 74,55874.6k $111.1k $111.1k 0.00% Reduced -24.0k -24,001
33 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 72,37372.4k $107.8k $107.8k 0.00% Reduced -21.7k -21,671
34 Connor, Clark & Lunn Investment Management Ltd. 0.00% of their portfolio VANCOUVER, A1 64,41364.4k $96.0k $96.0k 0.00% Added +49.3k +49,340
35 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 63,55163.6k $94.7k $94.7k 0.00% Added +44.1k +44,111
36 HSBC HOLDINGS PLC 0.00% of their portfolio LONDON, X0 45,46545.5k $67.7k $67.7k 0.00% Unchanged
37 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 45,02445.0k $67.1k $67.1k 0.00% Unchanged
38 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 42,40942.4k $63.0k $63.0k 0.00% Added +31.7k +31,670
39 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 39,94839.9k $59.5k $59.5k 0.00% New
40 Cubist Systematic Strategies, LLC 0.00% of their portfolio STAMFORD, CT 36,97637.0k $55.1k $55.1k 0.00% Added +25.9k +25,886
41 Pathstone Holdings, LLC 0.00% of their portfolio ENGLEWOOD, NJ 36,01336.0k $53.7k $53.7k 0.00% Reduced -383 -383
42 PRUDENTIAL FINANCIAL INC 0.00% of their portfolio NEWARK, NJ 33,75033.8k $50.3k $50.3k 0.00% Added +5.6k +5,600
43 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 30,96231.0k $46.1k $46.1k 0.00% Reduced -28.5k -28,549
44 Prime Capital Investment Advisors, LLC 0.00% of their portfolio OVERLAND PARK, KS 28,11428.1k $41.9k $41.9k 0.00% Added +348 +348
45 Virtu Financial LLC 0.00% of their portfolio New York, NY 27,66427.7k $41.0k $41.0k 0.00% New
46 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 25,02625.0k $37.3k $37.3k 0.00% New
47 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 22,94122.9k $34.2k $34.2k 0.00% Unchanged
48 IEQ CAPITAL, LLC 0.00% of their portfolio Foster City, CA 22,00022.0k $32.8k $32.8k 0.00% Unchanged
49 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 21,14421.1k $31.5k $31.5k 0.00% Reduced -1.1k -1,090
50 PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.00% of their portfolio COLUMBUS, OH 19,70019.7k $29.4k $29.4k 0.00% New
51 Board of Trustees of The Leland Stanford Junior University 0.00% of their portfolio STANFORD, CA 18,94818.9k $28.2k $28.2k 0.00% Reduced -3.2k -3,157
52 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 17,30417.3k $25.8k $25.8k 0.00% Reduced -22.1k -22,099
53 Parallel Advisors, LLC 0.00% of their portfolio SAN FRANCISCO, CA 16,52216.5k $24.6k $24.6k 0.00% Unchanged
54 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 16,11216.1k $24.0k $24.0k 0.00% Added +2.6k +2,568
55 HoyleCohen, LLC 0.00% of their portfolio SAN DIEGO, CA 15,37315.4k $22.9k $22.9k 0.00% Unchanged
56 Banque Cantonale Vaudoise 0.00% of their portfolio LAUSANNE, V8 15,00015.0k $22.0k $22.0k 0.00% Added +5.0k +5,000
57 UBS Group AG 0.00% of their portfolio ZURICH, V8 11,21111.2k $16.7k $16.7k 0.00% Added +981 +981
58 US BANCORP \DE\ 0.00% of their portfolio MINNEAPOLIS, MN 9,1009.1k $13.6k $13.6k 0.00% New
59 Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio ZURICH, V8 5,0235.0k $7.5k $7.5k 0.00% Reduced -167 -167
60 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 3,7093.7k $5.5k $5.5k 0.00% Unchanged
61 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 3,4513.5k $5.1k $5.1k 0.00% Reduced -755 -755
62 Qube Research & Technologies Ltd 0.00% of their portfolio LONDON, X0 3,2163.2k $4.8k $4.8k 0.00% Added +100 +100
63 WR Wealth Planners, LLC 0.00% of their portfolio COLUMBIA, MO 1,2001.2k $1.8k $1.8k 0.00% New
64 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 400400 $596 $596 0.00% Reduced -1.4k -1,372
65 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 307307 $457 $457 0.00% Added +5 +5
66 COMERICA BANK 0.00% of their portfolio DALLAS, TX 283283 $422 $422 0.00% Unchanged
67 PRINCIPAL SECURITIES, INC. 0.00% of their portfolio DES MOINES, IA 231231 $344 $344 0.00% Reduced -19 -19
68 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 135135 $201 $201 0.00% Unchanged
69 Avior Wealth Management, LLC 0.00% of their portfolio OMAHA, NE 100100 $149 $149 0.00% New
70 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 8585 $127 $127 0.00% New
71 GROUP ONE TRADING LLC 0.00% of their portfolio CHICAGO, IL 11 $1 $1 0.00% Unchanged
72 CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio BIRMINGHAM, AL 00 $0 $0 0.00% Unchanged