Vault-13

PERSONALIS INC PSNL

COM · Common Stock · CUSIP 71535D106

Company in Menlo Park, United States

70 institutional holders +6 vs Q3 2023
22,098,49522.1m shares reported held*
45.1% of all shares outstanding*
$46.4mreported value*
12 new 20 added 18 reduced 8 sold out net sold ≈ $5.7m (-2.6m 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: 49.0m as of 2023-10-30, 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 ≈ $2.10. Options: 3 managers hold calls ($21.2k notional), 2 hold puts ($0).

Trends to Q4 2023

Institutional holders

Managers reporting a position, each quarter

050100Q3 22: 81Q4 22: 81Q1 23: 64Q2 23: 67Q3 23: 64Q4 23: 7070Q3 22Q4 22Q1 23Q2 23Q3 23Q4 23
Numbers
QuarterHolders
Q3 202281
Q4 202281
Q1 202364
Q2 202367
Q3 202364
Q4 202370

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 23
Numbers
QuarterBought or addedCut or sold out
Q4 20224142
Q1 20233340
Q2 20232531
Q3 20231834
Q4 20233226

Calls vs puts

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

CallsPuts
$0$50k$100k$150k$200kQ1 23 calls: $167.5kQ1 23 puts: $24.8kQ1 23P/C 0.15Q2 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 0.00
Numbers
QuarterCallsPutsP/C
Q1 2023$167.5k$24.8k0.15
Q2 2023$3.8k$6.6k1.75
Q3 2023$0$1.2k—
Q4 2023$21.2k$00.00

Biggest buyers

ARK Investment Management LLC Added +952,118+952.1k
CITADEL ADVISORS LLC Added +309,839+309.8k
RENAISSANCE TECHNOLOGIES LLC Added +288,336+288.3k
GSA CAPITAL PARTNERS LLP Added +258,285+258.3k
MILLENNIUM MANAGEMENT LLC Added +152,003+152.0k
MARSHALL WACE, LLP New +151,681+151.7k
Bruce & Co., Inc. Added +150,000+150.0k
ACADIAN ASSET MANAGEMENT LLC Added +145,045+145.0k
MORGAN STANLEY Added +139,454+139.5k
XTX Topco Ltd New +119,405+119.4k

Biggest sellers

JPMORGAN CHASE & CO Reduced -3,534,345-3.5m
Alyeska Investment Group, L.P. Sold out -1,245,668-1.2m
Wellington Shields & Co., LLC Reduced -310,170-310.2k
Wellington Shields Capital Management, LLC Reduced -179,906-179.9k
DIMENSIONAL FUND ADVISORS LP Reduced -109,776-109.8k
JACOBS LEVY EQUITY MANAGEMENT, INC Reduced -109,068-109.1k
AMERIPRISE FINANCIAL INC Sold out -108,707-108.7k
Man Group plc Sold out -106,438-106.4k
BRIDGEWAY CAPITAL MANAGEMENT, LLC Reduced -25,000-25.0k
TWO SIGMA INVESTMENTS, LP Sold out -21,600-21.6k

Biggest calls

GROUP ONE TRADING LLC New $19.3k9.2k shares
CITADEL ADVISORS LLC New $1.9k900 shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

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 Q4 2023

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
404Q1 22: 0 buyingQ1 22: 3 sellingQ2 22: 0 buyingQ2 22: 4 sellingQ2 22Q3 22: 0 buyingQ3 22: 2 sellingQ4 22: 0 buyingQ4 22: 3 sellingQ4 22Q1 23: 0 buyingQ1 23: 2 sellingQ2 23: 0 buyingQ2 23: 3 sellingQ2 23Q3 23: 0 buyingQ3 23: 2 sellingQ4 23: 0 buyingQ4 23: 4 sellingQ4 23
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q1 20220—3——
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—
DateInsiderTradeSharesPrice ValueTheir holding
2023-12-15 Tachibana Aaron CFO and COO Sold 6,747 $1.47 $9.9k6.7k shares -4%
2023-12-15 Chen Richard Chief Medical Officer and EVP Sold 4,708 $1.47 $6.9k4.7k shares -4%
2023-12-15 Moore Stephen Michael General Counsel Sold 1,476 $1.47 $2.2k1.5k shares -2%
2023-11-16 Moore Stephen Michael General Counsel Sold 1,722 $1.04 $1.8k1.7k shares -2%
2023-11-16 Tachibana Aaron CFO and COO Sold 1,344 $1.04 $1.4k1.3k shares -1%
2023-11-16 Chen Richard Chief Medical Officer and EVP Sold 940 $1.04 $978940 shares -1%
2023-11-01 Hall Christopher M President and CEO, director Sold 20,459 $0.93 $19.0k20.5k shares -9%

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, Q4 2023

#ManagerLocationShares Value% of their portfolioChangeShares change
1 ARK Investment Management LLC 0.08% of their portfolio ST. PETERSBURG, FL 6,671,5456.7m $14.0m $14.0m 0.08% Added +952.1k +952,118
2 BlackRock Inc. 0.00% of their portfolio New York, NY 3,315,2683.3m $7.0m $7.0m 0.00% Reduced -14.6k -14,610
3 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 2,070,0942.1m $4.3m $4.3m 0.00% Added +4.5k +4,493
4 Sumitomo Mitsui Trust Group, Inc. 0.00% of their portfolio CHIYODA-KU, TOKYO, M0 1,083,6851.1m $2.3m $2.3m 0.00% Unchanged
5 Amova Asset Management Americas, Inc. 0.02% of their portfolio New York, NY 1,083,6851.1m $2.3m $2.3m 0.02% Unchanged
6 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 840,811840.8k $1.8m $1.8m 0.00% Added +288.3k +288,336
7 ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio Boston, MA 520,182520.2k $1.1m $1.1m 0.00% Added +145.0k +145,045
8 Wellington Shields Capital Management, LLC 0.13% of their portfolio NEW YORK, NY 477,831477.8k $1.0m $1.0m 0.13% Reduced -179.9k -179,906
9 D. E. Shaw & Co., Inc. 0.00% of their portfolio New York, NY 465,242465.2k $977.0k $977.0k 0.00% Added +78.9k +78,901
10 STATE OF MICHIGAN RETIREMENT SYSTEM 0.01% of their portfolio EAST LANSING, MI 443,798443.8k $932.0k $932.0k 0.01% Unchanged
11 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 432,145432.1k $907.5k $907.5k 0.00% Added +309.8k +309,839
12 GSA CAPITAL PARTNERS LLP 0.07% of their portfolio LONDON, X0 395,643395.6k $831.0k $831.0k 0.07% Added +258.3k +258,285
13 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 389,709389.7k $818.6k $818.6k 0.00% Added +17.8k +17,811
14 JACOBS LEVY EQUITY MANAGEMENT, INC 0.00% of their portfolio FLORHAM PARK, NJ 335,835335.8k $705.3k $705.3k 0.00% Reduced -109.1k -109,068
15 Pacific Heights Asset Management LLC 0.06% of their portfolio San Francisco, CA 310,000310.0k $651.0k $651.0k 0.06% Unchanged
16 Bruce & Co., Inc. 0.22% of their portfolio CHICAGO, IL 300,000300.0k $630.0k $630.0k 0.22% Added +150.0k +150,000
17 Wellington Shields & Co., LLC 0.23% of their portfolio NEW YORK, NY 294,097294.1k $617.6k $617.6k 0.23% Reduced -310.2k -310,170
18 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 266,897266.9k $560.5k $560.5k 0.00% Added +152.0k +152,003
19 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 246,744246.7k $518.2k $518.2k 0.00% Added +139.5k +139,454
20 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 192,953193.0k $405.2k $405.2k 0.00% Reduced -1.2k -1,186
21 MARSHALL WACE, LLP 0.00% of their portfolio LONDON, X0 151,681151.7k $318.5k $318.5k 0.00% New
22 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 130,242130.2k $273.5k $273.5k 0.00% Unchanged
23 BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.01% of their portfolio HOUSTON, TX 129,500129.5k $271.9k $271.9k 0.01% Reduced -25.0k -25,000
24 XTX Topco Ltd 0.05% of their portfolio LONDON, X0 119,405119.4k $250.8k $250.8k 0.05% New
25 Green Alpha Advisors, LLC 0.18% of their portfolio NIWOT, CO 119,305119.3k $250.5k $250.5k 0.18% Reduced -7.9k -7,859
26 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 107,562107.6k $226.1k $226.1k 0.00% Reduced -109.8k -109,776
27 TWO SIGMA ADVISERS, LP 0.00% of their portfolio NEW YORK, NY 106,300106.3k $223.2k $223.2k 0.00% Reduced -17.3k -17,300
28 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 98,55998.6k $207.0k $207.0k 0.00% Added +12.0k +11,968
29 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 94,19194.2k $198.0k $198.0k 0.00% Added +18.3k +18,300
30 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 94,04494.0k $197.5k $197.5k 0.00% Added +49.2k +49,233
31 Quadrature Capital Ltd 0.00% of their portfolio LONDON, X0 73,00173.0k $152.2k $152.2k 0.00% New
32 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 60,10060.1k $127.0k $127.0k 0.00% Unchanged
33 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 59,51159.5k $125.0k $125.0k 0.00% Added +31.5k +31,538
34 Man Group plc 0.00% of their portfolio LONDON, X0 56,54056.5k $118.7k $118.7k 0.00% New
35 HSBC HOLDINGS PLC 0.00% of their portfolio LONDON, X0 45,46545.5k $92.7k $92.7k 0.00% Unchanged
36 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 45,02445.0k $94.6k $94.6k 0.00% Unchanged
37 Squarepoint Ops LLC 0.00% of their portfolio NEW YORK, NY 44,19844.2k $92.8k $92.8k 0.00% Added +31.9k +31,899
38 HOWLAND CAPITAL MANAGEMENT LLC 0.00% of their portfolio BOSTON, MA 42,84442.8k $90.0k $90.0k 0.00% Added +5.0k +5,000
39 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 39,40339.4k $82.7k $82.7k 0.00% New
40 Pathstone Holdings, LLC 0.00% of their portfolio ENGLEWOOD, NJ 36,39636.4k $76.4k $76.4k 0.00% First filing
41 PRUDENTIAL FINANCIAL INC 0.00% of their portfolio NEWARK, NJ 28,15028.1k $59.1k $59.1k 0.00% Unchanged
42 Prime Capital Investment Advisors, LLC 0.00% of their portfolio OVERLAND PARK, KS 27,76627.8k $58.3k $58.3k 0.00% Reduced -1.6k -1,643
43 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 22,94122.9k $48.2k $48.2k 0.00% Unchanged
44 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 22,23422.2k $46.7k $46.7k 0.00% Reduced -1.6k -1,620
45 Board of Trustees of The Leland Stanford Junior University 0.00% of their portfolio STANFORD, CA 22,10522.1k $46.4k $46.4k 0.00% Reduced -3.2k -3,157
46 IEQ CAPITAL, LLC 0.00% of their portfolio Foster City, CA 22,00022.0k $46.2k $46.2k 0.00% Unchanged
47 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 19,44019.4k $40.8k $40.8k 0.00% New
48 Parallel Advisors, LLC 0.00% of their portfolio SAN FRANCISCO, CA 16,52216.5k $34.7k $34.7k 0.00% Unchanged
49 HoyleCohen, LLC 0.00% of their portfolio SAN DIEGO, CA 15,37315.4k $32.3k $32.3k 0.00% Unchanged
50 Connor, Clark & Lunn Investment Management Ltd. 0.00% of their portfolio VANCOUVER, A1 15,07315.1k $31.7k $31.7k 0.00% New
51 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 13,54413.5k $28.4k $28.4k 0.00% Reduced -49 -49
52 Scientech Research LLC 0.02% of their portfolio JERSEY CITY, NJ 11,45511.5k $23.9k $23.9k 0.02% First filing
53 Cubist Systematic Strategies, LLC 0.00% of their portfolio STAMFORD, CT 11,09011.1k $23.3k $23.3k 0.00% New
54 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 10,73910.7k $22.0k $22.0k 0.00% Reduced -7.7k -7,702
55 Baader Bank Aktiengesellschaft 0.00% of their portfolio Unterschleissheim, 2M 10,70110.7k $16.7k $16.7k 0.00% New
56 UBS Group AG 0.00% of their portfolio ZURICH, V8 10,23010.2k $21.5k $21.5k 0.00% Reduced -10.4k -10,380
57 Banque Cantonale Vaudoise 0.00% of their portfolio LAUSANNE, V8 10,00010.0k $21.0k $21.0k 0.00% New
58 Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio ZURICH, V8 5,1905.2k $10.9k $10.9k 0.00% Reduced -423 -423
59 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 4,2064.2k $8.8k $8.8k 0.00% Reduced -2.5k -2,495
60 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 3,7093.7k $7.8k $7.8k 0.00% Unchanged
61 Qube Research & Technologies Ltd 0.00% of their portfolio LONDON, X0 3,1163.1k $6.5k $6.5k 0.00% Added +3.1k +3,107
62 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 1,7721.8k $3.7k $3.7k 0.00% Reduced -3.5m -3,534,345
63 SIMPLEX TRADING, LLC 0.00% of their portfolio CHICAGO, IL 513513 $1.0k $1.0k 0.00% New
64 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 302302 $634 $634 0.00% Added +19 +19
65 COMERICA BANK 0.00% of their portfolio DALLAS, TX 283283 $594 $594 0.00% Added +78 +78
66 PRINCIPAL SECURITIES, INC. 0.00% of their portfolio DES MOINES, IA 250250 $525 $525 0.00% First filing
67 FMR LLC 0.00% of their portfolio BOSTON, MA 220220 $462 $462 0.00% New
68 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 135135 $284 $284 0.00% Unchanged
69 GROUP ONE TRADING LLC 0.00% of their portfolio CHICAGO, IL 11 $2 $2 0.00% Unchanged
70 CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio BIRMINGHAM, AL 00 $0 $0 0.00% Unchanged