Vault-13

PERSONALIS INC PSNL

COM · Common Stock · CUSIP 71535D106

Company in Menlo Park, United States

64 institutional holders -17 vs Q4 2022
27,101,74727.1m shares reported held*
57.9% of all shares outstanding*
$75.0mreported value*
6 new 27 added 18 reduced 22 sold out net sold ≈ $805.2k (-396.9k 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: 46.8m as of 2023-04-27, 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 ≈ $2.77. Options: 3 managers hold calls ($167.5k notional), 2 hold puts ($24.8k).

Trends to Q1 2023

Institutional holders

Managers reporting a position, each quarter

050100Q3 22: 81Q4 22: 81Q1 23: 6464Q3 22Q4 22Q1 23
Numbers
QuarterHolders
Q3 202281
Q4 202281
Q1 202364

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 23
Numbers
QuarterBought or addedCut or sold out
Q4 20224142
Q1 20233340

Calls vs puts

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

CallsPuts
$0$50k$100k$150k$200kQ3 22 calls: $136.0kQ3 22 puts: $63.0kQ3 22P/C 0.46Q4 22 calls: $2.4kQ4 22 puts: $35.5kQ4 22P/C 14.94Q1 23 calls: $167.5kQ1 23 puts: $24.8kQ1 23P/C 0.15
Numbers
QuarterCallsPutsP/C
Q3 2022$136.0k$63.0k0.46
Q4 2022$2.4k$35.5k14.94
Q1 2023$167.5k$24.8k0.15

Biggest buyers

Balyasny Asset Management L.P. New +1,004,610+1.0m
ARK Investment Management LLC Added +279,964+280.0k
Amova Asset Management Americas, Inc. Added +128,843+128.8k
Sumitomo Mitsui Trust Group, Inc. Added +128,843+128.8k
JPMORGAN CHASE & CO Added +124,482+124.5k
ACADIAN ASSET MANAGEMENT LLC Added +108,360+108.4k
Man Group plc New +105,184+105.2k
Bruce & Co., Inc. Added +100,000+100.0k
JACOBS LEVY EQUITY MANAGEMENT, INC Added +89,895+89.9k
Alyeska Investment Group, L.P. Added +83,996+84.0k

Biggest sellers

MILLENNIUM MANAGEMENT LLC Reduced -708,178-708.2k
D. E. Shaw & Co., Inc. Reduced -328,262-328.3k
MARSHALL WACE, LLP Sold out -221,823-221.8k
RENAISSANCE TECHNOLOGIES LLC Reduced -195,711-195.7k
GSA CAPITAL PARTNERS LLP Sold out -156,574-156.6k
BlackRock Inc. Reduced -148,098-148.1k
BANK OF MONTREAL /CAN/ Sold out -139,800-139.8k
Man Group plc Sold out -138,214-138.2k
272 Capital LP Sold out -125,670-125.7k
TUDOR INVESTMENT CORP ET AL Sold out -114,512-114.5k

Biggest calls

CITADEL ADVISORS LLC New $167.5k60.7k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares
SIMPLEX TRADING, LLC New $0100 shares

Biggest puts

CITADEL ADVISORS LLC Reduced $24.8k9.0k 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)

Insider purchases and sales in Q1 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
404Q2 21: 0 buyingQ2 21: 0 sellingQ3 21: 0 buyingQ3 21: 0 sellingQ3 21Q4 21: 0 buyingQ4 21: 3 sellingQ1 22: 0 buyingQ1 22: 3 sellingQ1 22Q2 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 23
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q2 20210—0——
Q3 20210—0——
Q4 20210—3$4.8m—
Q1 20220—3——
Q2 20220—4$113.9k—
Q3 20220—2$35.3k—
Q4 20220—3$58.5k—
Q1 20230—2$17.8k—
DateInsiderTradeSharesPrice ValueTheir holding
2023-03-17 Tachibana Aaron CFO and COO Sold 3,945 $2.83 $11.2k3.9k shares -2%
2023-03-17 Chen Richard Chief Medical Officer and EVP Sold 1,314 $2.83 $3.7k1.3k shares -1%
2023-01-31 Tachibana Aaron Chief Financial Officer Sold 767 $2.20 $1.7k767 shares -<1%
2023-01-31 Chen Richard Chief Medical Officer Sold 562 $2.20 $1.2k562 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 2023

#ManagerLocationShares Value% of their portfolioChangeShares change
1 ARK Investment Management LLC 0.11% of their portfolio ST. PETERSBURG, FL 5,780,3645.8m $16.0m $16.0m 0.11% Added +280.0k +279,964
2 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 3,627,7213.6m $10.0m $10.0m 0.00% Added +124.5k +124,482
3 BlackRock Inc. 0.00% of their portfolio New York, NY 3,410,8153.4m $9.4m $9.4m 0.00% Reduced -148.1k -148,098
4 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 2,065,6012.1m $5.7m $5.7m 0.00% Added +30.6k +30,601
5 Alyeska Investment Group, L.P. 0.03% of their portfolio CHICAGO, IL 1,245,6681.2m $3.4m $3.4m 0.03% Added +84.0k +83,996
6 Sumitomo Mitsui Trust Group, Inc. 0.00% of their portfolio CHIYODA-KU, TOKYO, M0 1,018,7131.0m $2.8m $2.8m 0.00% Added +128.8k +128,843
7 Amova Asset Management Americas, Inc. 0.03% of their portfolio New York, NY 1,018,7131.0m $2.8m $2.8m 0.03% Added +128.8k +128,843
8 Wellington Shields & Co., LLC 0.63% of their portfolio NEW YORK, NY 1,013,3131.0m $2.8m $2.8m 0.63% Unchanged
9 Balyasny Asset Management L.P. 0.01% of their portfolio Chicago, IL 1,004,6101.0m $2.8m $2.8m 0.01% New
10 Wellington Shields Capital Management, LLC 0.29% of their portfolio NEW YORK, NY 882,938882.9k $2.4m $2.4m 0.29% Added +19.8k +19,800
11 ACADIAN ASSET MANAGEMENT LLC 0.01% of their portfolio Boston, MA 647,224647.2k $1.8m $1.8m 0.01% Added +108.4k +108,360
12 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 447,200447.2k $1.2m $1.2m 0.00% Reduced -195.7k -195,711
13 STATE OF MICHIGAN RETIREMENT SYSTEM 0.01% of their portfolio EAST LANSING, MI 443,798443.8k $1.2m $1.2m 0.01% Unchanged
14 D. E. Shaw & Co., Inc. 0.00% of their portfolio New York, NY 406,891406.9k $1.1m $1.1m 0.00% Reduced -328.3k -328,262
15 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 386,501386.5k $1.1m $1.1m 0.00% Added +18.2k +18,156
16 Pacific Heights Asset Management LLC 0.08% of their portfolio San Francisco, CA 310,000310.0k $855.6k $855.6k 0.08% Unchanged
17 JACOBS LEVY EQUITY MANAGEMENT, INC 0.00% of their portfolio FLORHAM PARK, NJ 291,120291.1k $803.5k $803.5k 0.00% Added +89.9k +89,895
18 UBS Group AG 0.00% of their portfolio ZURICH, V8 264,080264.1k $728.9k $728.9k 0.00% Added +2.8k +2,820
19 TWO SIGMA ADVISERS, LP 0.00% of their portfolio NEW YORK, NY 223,400223.4k $616.6k $616.6k 0.00% Reduced -67.1k -67,100
20 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 218,831218.8k $604.0k $604.0k 0.00% Reduced -17.3k -17,329
21 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 214,141214.1k $590.7k $590.7k 0.00% Added +54.8k +54,750
22 FRED ALGER MANAGEMENT, LLC 0.00% of their portfolio NEW YORK, NY 209,152209.2k $577.3k $577.3k 0.00% Added +52 +52
23 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 183,392183.4k $506.2k $506.2k 0.00% Added +45.5k +45,542
24 Bruce & Co., Inc. 0.11% of their portfolio CHICAGO, IL 150,000150.0k $414.0k $414.0k 0.11% Added +100.0k +100,000
25 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 149,469149.5k $413.0k $413.0k 0.00% Reduced -708.2k -708,178
26 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 142,810142.8k $394.2k $394.2k 0.00% Added +15.0k +15,045
27 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 130,242130.2k $359.5k $359.5k 0.00% Added +12.1k +12,100
28 BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.01% of their portfolio HOUSTON, TX 115,500115.5k $318.8k $318.8k 0.01% Unchanged
29 Man Group plc 0.00% of their portfolio LONDON, X0 105,184105.2k $290.3k $290.3k 0.00% New
30 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 97,47997.5k $269.0k $269.0k 0.00% Added +53.2k +53,201
31 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 90,49490.5k $249.8k $249.8k 0.00% Added +65.4k +65,442
32 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 87,66987.7k $242.0k $242.0k 0.00% Added +3.5k +3,469
33 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 75,89175.9k $209.0k $209.0k 0.00% Reduced -1.7k -1,717
34 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 75,57975.6k $208.6k $208.6k 0.00% Reduced -13.6k -13,647
35 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 75,53375.5k $208.5k $208.5k 0.00% Added +30.5k +30,509
36 Green Alpha Advisors, LLC 0.14% of their portfolio NIWOT, CO 70,52670.5k $194.7k $194.7k 0.14% Added +3.9k +3,910
37 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 60,10060.1k $166.0k $166.0k 0.00% Reduced -28.8k -28,800
38 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 58,60058.6k $161.7k $161.7k 0.00% Added +7.6k +7,635
39 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 56,86056.9k $156.9k $156.9k 0.00% Reduced -8.6k -8,568
40 HSBC HOLDINGS PLC 0.00% of their portfolio LONDON, X0 53,24053.2k $152.8k $152.8k 0.00% Unchanged
41 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 43,88843.9k $121.1k $121.1k 0.00% Reduced -4.2k -4,237
42 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 28,42128.4k $78.4k $78.4k 0.00% Added +13.4k +13,422
43 FMR LLC 0.00% of their portfolio BOSTON, MA 26,87426.9k $74.2k $74.2k 0.00% Added +18.0k +17,960
44 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 24,18824.2k $66.8k $66.8k 0.00% Reduced -682 -682
45 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 22,94122.9k $63.3k $63.3k 0.00% Unchanged
46 IEQ CAPITAL, LLC 0.00% of their portfolio Foster City, CA 22,00022.0k $60.7k $60.7k 0.00% Unchanged
47 HOWLAND CAPITAL MANAGEMENT LLC 0.00% of their portfolio BOSTON, MA 20,20020.2k $55.8k $55.8k 0.00% Unchanged
48 Parallel Advisors, LLC 0.00% of their portfolio SAN FRANCISCO, CA 16,52216.5k $45.6k $45.6k 0.00% Unchanged
49 PATHSTONE FAMILY OFFICE, LLC 0.00% of their portfolio ENGLEWOOD, NJ 15,76815.8k $43.5k $43.5k 0.00% Reduced -18.9k -18,850
50 HoyleCohen, LLC 0.00% of their portfolio SAN DIEGO, CA 15,37315.4k $42.4k $42.4k 0.00% Unchanged
51 Engineers Gate Manager LP 0.00% of their portfolio NEW YORK, NY 12,94212.9k $35.7k $35.7k 0.00% Reduced -2.2k -2,219
52 Board of Trustees of The Leland Stanford Junior University 0.00% of their portfolio STANFORD, CA 12,63112.6k $34.9k $34.9k 0.00% Reduced -12.6k -12,631
53 BSW Wealth Partners 0.01% of their portfolio BOULDER, CO 10,00910.0k $27.6k $27.6k 0.01% New
54 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 9,97710.0k $28.0k $28.0k 0.00% Reduced -6.8k -6,823
55 Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio ZURICH, V8 6,5826.6k $18.2k $18.2k 0.00% Unchanged
56 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 5,9536.0k $16.4k $16.4k 0.00% Added +2.5k +2,496
57 WR Wealth Planners, LLC 0.00% of their portfolio COLUMBIA, MO 1,7001.7k $4.7k $4.7k 0.00% New
58 SIMPLEX TRADING, LLC 0.00% of their portfolio CHICAGO, IL 1,0511.1k $2.0k $2.0k 0.00% Reduced -1.3k -1,289
59 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 261261 $720 $720 0.00% Added +4 +4
60 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 132132 $364 $364 0.00% Reduced -438 -438
61 IFP Advisors, Inc 0.00% of their portfolio TAMPA, FL 124124 $3.5k $3.5k 0.00% Unchanged
62 Bogart Wealth, LLC 0.00% of their portfolio MCLEAN, VA 3131 $86 $86 0.00% New
63 GROUP ONE TRADING LLC 0.00% of their portfolio CHICAGO, IL 11 $3 $3 0.00% New
64 CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio BIRMINGHAM, AL 00 $0 $0 0.00% Unchanged