Vault-13

MERSANA THERAPEUTICS INC

COM · CUSIP 59045L106

123 institutional holders -3 vs Q1 2024
116,183,975116.2m shares reported held*
$233.5mreported value*
17 new 45 added 36 reduced 21 sold out net sold ≈ $17.5m (-8.7m 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. Implied quarter-end price ≈ $2.01. Options: 6 managers hold calls ($1.5m notional), 7 hold puts ($1.3m).

Trends to Q2 2024

Institutional holders

Managers reporting a position, each quarter

0100200Q3 22: 153Q4 22: 153Q1 23: 159Q2 23: 148Q3 23: 129Q4 23: 107Q1 24: 126Q2 24: 123123Q3 22Q1 23Q3 23Q1 24Q2 24
Numbers
QuarterHolders
Q3 2022153
Q4 2022153
Q1 2023159
Q2 2023148
Q3 2023129
Q4 2023107
Q1 2024126
Q2 2024123

Buyers vs sellers

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

Bought or addedCut or sold out
1000100Q4 22: 83 bought or addedQ4 22: 58 cut or sold outQ4 22Q1 23: 78 bought or addedQ1 23: 64 cut or sold outQ2 23: 89 bought or addedQ2 23: 85 cut or sold outQ2 23Q3 23: 60 bought or addedQ3 23: 88 cut or sold outQ4 23: 51 bought or addedQ4 23: 75 cut or sold outQ4 23Q1 24: 71 bought or addedQ1 24: 55 cut or sold outQ2 24: 62 bought or addedQ2 24: 57 cut or sold outQ2 24
Numbers
QuarterBought or addedCut or sold out
Q4 20228358
Q1 20237864
Q2 20238985
Q3 20236088
Q4 20235175
Q1 20247155
Q2 20246257

Calls vs puts

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

CallsPuts
$0$1m$2m$3mQ3 23 calls: $1.6mQ3 23 puts: $75.9kQ3 23P/C 0.05Q4 23 calls: $962.0kQ4 23 puts: $1.0mQ4 23P/C 1.04Q1 24 calls: $366.4kQ1 24 puts: $2.3mQ1 24P/C 6.41Q2 24 calls: $1.5mQ2 24 puts: $1.3mQ2 24P/C 0.84
Numbers
QuarterCallsPutsP/C
Q3 2023$1.6m$75.9k0.05
Q4 2023$962.0k$1.0m1.04
Q1 2024$366.4k$2.3m6.41
Q2 2024$1.5m$1.3m0.84

Biggest buyers

Nextech Invest Ltd. Added +5,669,825+5.7m
Schonfeld Strategic Advisors LLC Added +1,968,260+2.0m
JPMORGAN CHASE & CO Added +1,099,118+1.1m
GOLDMAN SACHS GROUP INC Added +572,330+572.3k
TWO SIGMA ADVISERS, LP Added +563,500+563.5k
TWO SIGMA INVESTMENTS, LP Added +530,745+530.7k
VANGUARD GROUP INC Added +428,151+428.2k
BlackRock Inc. Added +288,181+288.2k
HRT FINANCIAL LP New +259,689+259.7k
BNP PARIBAS FINANCIAL MARKETS Added +255,344+255.3k

Biggest sellers

MORGAN STANLEY Reduced -6,555,437-6.6m
Balyasny Asset Management L.P. Sold out -3,655,998-3.7m
STATE STREET CORP Reduced -2,815,388-2.8m
Woodline Partners LP Reduced -1,467,311-1.5m
MILLENNIUM MANAGEMENT LLC Reduced -815,795-815.8k
Ally Bridge Group (NY) LLC Sold out -801,437-801.4k
CITADEL ADVISORS LLC Reduced -715,386-715.4k
Deep Track Capital, LP Sold out -579,674-579.7k
Verition Fund Management LLC Reduced -553,114-553.1k
ACUTA CAPITAL PARTNERS, LLC Reduced -501,628-501.6k

Biggest calls

GROUP ONE TRADING LLC Added $616.9k306.9k shares
SIMPLEX TRADING, LLC Added $398.0k198.4k shares
SILVERARC CAPITAL MANAGEMENT, LLC Added $338.3k168.3k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Added $97.1k48.3k shares
CITADEL ADVISORS LLC Added $50.7k25.2k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

JANE STREET GROUP, LLC Reduced $770.2k383.2k shares
SIMPLEX TRADING, LLC Added $260.0k129.6k shares
GROUP ONE TRADING LLC Added $133.7k66.5k shares
CITADEL ADVISORS LLC Added $39.6k19.7k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced $31.0k15.4k shares
WOLVERINE TRADING, LLC New $22.7k11.3k 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
Nextech Crossover I GP S.a r.l. 13G · passive investor filed 2024-12-26 10.4% 12.1m 2024-12-26
VANGUARD GROUP INC 13G · institution filed 2025-04-30 6.7% 8.4m 2025-04-30

Fell to 5% or below in the last year: Schonfeld Strategic Advisors LLC (0.0%, 2026-02-17)

Holders, Q2 2024

#ManagerLocationShares Value% of their portfolioChangeShares change
1 EcoR1 Capital, LLC 1.19% of their portfolio San Francisco, CA 19,364,68819.4m $38.9m $38.9m 1.19% Unchanged
2 Venrock Adviser, LLC 1.45% of their portfolio NEW YORK, NY 11,328,00011.3m $22.8m $22.8m 1.45% Unchanged
3 Nextech Invest Ltd. 3.22% of their portfolio Zurich, V8 9,526,1469.5m $19.1m $19.1m 3.22% Added +5.7m +5,669,825
4 Bain Capital Life Sciences Investors, LLC 1.91% of their portfolio Boston, MA 8,663,6738.7m $17.4m $17.4m 1.91% Unchanged
5 BlackRock Inc. 0.00% of their portfolio New York, NY 8,383,9108.4m $16.9m $16.9m 0.00% Added +288.2k +288,181
6 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 6,702,5216.7m $13.5m $13.5m 0.00% Added +428.2k +428,151
7 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 3,953,7984.0m $7.9m $7.9m 0.00% Added +1.1m +1,099,118
8 Rock Springs Capital Management LP 0.18% of their portfolio Baltimore, MD 3,046,7823.0m $6.1m $6.1m 0.18% Unchanged
9 Schonfeld Strategic Advisors LLC 0.05% of their portfolio NEW YORK, NY 2,976,9183.0m $6.0m $6.0m 0.05% Added +2.0m +1,968,260
10 CITADEL ADVISORS LLC 0.01% of their portfolio MIAMI, FL 2,743,5992.7m $5.5m $5.5m 0.01% Reduced -715.4k -715,386
11 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 2,682,0552.7m $5.4m $5.4m 0.00% Reduced -2.8m -2,815,388
12 Cormorant Asset Management, LP 0.30% of their portfolio BOSTON, MA 2,600,0002.6m $5.2m $5.2m 0.30% Unchanged
13 SILVERARC CAPITAL MANAGEMENT, LLC 1.24% of their portfolio BOSTON, MA 2,500,5852.5m $5.0m $5.0m 1.24% Reduced -468.2k -468,213
14 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 2,493,4232.5m $5.0m $5.0m 0.00% Added +135.2k +135,202
15 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 2,272,5942.3m $4.6m $4.6m 0.00% Reduced -6.6m -6,555,437
16 ACUTA CAPITAL PARTNERS, LLC 2.82% of their portfolio REDWOOD CITY, CA 1,663,0001.7m $3.3m $3.3m 2.82% Reduced -501.6k -501,628
17 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 1,576,0001.6m $3.2m $3.2m 0.00% Reduced -9.3k -9,263
18 Woodline Partners LP 0.03% of their portfolio San Francisco, CA 1,467,3111.5m $2.9m $2.9m 0.03% Reduced -1.5m -1,467,311
19 D. E. Shaw & Co., Inc. 0.00% of their portfolio New York, NY 1,465,5801.5m $2.9m $2.9m 0.00% Added +243.0k +242,957
20 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 1,448,2191.4m $2.9m $2.9m 0.00% Added +20.4k +20,400
21 5AM Venture Management, LLC 0.59% of their portfolio SAN FRANCISCO, CA 1,305,0001.3m $2.6m $2.6m 0.59% Unchanged
22 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 1,244,9371.2m $2.5m $2.5m 0.00% Added +572.3k +572,330
23 BAKER BROS. ADVISORS LP 0.03% of their portfolio NEW YORK, NY 1,086,1151.1m $2.2m $2.2m 0.03% Unchanged
24 Qube Research & Technologies Ltd 0.00% of their portfolio LONDON, X0 992,565992.6k $2.0m $2.0m 0.00% Added +32.9k +32,870
25 Octagon Capital Advisors LP 0.33% of their portfolio NEW YORK, NY 992,000992.0k $2.0m $2.0m 0.33% Reduced -8.0k -8,000
26 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 900,621900.6k $1.8m $1.8m 0.00% Reduced -44.5k -44,550
27 Affinity Asset Advisors, LLC 0.24% of their portfolio NEW YORK, NY 767,000767.0k $1.5m $1.5m 0.24% Reduced -233.0k -233,000
28 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 748,690748.7k $1.5m $1.5m 0.00% Added +530.7k +530,745
29 TWO SIGMA ADVISERS, LP 0.00% of their portfolio NEW YORK, NY 719,300719.3k $1.4m $1.4m 0.00% Added +563.5k +563,500
30 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 691,785691.8k $1.4m $1.4m 0.00% Reduced -815.8k -815,795
31 OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) 0.03% of their portfolio CHICAGO, IL 544,293544.3k $1.1m $1.1m 0.03% Added +110.0k +110,000
32 WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio Boston, MA 532,866532.9k $1.1m $1.1m 0.00% Reduced -1.8k -1,752
33 ClariVest Asset Management LLC 0.10% of their portfolio SAN DIEGO, CA 500,498500.5k $1.0m $1.0m 0.10% Added +28.6k +28,650
34 JACOBS LEVY EQUITY MANAGEMENT, INC 0.00% of their portfolio FLORHAM PARK, NJ 485,593485.6k $976.0k $976.0k 0.00% Reduced -324.3k -324,286
35 BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.02% of their portfolio HOUSTON, TX 475,500475.5k $955.8k $955.8k 0.02% Added +243.2k +243,200
36 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 452,829452.8k $910.2k $910.2k 0.00% Added +74.1k +74,092
37 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 372,717372.7k $749.2k $749.2k 0.00% Reduced -36.5k -36,501
38 Atom Investors LP 0.07% of their portfolio AUSTIN, TX 365,435365.4k $734.5k $734.5k 0.07% Reduced -73.8k -73,797
39 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 336,079336.1k $675.5k $675.5k 0.00% Added +255.3k +255,344
40 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 317,332317.3k $637.8k $637.8k 0.00% Reduced -53.3k -53,301
41 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 312,630312.6k $628.4k $628.4k 0.00% Added +16.8k +16,758
42 SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.01% of their portfolio BALA CYNWYD, PA 308,691308.7k $620.5k $620.5k 0.01% Added +74.6k +74,575
43 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 259,689259.7k $521.0k $521.0k 0.00% New
44 Squarepoint Ops LLC 0.00% of their portfolio NEW YORK, NY 252,804252.8k $508.1k $508.1k 0.00% New
45 FMR LLC 0.00% of their portfolio BOSTON, MA 245,408245.4k $493.3k $493.3k 0.00% Reduced -80.2k -80,189
46 PANAGORA ASSET MANAGEMENT INC 0.00% of their portfolio BOSTON, MA 236,225236.2k $474.8k $474.8k 0.00% Added +183 +183
47 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 186,060186.1k $374.0k $374.0k 0.00% Added +17.2k +17,250
48 FEDERATED HERMES, INC. 0.00% of their portfolio PITTSBURGH, PA 185,507185.5k $372.9k $372.9k 0.00% Added +185.3k +185,331
49 Atle Fund Management AB 0.23% of their portfolio STOCKHOLM, V7 184,900184.9k $371.6k $371.6k 0.23% Added +84.9k +84,900
50 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 176,063176.1k $353.9k $353.9k 0.00% Reduced -2.9k -2,890
51 MARSHALL WACE, LLP 0.00% of their portfolio LONDON, X0 176,029176.0k $353.8k $353.8k 0.00% Added +137.6k +137,596
52 LOS ANGELES CAPITAL MANAGEMENT LLC 0.00% of their portfolio LOS ANGELES, CA 175,420175.4k $352.6k $352.6k 0.00% Reduced -21.7k -21,743
53 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 159,773159.8k $321.1k $321.1k 0.00% Reduced -49.8k -49,790
54 MACQUARIE GROUP LTD 0.00% of their portfolio Sydney, NSW 2000, C3 150,000150.0k $302.0k $302.0k 0.00% Unchanged
55 SG Americas Securities, LLC 0.00% of their portfolio NEW YORK, NY 138,722138.7k $279.0k $279.0k 0.00% Added +105.2k +105,209
56 Nuveen Asset Management, LLC 0.00% of their portfolio CHICAGO, IL 123,339123.3k $247.9k $247.9k 0.00% Unchanged
57 XTX Topco Ltd 0.02% of their portfolio LONDON, X0 121,432121.4k $244.1k $244.1k 0.02% Added +87.9k +87,893
58 SUPERSTRING CAPITAL MANAGEMENT LP 0.28% of their portfolio NEW YORK, NY 110,073110.1k $221.2k $221.2k 0.28% New
59 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 108,859108.9k $218.8k $218.8k 0.00% Added +13.4k +13,377
60 ExodusPoint Capital Management, LP 0.00% of their portfolio NEW YORK, NY 107,174107.2k $215.0k $215.0k 0.00% New
61 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 99,07899.1k $200.0k $200.0k 0.00% Added +19.1k +19,146
62 Susquehanna Portfolio Strategies, LLC 0.01% of their portfolio Bala Cynwyd, PA 93,87893.9k $188.7k $188.7k 0.01% Unchanged
63 STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio MADISON, WI 83,60083.6k $168.0k $168.0k 0.00% Reduced -22.9k -22,900
64 Jump Financial, LLC 0.00% of their portfolio Chicago, IL 80,56280.6k $161.9k $161.9k 0.00% Added +64.3k +64,301
65 ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio Boston, MA 71,50671.5k $143.0k $143.0k 0.00% Reduced -397.4k -397,417
66 MetLife Investment Management, LLC 0.00% of their portfolio Whippany, NJ 65,58365.6k $131.8k $131.8k 0.00% Added +15.7k +15,684
67 QVT Financial LP 0.01% of their portfolio New York, NY 62,65762.7k $125.9k $125.9k 0.01% Unchanged
68 Corebridge Financial, Inc. 0.00% of their portfolio HOUSTON, TX 61,03061.0k $122.7k $122.7k 0.00% First filing
69 GSA CAPITAL PARTNERS LLP 0.01% of their portfolio LONDON, X0 57,96058.0k $116.0k $116.0k 0.01% Added +22.7k +22,705
70 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio CAUSEWAY BAY, K3 56,94556.9k $114.5k $114.5k 0.00% First filing
71 Graham Capital Management, L.P. 0.00% of their portfolio ROWAYTON, CT 50,97051.0k $102.5k $102.5k 0.00% New
72 Aigen Investment Management, LP 0.02% of their portfolio NEW YORK, NY 50,08350.1k $100.7k $100.7k 0.02% Added +25.6k +25,553
73 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 47,27047.3k $95.0k $95.0k 0.00% Added +9.6k +9,645
74 Y-Intercept (Hong Kong) Ltd 0.01% of their portfolio HONG KONG, K3 46,77946.8k $94.0k $94.0k 0.01% New
75 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio Toronto, A6 46,48746.5k $93.4k $93.4k 0.00% Added +4.4k +4,370
76 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 45,54745.5k $91.5k $91.5k 0.00% Added +27.6k +27,637
77 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 45,05645.1k $90.6k $90.6k 0.00% Reduced -279.4k -279,354
78 ALGERT GLOBAL LLC 0.00% of their portfolio SAN FRANCISCO, CA 44,65544.7k $89.8k $89.8k 0.00% New
79 EXCHANGE TRADED CONCEPTS, LLC 0.00% of their portfolio Oklahoma City, OK 43,42043.4k $87.3k $87.3k 0.00% Reduced -13.5k -13,510
80 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 40,76040.8k $81.9k $81.9k 0.00% Added +39.9k +39,940
81 SIMPLEX TRADING, LLC 0.00% of their portfolio CHICAGO, IL 38,66138.7k $77.0k $77.0k 0.00% Added +30.6k +30,621
82 VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio ATLANTA, GA 38,58838.6k $77.6k $77.6k 0.00% Added +2.1k +2,061
83 NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio ALBANY, NY 37,23537.2k $74.8k $74.8k 0.00% Added +80 +80
84 UBS Group AG 0.00% of their portfolio ZURICH, V8 34,98335.0k $70.3k $70.3k 0.00% Reduced -254.7k -254,684
85 Walleye Trading LLC 0.00% of their portfolio NEW YORK, NY 31,52631.5k $63.4k $63.4k 0.00% Unchanged
86 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.00% of their portfolio TALLAHASSEE, FL 28,80028.8k $57.9k $57.9k 0.00% Added +1.4k +1,398
87 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 25,56625.6k $51.4k $51.4k 0.00% Reduced -389.3k -389,282
88 PRIO WEALTH LIMITED PARTNERSHIP 0.00% of their portfolio Boston, MA 23,52923.5k $47.3k $47.3k 0.00% Unchanged
89 GROUP ONE TRADING LLC 0.00% of their portfolio CHICAGO, IL 23,47023.5k $47.2k $47.2k 0.00% New
90 Jasper Ridge Partners, L.P. 0.00% of their portfolio MENLO PARK, CA 23,10023.1k $46.4k $46.4k 0.00% Unchanged
91 PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.00% of their portfolio COLUMBUS, OH 20,58720.6k $41.4k $41.4k 0.00% New
92 AJOVista, LLC 0.12% of their portfolio BOSTON, MA 20,46320.5k $41.1k $41.1k 0.12% New
93 PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio DES MOINES, IA 18,27818.3k $36.7k $36.7k 0.00% Reduced -13.5k -13,497
94 NISA INVESTMENT ADVISORS, LLC 0.00% of their portfolio ST. LOUIS, MO 17,80017.8k $35.8k $35.8k 0.00% Added +64 +64
95 PRUDENTIAL FINANCIAL INC 0.00% of their portfolio NEWARK, NJ 17,33517.3k $34.8k $34.8k 0.00% Unchanged
96 GRIMES & Co WEALTH MANAGEMENT, LLC 0.00% of their portfolio WESTBOROUGH, MA 14,99815.0k $30.1k $30.1k 0.00% Reduced -349 -349
97 ProShare Advisors LLC 0.00% of their portfolio BETHESDA, MD 14,85014.8k $29.8k $29.8k 0.00% Reduced -5.1k -5,069
98 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 13,70313.7k $27.5k $27.5k 0.00% Reduced -17.5k -17,540
99 HSBC HOLDINGS PLC 0.00% of their portfolio LONDON, X0 12,52612.5k $24.9k $24.9k 0.00% Reduced -82 -82
100 VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio San Antonio, TX 11,87311.9k $23.9k $23.9k 0.00% Reduced -214 -214