Vault-13

MERUS N V MRUS

COM · Common Stock · CUSIP N5749R100

115 institutional holders +10 vs Q1 2023
41,244,20841.2m shares reported held*
$1.1bnreported value*
25 new 34 added 33 reduced 15 sold out net bought ≈ $110.6m (+4.2m 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 ($1.4m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $26.33. Options: 5 managers hold calls ($1.9m notional), 5 hold puts ($2.0m).

Trends to Q2 2023

Institutional holders

Managers reporting a position, each quarter

050100150Q3 22: 101Q4 22: 92Q1 23: 105Q2 23: 115115Q3 22Q4 22Q1 23Q2 23
Numbers
QuarterHolders
Q3 2022101
Q4 202292
Q1 2023105
Q2 2023115

Buyers vs sellers

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

Bought or addedCut or sold out
1000100Q4 22: 45 bought or addedQ4 22: 54 cut or sold outQ4 22Q1 23: 55 bought or addedQ1 23: 30 cut or sold outQ1 23Q2 23: 59 bought or addedQ2 23: 48 cut or sold outQ2 23
Numbers
QuarterBought or addedCut or sold out
Q4 20224554
Q1 20235530
Q2 20235948

Calls vs puts

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

CallsPuts
$0$2m$4m$6mQ3 22 calls: $136.0kQ3 22 puts: $318.0kQ3 22P/C 2.34Q4 22 calls: $626.1kQ4 22 puts: $51.1kQ4 22P/C 0.08Q1 23 calls: $4.6mQ1 23 puts: $322.0kQ1 23P/C 0.07Q2 23 calls: $1.9mQ2 23 puts: $2.0mQ2 23P/C 1.05
Numbers
QuarterCallsPutsP/C
Q3 2022$136.0k$318.0k2.34
Q4 2022$626.1k$51.1k0.08
Q1 2023$4.6m$322.0k0.07
Q2 2023$1.9m$2.0m1.05

Biggest buyers

SAMLYN CAPITAL, LLC Added +1,224,022+1.2m
Fairmount Funds Management LLC Added +1,107,970+1.1m
RTW INVESTMENTS, LP New +1,050,893+1.1m
Commodore Capital LP Added +1,050,000+1.1m
DEERFIELD MANAGEMENT COMPANY, L.P. Added +651,500+651.5k
BlackRock Inc. Added +584,094+584.1k
Venrock Adviser, LLC Added +500,000+500.0k
Rock Springs Capital Management LP New +478,531+478.5k
Point72 Asset Management, L.P. Added +414,737+414.7k
MORGAN STANLEY Added +274,045+274.0k

Biggest sellers

BVF INC/IL Reduced -1,376,000-1.4m
FMR LLC Reduced -551,356-551.4k
WELLINGTON MANAGEMENT GROUP LLP Reduced -462,133-462.1k
Aquilo Capital Management, LLC Reduced -450,000-450.0k
Vivo Capital, LLC Sold out -353,600-353.6k
Ikarian Capital, LLC Reduced -145,525-145.5k
Artisan Partners Limited Partnership Sold out -139,734-139.7k
CAAS CAPITAL MANAGEMENT LP Sold out -100,887-100.9k
PLATINUM INVESTMENT MANAGEMENT LTD Reduced -88,814-88.8k
STATE STREET CORP Reduced -82,692-82.7k

Biggest calls

SUSQUEHANNA INTERNATIONAL GROUP, LLP Added $679.3k25.8k shares
GROUP ONE TRADING LLC New $634.6k24.1k shares
CITADEL ADVISORS LLC Added $513.4k19.5k shares
SIMPLEX TRADING, LLC Reduced $73.0k2.8k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

UBS Group AG New $1.2m44.6k shares
CITADEL ADVISORS LLC Reduced $423.9k16.1k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP New $231.7k8.8k shares
GROUP ONE TRADING LLC New $173.8k6.6k 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.

No one currently above 5% in the filings since 19 Dec 2024.

Fell to 5% or below in the last year: Paradigm Biocapital Advisors LP (0.0%, 2026-02-17), GENMAB A/S (0.0%, 2025-12-30), RTW INVESTMENTS, LP (2.7%, 2025-11-14)

Holders, Q2 2023

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Commodore Capital LP 11.84% of their portfolio NEW YORK, NY 4,000,0004.0m $105.3m $105.3m 11.84% Added +1.1m +1,050,000
2 DEERFIELD MANAGEMENT COMPANY, L.P. 1.70% of their portfolio New York, NY 3,031,9383.0m $79.8m $79.8m 1.70% Added +651.5k +651,500
3 SAMLYN CAPITAL, LLC 1.30% of their portfolio New York, NY 2,837,4492.8m $74.7m $74.7m 1.30% Added +1.2m +1,224,022
4 WELLINGTON MANAGEMENT GROUP LLP 0.01% of their portfolio Boston, MA 2,675,1122.7m $70.4m $70.4m 0.01% Reduced -462.1k -462,133
5 FEDERATED HERMES, INC. 0.17% of their portfolio PITTSBURGH, PA 2,638,7002.6m $69.5m $69.5m 0.17% Unchanged
6 Boxer Capital, LLC 2.32% of their portfolio San Diego, CA 1,900,0001.9m $50.0m $50.0m 2.32% Unchanged
7 Venrock Adviser, LLC 7.27% of their portfolio NEW YORK, NY 1,726,2141.7m $45.5m $45.5m 7.27% Added +500.0k +500,000
8 BVF INC/IL 1.18% of their portfolio San Francisco, CA 1,602,4201.6m $42.2m $42.2m 1.18% Reduced -1.4m -1,376,000
9 Medicxi Ventures Management (Jersey) Ltd 11.80% of their portfolio ST. HELIER, Y9 1,600,0001.6m $42.1m $42.1m 11.80% Unchanged
10 FRANKLIN RESOURCES INC 0.02% of their portfolio San Mateo, CA 1,592,2581.6m $41.9m $41.9m 0.02% Added +1.2k +1,193
11 BRAIDWELL LP 1.33% of their portfolio STAMFORD, CT 1,543,1621.5m $40.6m $40.6m 1.33% Added +70.1k +70,078
12 Fairmount Funds Management LLC 5.50% of their portfolio WEST CONSHOHOCKEN, PA 1,482,4051.5m $39.0m $39.0m 5.50% Added +1.1m +1,107,970
13 BlackRock Inc. 0.00% of their portfolio New York, NY 1,185,8201.2m $31.2m $31.2m 0.00% Added +584.1k +584,094
14 Lynx1 Capital Management LP 19.88% of their portfolio DORADO, PR 1,152,5251.2m $30.3m $30.3m 19.88% Added +84.8k +84,802
15 Driehaus Capital Management LLC 0.38% of their portfolio Chicago, IL 1,136,7161.1m $29.9m $29.9m 0.38% Added +32.2k +32,181
16 RTW INVESTMENTS, LP 0.53% of their portfolio NEW YORK, NY 1,050,8931.1m $27.7m $27.7m 0.53% New
17 Aquilo Capital Management, LLC 13.39% of their portfolio SAN FRANCISCO, CA 775,109775.1k $20.4m $20.4m 13.39% Reduced -450.0k -450,000
18 Polar Capital Holdings Plc 0.14% of their portfolio London, X0 750,000750.0k $19.7m $19.7m 0.14% Unchanged
19 Frazier Life Sciences Management, L.P. 1.17% of their portfolio PALO ALTO, CA 746,479746.5k $19.7m $19.7m 1.17% Unchanged
20 Point72 Asset Management, L.P. 0.06% of their portfolio STAMFORD, CT 609,197609.2k $16.0m $16.0m 0.06% Added +414.7k +414,737
21 FMR LLC 0.00% of their portfolio BOSTON, MA 594,556594.6k $15.7m $15.7m 0.00% Reduced -551.4k -551,356
22 SILVERARC CAPITAL MANAGEMENT, LLC 5.24% of their portfolio BOSTON, MA 589,255589.3k $15.5m $15.5m 5.24% Reduced -79.5k -79,529
23 Rock Springs Capital Management LP 0.30% of their portfolio Baltimore, MD 478,531478.5k $12.6m $12.6m 0.30% New
24 Carmignac Gestion 0.19% of their portfolio PARIS, I0 414,323414.3k $10.9m $10.9m 0.19% Reduced -60.3k -60,329
25 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 395,789395.8k $10.4m $10.4m 0.00% Added +274.0k +274,045
26 DAFNA Capital Management LLC 2.77% of their portfolio LOS ANGELES, CA 384,870384.9k $10.1m $10.1m 2.77% Added +100.9k +100,872
27 TCG Crossover Management, LLC 1.30% of their portfolio PALO ALTO, CA 300,000300.0k $7.9m $7.9m 1.30% Unchanged
28 SPHERA FUNDS MANAGEMENT LTD. 1.57% of their portfolio TEL AVIV, L3 278,333278.3k $7.3m $7.3m 1.57% Reduced -58.7k -58,660
29 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 206,369206.4k $5.4m $5.4m 0.00% Reduced -82.7k -82,692
30 Ally Bridge Group (NY) LLC 6.35% of their portfolio NEW YORK, NY 199,221199.2k $5.2m $5.2m 6.35% Reduced -76.7k -76,749
31 TWO SIGMA ADVISERS, LP 0.01% of their portfolio NEW YORK, NY 198,000198.0k $5.2m $5.2m 0.01% Added +34.7k +34,700
32 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 197,510197.5k $5.2m $5.2m 0.00% Added +142.2k +142,203
33 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 179,996180.0k $4.7m $4.7m 0.00% Reduced -35.0k -34,952
34 Schonfeld Strategic Advisors LLC 0.04% of their portfolio NEW YORK, NY 162,501162.5k $4.3m $4.3m 0.04% Added +93.3k +93,342
35 Nan Fung Group Holdings Ltd 2.54% of their portfolio KAI TAK, K3 151,000151.0k $4.0m $4.0m 2.54% Unchanged
36 PLATINUM INVESTMENT MANAGEMENT LTD 0.14% of their portfolio SYDNEY AUSTRALIA 2000, C3 150,238150.2k $4.0m $4.0m 0.14% Reduced -88.8k -88,814
37 OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) 0.08% of their portfolio CHICAGO, IL 147,106147.1k $3.9m $3.9m 0.08% Added +32.0k +32,026
38 Eversept Partners, LP 0.36% of their portfolio NEW YORK, NY 131,226131.2k $3.5m $3.5m 0.36% Added +2.2k +2,170
39 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 123,007123.0k $3.2m $3.2m 0.00% Added +1.3k +1,281
40 TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio NEW YORK, NY 112,545112.5k $3.0m $3.0m 0.01% Added +59.2k +59,176
41 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 112,317112.3k $3.0m $3.0m 0.00% Reduced -2.9k -2,880
42 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 110,159110.2k $2.9m $2.9m 0.00% New
43 Tri Locum Partners LP 1.00% of their portfolio NEW YORK, NY 101,691101.7k $2.7m $2.7m 1.00% New
44 ALGERT GLOBAL LLC 0.11% of their portfolio SAN FRANCISCO, CA 99,70299.7k $2.6m $2.6m 0.11% Reduced -12.2k -12,156
45 VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio ATLANTA, GA 93,97594.0k $2.5m $2.5m 0.00% New
46 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 86,28486.3k $2.3m $2.3m 0.00% Reduced -59.2k -59,175
47 Hudson Bay Capital Management LP 0.02% of their portfolio STAMFORD, CT 81,30681.3k $2.1m $2.1m 0.02% New
48 Parkman Healthcare Partners LLC 0.31% of their portfolio STAMFORD, CT 67,88167.9k $1.8m $1.8m 0.31% New
49 Swiss National Bank 0.00% of their portfolio ZURICH, V8 64,95465.0k $1.7m $1.7m 0.00% Unchanged
50 Ikarian Capital, LLC 0.56% of their portfolio DALLAS, TX 63,12563.1k $1.7m $1.7m 0.56% Reduced -145.5k -145,525
51 NORGES BANK 0.00% of their portfolio OSLO, Q8 60,30060.3k $1.6m $1.6m 0.00% Unchanged
52 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 53,14353.1k $1.4m $1.4m 0.00% New
53 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 51,01151.0k $1.3m $1.3m 0.00% Reduced -671 -671
54 Bellevue Group AG 0.02% of their portfolio ZURICH, V8 44,50044.5k $1.2m $1.2m 0.02% Reduced -1.2k -1,200
55 CREDIT SUISSE AG/ 0.00% of their portfolio ZURICH, V8 38,73138.7k $1.0m $1.0m 0.00% Added +3.1k +3,073
56 BIT Capital GmbH 0.12% of their portfolio BERLIN, 2M 38,63038.6k $1.0m $1.0m 0.12% Added +2.7k +2,741
57 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 34,36434.4k $904.8k $904.8k 0.00% Added +23.1k +23,110
58 HighVista Strategies LLC 0.41% of their portfolio BOSTON, MA 34,02734.0k $895.9k $895.9k 0.41% Reduced -11.9k -11,930
59 Cubist Systematic Strategies, LLC 0.01% of their portfolio STAMFORD, CT 33,36533.4k $878.5k $878.5k 0.01% Added +19.5k +19,529
60 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 31,37131.4k $826.0k $826.0k 0.00% Added +6.6k +6,601
61 MARSHALL WACE, LLP 0.00% of their portfolio LONDON, X0 31,10031.1k $818.9k $818.9k 0.00% Unchanged
62 Alpha DNA Investment Management LLC 0.43% of their portfolio Columbia, MD 28,81728.8k $758.8k $758.8k 0.43% New
63 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 28,11828.1k $740.3k $740.3k 0.00% Added +27.4k +27,383
64 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio WEST SACRAMENTO, CA 26,48626.5k $697.4k $697.4k 0.00% Added +46 +46
65 STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio MADISON, WI 26,39426.4k $695.0k $695.0k 0.00% Reduced -1.4k -1,416
66 DekaBank Deutsche Girozentrale 0.00% of their portfolio FRANKFURT, 2M 25,00025.0k $666.0k $666.0k 0.00% Unchanged
67 SANDERS MORRIS HARRIS LLC 0.15% of their portfolio Houston, TX 24,87024.9k $658.6k $658.6k 0.15% New
68 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 24,31224.3k $640.1k $640.1k 0.00% Added +7.6k +7,611
69 TUDOR INVESTMENT CORP ET AL 0.01% of their portfolio STAMFORD, CT 22,92222.9k $603.5k $603.5k 0.01% Added +5.3k +5,307
70 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 22,49822.5k $592.4k $592.4k 0.00% Reduced -3.1k -3,147
71 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio NEW YORK, NY 21,92821.9k $403.5k $403.5k 0.00% Unchanged
72 Legal & General Group Plc 0.00% of their portfolio London, X0 21,41421.4k $563.8k $563.8k 0.00% Added +12.9k +12,898
73 AE Wealth Management LLC 0.00% of their portfolio TOPEKA, KS 19,69919.7k $518.7k $518.7k 0.00% New
74 Mach-1 Financial Group, LLC 0.21% of their portfolio Rogers, AR 19,69919.7k $518.7k $518.7k 0.21% New
75 Allianz Asset Management GmbH 0.00% of their portfolio MUNICH, 2M 18,06318.1k $450.0k $450.0k 0.00% New
76 AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio KANSAS CITY, MO 17,07917.1k $449.7k $449.7k 0.00% New
77 Weiss Multi-Strategy Advisers LLC 0.01% of their portfolio NEW YORK, NY 16,90316.9k $445.0k $445.0k 0.01% Added +2.2k +2,161
78 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 16,76416.8k $441.4k $441.4k 0.00% Reduced -7.2k -7,226
79 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 14,02114.0k $369.0k $369.0k 0.00% New
80 INNOVIS ASSET MANAGEMENT LLC 0.13% of their portfolio Chicago, IL 13,29913.3k $350.2k $350.2k 0.13% New
81 Mitsubishi UFJ Asset Management Co., Ltd. 0.00% of their portfolio TOKYO, M0 12,13612.1k $319.5k $319.5k 0.00% Reduced -4.4k -4,378
82 JANUS HENDERSON GROUP PLC 0.00% of their portfolio LONDON, X0 11,61411.6k $305.7k $305.7k 0.00% Unchanged
83 BOOTHBAY FUND MANAGEMENT, LLC 0.01% of their portfolio NEW YORK, NY 11,52311.5k $303.4k $303.4k 0.01% Reduced -26.6k -26,561
84 Tower Research Capital LLC (TRC) 0.01% of their portfolio NEW YORK, NY 11,41011.4k $300.4k $300.4k 0.01% Added +9.4k +9,442
85 Verition Fund Management LLC 0.00% of their portfolio GREENWICH, CT 10,30110.3k $271.2k $271.2k 0.00% Reduced -99 -99
86 Corton Capital Inc. 0.11% of their portfolio Carrying Place, A6 9,2939.3k $244.7k $244.7k 0.11% New
87 ARIZONA STATE RETIREMENT SYSTEM 0.00% of their portfolio PHOENIX, AZ 8,4568.5k $222.6k $222.6k 0.00% New
88 VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.00% of their portfolio JUPITER, FL 8,1718.2k $215.1k $215.1k 0.00% New
89 TEACHER RETIREMENT SYSTEM OF TEXAS 0.00% of their portfolio AUSTIN, TX 8,1688.2k $215.0k $215.0k 0.00% New
90 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 5,7105.7k $150.3k $150.3k 0.00% Unchanged
91 EXCHANGE TRADED CONCEPTS, LLC 0.00% of their portfolio Oklahoma City, OK 5,4195.4k $142.7k $142.7k 0.00% New
92 NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio ALBANY, NY 4,4774.5k $117.9k $117.9k 0.00% Reduced -6.3k -6,309
93 Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio ZURICH, V8 4,2354.2k $111.5k $111.5k 0.00% Added +2.4k +2,399
94 VIRTUS ADVISERS, LLC 0.06% of their portfolio HARTFORD, CT 4,1034.1k $108.0k $108.0k 0.06% Reduced -3.2k -3,202
95 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 2,7802.8k $73.2k $73.2k 0.00% Reduced -690 -690
96 Coppell Advisory Solutions LLC 0.01% of their portfolio COPPELL, TX 1,7321.7k $47.1k $47.1k 0.01% New
97 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 1,5641.6k $41.2k $41.2k 0.00% Added +1.4k +1,403
98 SIGNATUREFD, LLC 0.00% of their portfolio ATLANTA, GA 1,1391.1k $30.0k $30.0k 0.00% Reduced -118 -118
99 QUADRANT CAPITAL GROUP LLC 0.00% of their portfolio CINCINNATI, OH 910910 $24.0k $24.0k 0.00% Unchanged
100 China Universal Asset Management Co., Ltd. 0.00% of their portfolio SHANGHAI, F4 610610 $16.1k $16.1k 0.00% Reduced -18 -18