HoldingsChannel.com
Funds Holding MRSN

On this page, we present all of the funds holding MRSN from our database of 13F filers, detailed in the table below. The first column indicates the name of each of the funds holding MRSN, with a link to that fund's top holdings. The next columns indicate the amount of MRSN stock held by each of the funds holding MRSN, followed by the MRSN position size held by the fund, and lastly the date of the quarterly filing period the data represents. In total, we count 108 funds holding MRSN within the last two filing periods in our coverage universe of 13F filers, with the largest position size having been reported by EcoR1 Capital LLC. For more details on the positions held by EcoR1 Capital LLC (or by any of the other funds holding MRSN), click the fund name in the "Holder" column of the funds-holding-MRSN table below.

HolderAmountPosition Size
($ in 1000's)		 As of
EcoR1 Capital LLC19,364,688$44,926 12/31/2023
     MRSN19,364,688$44,926 12/31/2023
VR Adviser LLC11,328,000$26,281 12/31/2023
     MRSN11,328,000$26,281 12/31/2023
Balyasny Asset Management LLC9,698,147$22,500 12/31/2023
     MRSN9,698,147$22,500 12/31/2023
Bain Capital Life Sciences Investors LLC8,663,673$20,100 12/31/2023
     MRSN8,663,673$20,100 12/31/2023
BlackRock Inc.7,844,282$18,199 12/31/2023
     MRSN7,844,282$18,199 12/31/2023
Silverarc Capital Management LLC $15,595 12/31/2023
     MRSN6,420,136$14,895 12/31/2023
     Call301,600$700 12/31/2023
Vanguard Group Inc.6,237,588$14,471 12/31/2023
     MRSN6,237,588$14,471 12/31/2023
Nextech Invest AG5,978,327$13,870 12/31/2023
     MRSN5,978,327$13,870 12/31/2023
Morgan Stanley4,134,546$9,592 12/31/2023
     MRSN4,134,546$9,592 12/31/2023
Millennium Management LLC3,394,440$7,875 12/31/2023
     MRSN3,394,440$7,875 12/31/2023
Rock Springs Capital Management LP3,046,782$7,069 12/31/2023
     MRSN3,046,782$7,069 12/31/2023
Acuta Capital Partners LLC2,368,000$5,494 12/31/2023
     MRSN2,368,000$5,494 12/31/2023
State Street Corp2,329,434$5,404 12/31/2023
     MRSN2,329,434$5,404 12/31/2023
Geode Capital Management LLC2,297,136$5,330 12/31/2023
     MRSN2,297,136$5,330 12/31/2023
Citadel Advisors LLC $4,540 12/31/2023
     MRSN1,926,931$4,470 12/31/2023
     Call42,400$98 12/31/2023
     Put12,200$28 12/31/2023
5AM Venture Management LLC1,305,000$3,028 12/31/2023
     MRSN1,305,000$3,028 12/31/2023
Philosophy Capital Management LLC1,264,567$2,934 12/31/2023
     MRSN1,264,567$2,934 12/31/2023
Deutsche Bank AG1,139,232$2,643 12/31/2023
     MRSN1,139,232$2,643 12/31/2023
Schonfeld Strategic Advisors LLC1,139,407$2,643 12/31/2023
     MRSN1,139,407$2,643 12/31/2023
Baker BROS. Advisors LP1,086,115$2,520 12/31/2023
     MRSN1,086,115$2,520 12/31/2023
Affinity Asset Advisors LLC1,000,000$2,320 12/31/2023
     MRSN1,000,000$2,320 12/31/2023
Northern Trust Corp931,406$2,161 12/31/2023
     MRSN931,406$2,161 12/31/2023
Jacobs Levy Equity Management Inc.930,607$2,159 12/31/2023
     MRSN930,607$2,159 12/31/2023
Renaissance Technologies LLC865,731$2,008 12/31/2023
     MRSN865,731$2,008 12/31/2023
Atom Investors LP774,659$1,797 12/31/2023
     MRSN774,659$1,797 12/31/2023
Bank of New York Mellon Corp378,737$1,697 03/31/2024
     MRSN378,737$1,697 03/31/2024
D. E. Shaw & Co. Inc.667,383$1,548 12/31/2023
     MRSN667,383$1,548 12/31/2023
UBS Oconnor LLC555,645$1,289 12/31/2023
     MRSN555,645$1,289 12/31/2023
FMR LLC535,628$1,243 12/31/2023
     MRSN535,628$1,243 12/31/2023
Los Angeles Capital Management & Equity Research Inc.197,163$883 03/31/2024
     MRSN197,163$883 03/31/2024
Charles Schwab Investment Management Inc.308,072$715 12/31/2023
     MRSN308,072$715 12/31/2023
Readystate Asset Management LP295,038$684 12/31/2023
     MRSN295,038$684 12/31/2023
Panagora Asset Management Inc.251,382$583 12/31/2023
     MRSN251,382$583 12/31/2023
Bridgeway Capital Management Inc.232,300$539 12/31/2023
     MRSN232,300$539 12/31/2023
Susquehanna International Group LLP $462 12/31/2023
     MRSN152,781$354 12/31/2023
     Call46,400$108 12/31/2023
HealthInvest Partners AB100,000$448 03/31/2024
     MRSN100,000$448 03/31/2024
Acadian Asset Management LLC175,808$407 12/31/2023
     MRSN175,808$407 12/31/2023
Two Sigma Investments LP171,345$398 12/31/2023
     MRSN171,345$398 12/31/2023
Bank of America Corp DE162,064$376 12/31/2023
     MRSN162,064$376 12/31/2023
Rhumbline Advisers160,071$371 12/31/2023
     MRSN160,071$371 12/31/2023
Marshall Wace LLP157,800$366 12/31/2023
     MRSN157,800$366 12/31/2023
UBS Group AG153,276$356 12/31/2023
     MRSN153,276$356 12/31/2023
Barclays PLC152,064$352 12/31/2023
     MRSN152,064$352 12/31/2023
Two Sigma Advisers LP151,400$351 12/31/2023
     MRSN151,400$351 12/31/2023
Macquarie Group Ltd.150,000$348 12/31/2023
     MRSN150,000$348 12/31/2023
Goldman Sachs Group Inc.145,565$338 12/31/2023
     MRSN145,565$338 12/31/2023
Alliancebernstein L.P.118,180$274 12/31/2023
     MRSN118,180$274 12/31/2023
Cubist Systematic Strategies LLC115,656$268 12/31/2023
     MRSN115,656$268 12/31/2023
Exchange Traded Concepts LLC56,930$255 03/31/2024
     MRSN56,930$255 03/31/2024
HRT Financial LP105,815$245 12/31/2023
     MRSN105,815$245 12/31/2023
Foundations Investment Advisors LLC102,000$237 12/31/2023
     MRSN102,000$237 12/31/2023
Dimensional Fund Advisors LP101,665$236 12/31/2023
     MRSN101,665$236 12/31/2023
Amundi95,540$222 12/31/2023
     MRSN95,540$222 12/31/2023
Susquehanna Portfolio Strategies LLC93,878$218 12/31/2023
     MRSN93,878$218 12/31/2023
JPMorgan Chase & Co.78,823$183 12/31/2023
     MRSN78,823$183 12/31/2023
LPL Financial LLC76,694$178 12/31/2023
     MRSN76,694$178 12/31/2023
Price T Rowe Associates Inc. MD74,970$174 12/31/2023
     MRSN74,970$174 12/31/2023
Nuveen Asset Management LLC65,881$153 12/31/2023
     MRSN65,881$153 12/31/2023
QVT Financial LP62,657$145 12/31/2023
     MRSN62,657$145 12/31/2023
American International Group Inc.55,108$128 12/31/2023
     MRSN55,108$128 12/31/2023
Invesco Ltd.48,730$113 12/31/2023
     MRSN48,730$113 12/31/2023
Group One Trading L.P. $111 12/31/2023
     MRSN31,081$72 12/31/2023
     Call19,100$44 12/31/2023
     Put2,000$5 12/31/2023
Harbor Capital Advisors Inc.47,472$110 12/31/2023
     MRSN47,472$110 12/31/2023
MetLife Investment Management LLC46,642$108 12/31/2023
     MRSN46,642$108 12/31/2023
Voya Investment Management LLC46,033$107 12/31/2023
     MRSN46,033$107 12/31/2023
Man Group plc44,600$103 12/31/2023
     MRSN44,600$103 12/31/2023
Engineers Gate Manager LP43,694$101 12/31/2023
     MRSN43,694$101 12/31/2023
BNP Paribas Arbitrage SA42,496$99 12/31/2023
     MRSN42,496$99 12/31/2023
The Manufacturers Life Insurance Company 41,657$97 12/31/2023
     MRSN41,657$97 12/31/2023
Ameriprise Financial Inc.41,004$95 12/31/2023
     MRSN41,004$95 12/31/2023
SG Americas Securities LLC39,226$91 12/31/2023
     MRSN39,226$91 12/31/2023
New York State Common Retirement Fund37,249$86 12/31/2023
     MRSN37,249$86 12/31/2023
Royal Bank of Canada34,863$81 12/31/2023
     MRSN34,863$81 12/31/2023
Principal Financial Group Inc.33,477$78 12/31/2023
     MRSN33,477$78 12/31/2023
AQR Capital Management LLC31,559$73 12/31/2023
     MRSN31,559$73 12/31/2023
Wells Fargo & Company MN30,831$72 12/31/2023
     MRSN30,831$72 12/31/2023
Grimes & Company Inc.15,347$69 03/31/2024
     MRSN15,347$69 03/31/2024
Legal & General Group Plc29,527$69 12/31/2023
     MRSN29,527$69 12/31/2023
Hunter Perkins Capital Management LLC15,000$67 03/31/2024
     MRSN15,000$67 03/31/2024
State Board of Administration of Florida Retirement System28,800$67 12/31/2023
     MRSN28,800$67 12/31/2023
Simplex Trading LLC $61 03/31/2024
     MRSN8,040$36 03/31/2024
     Call5,600$25 03/31/2024
     Put100$0 03/31/2024
Pale Fire Capital SE25,400$59 12/31/2023
     MRSN25,400$59 12/31/2023
Point72 Middle East FZE25,511$59 12/31/2023
     MRSN25,511$59 12/31/2023
Tower Research Capital LLC TRC 24,533$57 12/31/2023
     MRSN24,533$57 12/31/2023
Prio Wealth Limited Partnership23,529$55 12/31/2023
     MRSN23,529$55 12/31/2023
Jasper Ridge Partners L.P.23,100$54 12/31/2023
     MRSN23,100$54 12/31/2023
ProShare Advisors LLC18,350$43 12/31/2023
     MRSN18,350$43 12/31/2023
California State Teachers Retirement System18,249$42 12/31/2023
     MRSN18,249$42 12/31/2023
Nisa Investment Advisors LLC17,643$41 12/31/2023
     MRSN17,643$41 12/31/2023
Citigroup Inc.15,974$37 12/31/2023
     MRSN15,974$37 12/31/2023
Public Employees Retirement System of Ohio15,800$37 12/31/2023
     MRSN15,800$37 12/31/2023
Squarepoint Ops LLC13,668$32 12/31/2023
     MRSN13,668$32 12/31/2023
Victory Capital Management Inc.12,732$30 12/31/2023
     MRSN12,732$30 12/31/2023
Bayesian Capital Management LP11,900$28 12/31/2023
     MRSN11,900$28 12/31/2023
Graham Capital Management L.P.11,811$27 12/31/2023
     MRSN11,811$27 12/31/2023
Quantbot Technologies LP10,945$25 12/31/2023
     MRSN10,945$25 12/31/2023
Ameritas Investment Partners Inc.9,896$23 12/31/2023
     MRSN9,896$23 12/31/2023
Amalgamated Bank3,769$17 03/31/2024
     MRSN3,769$17 03/31/2024
Advisor Group Holdings Inc.3,835$9 12/31/2023
     MRSN3,835$9 12/31/2023
Strs Ohio2,500$6 12/31/2023
     MRSN2,500$6 12/31/2023
Metropolitan Life Insurance Co NY1,558$4 12/31/2023
     MRSN1,558$4 12/31/2023
Russell Investments Group Ltd.878$2 12/31/2023
     MRSN878$2 12/31/2023
CWM LLC5$0 03/31/2024
     MRSN5$0 03/31/2024
The PNC Financial Services Group Inc.200$0 12/31/2023
     MRSN200$0 12/31/2023
Proequities Inc. $0 12/31/2023
     Put0$0 12/31/2023
     Call0$0 12/31/2023
     MRSN0$0 12/31/2023
North Star Investment Management Corp.150$0 12/31/2023
     MRSN150$0 12/31/2023
Advisory Services Network LLC100$0 12/31/2023
     MRSN100$0 12/31/2023
Farther Finance Advisors LLC1$0 12/31/2023
     MRSN1$0 12/31/2023
Jane Street Group LLC371,023$-28 12/31/2023
     Put383,200$889 12/31/2023
     MRSN371,023$861 12/31/2023

See Summary: Institutional Holders of MRSN
See Details: Top 10 Hedge Funds Holding MRSN
Also See: MRSN Insider Buying
Also See: MRSN Holdings Changes

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