Vault-13

MEIRAGTX HLDGS PLC MGTX

COM · Common Stock · CUSIP G59665102

103 institutional holders +3 vs Q3 2024
58,120,68458.1m shares reported held*
74.4% of all shares outstanding*
$353.8mreported value*
11 new 45 added 22 reduced 14 sold out net bought ≈ $2.0m (+325.1k 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 ($87.2k this quarter). Holder counts are more reliable. Shares outstanding: 78.2m as of 2024-10-29, 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 ≈ $6.09. Options: 5 managers hold calls ($1.7m notional), 3 hold puts ($233.6k).

Trends to Q4 2024

Institutional holders

Managers reporting a position, each quarter

050100150Q3 22: 100Q4 22: 99Q1 23: 92Q2 23: 80Q3 23: 76Q4 23: 87Q1 24: 97Q2 24: 96Q3 24: 100Q4 24: 103103Q3 22Q1 23Q3 23Q1 24Q3 24Q4 24
Numbers
QuarterHolders
Q3 2022100
Q4 202299
Q1 202392
Q2 202380
Q3 202376
Q4 202387
Q1 202497
Q2 202496
Q3 2024100
Q4 2024103

Buyers vs sellers

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

Bought or addedCut or sold out
1000100Q1 23: 44 bought or addedQ1 23: 45 cut or sold outQ2 23: 38 bought or addedQ2 23: 41 cut or sold outQ2 23Q3 23: 27 bought or addedQ3 23: 34 cut or sold outQ4 23: 44 bought or addedQ4 23: 29 cut or sold outQ4 23Q1 24: 48 bought or addedQ1 24: 38 cut or sold outQ2 24: 48 bought or addedQ2 24: 43 cut or sold outQ2 24Q3 24: 46 bought or addedQ3 24: 36 cut or sold outQ4 24: 56 bought or addedQ4 24: 36 cut or sold outQ4 24
Numbers
QuarterBought or addedCut or sold out
Q1 20234445
Q2 20233841
Q3 20232734
Q4 20234429
Q1 20244838
Q2 20244843
Q3 20244636
Q4 20245636

Calls vs puts

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

CallsPuts
$0$500k$1m$1.5m$2mQ1 24 calls: $72.1kQ1 24 puts: $225.6kQ1 24P/C 3.13Q2 24 calls: $130.6kQ2 24 puts: $200.7kQ2 24P/C 1.54Q3 24 calls: $87.2kQ3 24 puts: $264.2kQ3 24P/C 3.03Q4 24 calls: $1.7mQ4 24 puts: $233.6kQ4 24P/C 0.14
Numbers
QuarterCallsPutsP/C
Q1 2024$72.1k$225.6k3.13
Q2 2024$130.6k$200.7k1.54
Q3 2024$87.2k$264.2k3.03
Q4 2024$1.7m$233.6k0.14

Biggest buyers

Woodline Partners LP New +1,535,124+1.5m
BlackRock, Inc. Added +284,774+284.8k
Long Focus Capital Management, LLC New +189,745+189.7k
READYSTATE ASSET MANAGEMENT LP New +118,830+118.8k
UBS Group AG Added +91,962+92.0k
Knott David M Jr Added +90,377+90.4k
GEODE CAPITAL MANAGEMENT, LLC Added +80,407+80.4k
SUSQUEHANNA INTERNATIONAL GROUP, LLP Added +78,797+78.8k
VANGUARD GROUP INC Added +77,067+77.1k
Janney Montgomery Scott LLC New +75,318+75.3k

Biggest sellers

Prosight Management, LP Reduced -509,733-509.7k
Monashee Investment Management LLC Sold out -450,492-450.5k
JPMORGAN CHASE & CO Reduced -379,357-379.4k
J. Goldman & Co LP Reduced -308,759-308.8k
ADAGE CAPITAL PARTNERS GP, L.L.C. Reduced -194,521-194.5k
ROYCE & ASSOCIATES LP Reduced -185,117-185.1k
683 Capital Management, LLC Reduced -135,000-135.0k
Laurion Capital Management LP Sold out -128,282-128.3k
BANK OF MONTREAL /CAN/ Sold out -92,660-92.7k
Russell Investments Group, Ltd. Reduced -64,591-64.6k

Biggest calls

J. Goldman & Co LP New $1.7m271.9k shares
GROUP ONE TRADING LLC Added $49.3k8.1k shares
SIMPLEX TRADING, LLC Added $23.0k3.9k shares
CITADEL ADVISORS LLC Reduced $1.8k300 shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Biggest puts

CITADEL ADVISORS LLC Reduced $187.6k30.8k shares
SIMPLEX TRADING, LLC Reduced $46.0k7.6k 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.

HolderStakeChangeShares Last filed
PERCEPTIVE ADVISORS LLC 13D · may seek influence -0.3 pts · filed 2026-04-24 12.6% -0.3 pts 11.7m≈ $158.6m 2026-04-24
Rubric Capital Management LP 13G · institution +1.9 pts · filed 2026-08-14 9.8% +1.9 pts 9.1m≈ $122.9m 2026-08-14

Fell to 5% or below in the last year: Adage Capital Management, L.P. (4.9%, 2026-05-13), Prosight Management, LP (4.0%, 2026-02-13)

Insider purchases and sales in Q4 2024

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
101Q1 23: 0 buyingQ1 23: 0 sellingQ2 23: 1 buyingQ2 23: 0 sellingQ2 23Q3 23: 0 buyingQ3 23: 0 sellingQ4 23: 0 buyingQ4 23: 0 sellingQ4 23Q1 24: 0 buyingQ1 24: 0 sellingQ2 24: 0 buyingQ2 24: 0 sellingQ2 24Q3 24: 1 buyingQ3 24: 0 sellingQ4 24: 0 buyingQ4 24: 0 sellingQ4 24
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q1 20230—0——
Q2 20231$25.0m0——
Q3 20230—0——
Q4 20230—0——
Q1 20240—0——
Q2 20240—0——
Q3 20241$5.0m0——
Q4 20240—0——

None reported in Q4 2024.

Holders, Q4 2024

#ManagerLocationShares Value% of their portfolioChangeShares change
1 PERCEPTIVE ADVISORS LLC 2.13% of their portfolio NEW YORK, NY 12,581,10312.6m $76.6m $76.6m 2.13% Unchanged
2 Sanofi 42.60% of their portfolio Paris, I0 12,197,73712.2m $74.3m $74.3m 42.60% First filing
3 JOHNSON & JOHNSON 10.47% of their portfolio NEW BRUNSWICK, NJ 6,641,0646.6m $40.4m $40.4m 10.47% Unchanged
4 ADAGE CAPITAL PARTNERS GP, L.L.C. 0.05% of their portfolio Boston, MA 5,034,5785.0m $30.7m $30.7m 0.05% Reduced -194.5k -194,521
5 Prosight Management, LP 7.49% of their portfolio DALLAS, TX 4,390,8374.4m $26.7m $26.7m 7.49% Reduced -509.7k -509,733
6 BlackRock, Inc. 0.00% of their portfolio New York, NY 2,971,5243.0m $18.1m $18.1m 0.00% Added +284.8k +284,774
7 683 Capital Management, LLC 1.45% of their portfolio NEW YORK, NY 2,415,0002.4m $14.7m $14.7m 1.45% Reduced -135.0k -135,000
8 Woodline Partners LP 0.06% of their portfolio San Francisco, CA 1,535,1241.5m $9.3m $9.3m 0.06% New
9 Knoll Capital Management, LLC 4.90% of their portfolio MIAMI, FL 1,250,0001.2m $7.6m $7.6m 4.90% Unchanged
10 Erste Asset Management GmbH 0.05% of their portfolio VIENNA, C4 669,702669.7k $4.0m $4.0m 0.05% Unchanged
11 ROYCE & ASSOCIATES LP 0.03% of their portfolio New York, NY 610,275610.3k $3.7m $3.7m 0.03% Reduced -185.1k -185,117
12 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 602,290602.3k $3.7m $3.7m 0.00% Added +27.6k +27,563
13 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 570,646570.6k $3.5m $3.5m 0.00% Added +80.4k +80,407
14 J. Goldman & Co LP 0.12% of their portfolio NEW YORK, NY 550,520550.5k $3.4m $3.4m 0.12% Reduced -308.8k -308,759
15 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 458,916458.9k $2.8m $2.8m 0.00% Added +77.1k +77,067
16 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 398,813398.8k $2.4m $2.4m 0.00% Reduced -51.1k -51,081
17 Alyeska Investment Group, L.P. 0.01% of their portfolio CHICAGO, IL 330,182330.2k $2.0m $2.0m 0.01% Unchanged
18 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 315,665315.7k $1.9m $1.9m 0.00% Added +50.3k +50,267
19 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 305,977306.0k $1.9m $1.9m 0.00% Reduced -379.4k -379,357
20 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 282,306282.3k $1.7m $1.7m 0.00% Reduced -64.6k -64,591
21 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 268,353268.4k $1.6m $1.6m 0.00% Added +71.6k +71,607
22 PLATINUM INVESTMENT MANAGEMENT LTD 0.09% of their portfolio SYDNEY AUSTRALIA 2000, C3 250,000250.0k $1.5m $1.5m 0.09% Unchanged
23 Privium Fund Management B.V. 0.31% of their portfolio AMSTERDAM, P7 225,078225.1k $1.4m $1.4m 0.31% Added +11.1k +11,118
24 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 221,340221.3k $1.3m $1.3m 0.00% Added +20.5k +20,507
25 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 213,635213.6k $1.3m $1.3m 0.00% Added +21.3k +21,314
26 Nuveen Asset Management, LLC 0.00% of their portfolio CHICAGO, IL 191,311191.3k $1.2m $1.2m 0.00% Added +57.7k +57,737
27 Long Focus Capital Management, LLC 0.09% of their portfolio SAN JUAN, PR 189,745189.7k $1.2m $1.2m 0.09% New
28 WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio Boston, MA 151,126151.1k $920.4k $920.4k 0.00% Added +1.4k +1,379
29 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 147,755147.8k $899.8k $899.8k 0.00% Reduced -72 -72
30 BLAIR WILLIAM & CO/IL 0.00% of their portfolio CHICAGO, IL 132,533132.5k $807.1k $807.1k 0.00% Added +400 +400
31 D. E. Shaw & Co., Inc. 0.00% of their portfolio New York, NY 123,643123.6k $753.0k $753.0k 0.00% Added +36.0k +36,008
32 UBS Group AG 0.00% of their portfolio ZURICH, V8 119,484119.5k $727.7k $727.7k 0.00% Added +92.0k +91,962
33 READYSTATE ASSET MANAGEMENT LP 0.03% of their portfolio CHICAGO, IL 118,830118.8k $723.7k $723.7k 0.03% New
34 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 112,021112.0k $682.2k $682.2k 0.00% Added +13.0k +12,961
35 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 106,582106.6k $649.1k $649.1k 0.00% Added +10.2k +10,217
36 Knott David M Jr 0.21% of their portfolio SYOSSET, NY 95,08095.1k $579.0k $579.0k 0.21% Added +90.4k +90,377
37 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 91,52191.5k $557.4k $557.4k 0.00% Added +78.8k +78,797
38 DAVENPORT & Co LLC 0.00% of their portfolio RICHMOND, VA 77,20077.2k $470.1k $470.1k 0.00% Added +5.0k +5,000
39 Janney Montgomery Scott LLC 0.00% of their portfolio PHILADELPHIA, PA 75,31875.3k $459.0k $459.0k 0.00% New
40 Fort Sheridan Advisors LLC 0.06% of their portfolio HIGHLAND PARK, IL 69,95570.0k $426.0k $426.0k 0.06% Added +4.6k +4,557
41 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 63,89263.9k $389.1k $389.1k 0.00% Added +9.0k +9,007
42 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 54,89154.9k $334.3k $334.3k 0.00% Added +6.0k +5,993
43 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 50,39050.4k $306.9k $306.9k 0.00% Unchanged
44 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 48,85548.9k $297.5k $297.5k 0.00% Reduced -41.7k -41,707
45 LOS ANGELES CAPITAL MANAGEMENT LLC 0.00% of their portfolio LOS ANGELES, CA 46,37046.4k $282.4k $282.4k 0.00% Reduced -49.0k -48,990
46 LETKO, BROSSEAU & ASSOCIATES INC 0.01% of their portfolio MONTREAL, A8 45,30045.3k $275.9k $275.9k 0.01% Unchanged
47 CreativeOne Wealth, LLC 0.01% of their portfolio OVERLAND PARK, KS 43,99944.0k $268.0k $268.0k 0.01% Reduced -14.6k -14,575
48 TOCQUEVILLE ASSET MANAGEMENT L.P. 0.00% of their portfolio New York, NY 42,50042.5k $258.8k $258.8k 0.00% Added +1.4k +1,400
49 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 42,19842.2k $257.0k $257.0k 0.00% Added +13.1k +13,111
50 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 40,38240.4k $245.9k $245.9k 0.00% Added +10.9k +10,934
51 Trexquant Investment LP 0.00% of their portfolio STAMFORD, CT 39,34839.3k $239.6k $239.6k 0.00% New
52 KENNEDY CAPITAL MANAGEMENT LLC 0.00% of their portfolio ST LOUIS, MO 33,46933.5k $203.8k $203.8k 0.00% Added +6.2k +6,203
53 STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio MADISON, WI 33,35433.4k $203.1k $203.1k 0.00% Reduced -24.3k -24,346
54 MetLife Investment Management, LLC 0.00% of their portfolio Whippany, NJ 30,96431.0k $188.6k $188.6k 0.00% Added +12.7k +12,701
55 SkyView Investment Advisors, LLC 0.03% of their portfolio SHREWSBURY, NJ 30,00030.0k $183.0k $183.0k 0.03% Unchanged
56 HSBC HOLDINGS PLC 0.00% of their portfolio LONDON, X0 26,71526.7k $161.1k $161.1k 0.00% Reduced -17 -17
57 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio CAUSEWAY BAY, K3 26,27526.3k $160.0k $160.0k 0.00% Added +5.0k +5,010
58 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 23,58923.6k $143.7k $143.7k 0.00% Added +8.7k +8,714
59 Corebridge Financial, Inc. 0.00% of their portfolio HOUSTON, TX 23,14723.1k $141.0k $141.0k 0.00% Added +2.4k +2,405
60 SG Americas Securities, LLC 0.00% of their portfolio NEW YORK, NY 22,24022.2k $135.0k $135.0k 0.00% Added +2.6k +2,617
61 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 20,27020.3k $123.4k $123.4k 0.00% Added +7.6k +7,569
62 PUREfi Wealth, LLC 0.12% of their portfolio BOSTON, MA 20,00020.0k $121.8k $121.8k 0.12% First filing
63 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 18,04018.0k $109.9k $109.9k 0.00% Reduced -3.4k -3,402
64 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 17,97618.0k $110.0k $110.0k 0.00% Added +5.3k +5,259
65 ProShare Advisors LLC 0.00% of their portfolio BETHESDA, MD 16,81416.8k $102.4k $102.4k 0.00% Added +4.9k +4,910
66 China Universal Asset Management Co., Ltd. 0.01% of their portfolio SHANGHAI, F4 16,57116.6k $100.9k $100.9k 0.01% Added +1.7k +1,685
67 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio Toronto, A6 16,27716.3k $99.1k $99.1k 0.00% Reduced -620 -620
68 CIBC Private Wealth Group LLC 0.00% of their portfolio ATLANTA, GA 15,00015.0k $95.2k $95.2k 0.00% Unchanged
69 Polymer Capital Management (US) LLC 0.03% of their portfolio NEW YORK, NY 14,46714.5k $88.1k $88.1k 0.03% First filing
70 VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio ATLANTA, GA 12,87412.9k $78.4k $78.4k 0.00% Reduced -2.7k -2,714
71 INTECH INVESTMENT MANAGEMENT LLC 0.00% of their portfolio WEST PALM BEACH, FL 12,48712.5k $76.0k $76.0k 0.00% New
72 Engineers Gate Manager LP 0.00% of their portfolio NEW YORK, NY 12,33812.3k $75.1k $75.1k 0.00% New
73 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.00% of their portfolio TALLAHASSEE, FL 12,23712.2k $74.5k $74.5k 0.00% Unchanged
74 Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio TRENTON, NJ 11,66111.7k $71.0k $71.0k 0.00% First filing
75 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 7,9417.9k $49.0k $49.0k 0.00% Reduced -1.8k -1,839
76 NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio ALBANY, NY 7,2637.3k $44.2k $44.2k 0.00% Unchanged
77 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 5,9976.0k $36.5k $36.5k 0.00% Reduced -3.3k -3,322
78 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 4,9755.0k $30.3k $30.3k 0.00% Added +2.0k +2,016
79 Ameritas Investment Partners, Inc. 0.00% of their portfolio LINCOLN, NE 4,8714.9k $29.7k $29.7k 0.00% Added +2.5k +2,515
80 Legal & General Group Plc 0.00% of their portfolio London, X0 4,3394.3k $26.4k $26.4k 0.00% Unchanged
81 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio WEST SACRAMENTO, CA 3,4463.4k $21.0k $21.0k 0.00% Added +635 +635
82 Mirae Asset Global Investments Co., Ltd. 0.00% of their portfolio SEOUL, M5 2,6042.6k $16.2k $16.2k 0.00% Reduced -195 -195
83 FMR LLC 0.00% of their portfolio BOSTON, MA 2,3252.3k $14.2k $14.2k 0.00% Added +496 +496
84 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 2,3002.3k $14.0k $14.0k 0.00% Unchanged
85 SIMPLEX TRADING, LLC 0.00% of their portfolio CHICAGO, IL 2,2482.2k $13.0k $13.0k 0.00% Reduced -3.5k -3,493
86 Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio ZURICH, V8 1,9411.9k $11.8k $11.8k 0.00% Reduced -410 -410
87 GF FUND MANAGEMENT CO. LTD. 0.00% of their portfolio GUANGZHOU, F4 1,6411.6k $10.0k $10.0k 0.00% First filing
88 Sandy Spring Bank 0.00% of their portfolio Olney, MD 1,5001.5k $9.1k $9.1k 0.00% Added +500 +500
89 AMALGAMATED BANK 0.00% of their portfolio NEW YORK, NY 1,0371.0k $6.0k $6.0k 0.00% Unchanged
90 WASHINGTON TRUST Co 0.00% of their portfolio WESTERLY, RI 479479 $2.9k $2.9k 0.00% Unchanged
91 CWM, LLC 0.00% of their portfolio OMAHA, NE 472472 $3.0k $3.0k 0.00% Added +276 +276
92 Sterling Capital Management LLC 0.00% of their portfolio CHARLOTTE, NC 460460 $2.8k $2.8k 0.00% Added +392 +392
93 Versant Capital Management, Inc 0.00% of their portfolio PHOENIX, AZ 425425 $2.6k $2.6k 0.00% Added +236 +236
94 SBI Securities Co., Ltd. 0.00% of their portfolio TOKYO, M0 224224 $1.4k $1.4k 0.00% First filing
95 NISA INVESTMENT ADVISORS, LLC 0.00% of their portfolio ST. LOUIS, MO 198198 $1.2k $1.2k 0.00% Added +174 +174
96 Daiwa Securities Group Inc. 0.00% of their portfolio CHIYODA-KU,TOKYO, M0 130130 $1.0k $1.0k 0.00% Unchanged
97 GAMMA Investing LLC 0.00% of their portfolio FOSTER CITY, CA 120120 $731 $731 0.00% New
98 Arax Advisory Partners 0.00% of their portfolio NEW YORK, NY 113113 $689 $689 0.00% Added +40 +40
99 LAZARD ASSET MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 9696 $0 $0 0.00% Unchanged
100 ROTHSCHILD INVESTMENT LLC 0.00% of their portfolio CHICAGO, IL 9595 $579 $579 0.00% New