Zafgen Inc

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Zafgen Inc
TickerLRMR
CIK #0001374690
CUSIP517125100
SectorLife Sciences - Pharmaceutical Preparations
AddressOne Broadway, 8th Floor, Cambridge, MA 02142
Source [EDGAR]
Reg D Offering (Form D) Filed Raised Terms
Larimar Therapeutics Inc 2020-06-10 82.1 M Exemption: 506(b) · Duration: One year or less · Revenue: Decline to Disclose
Zafgen Inc 2012-12-05 21.8 M Exemption: 506 · Remaining: Indefinite · Duration: One year or less · Revenue: Decline to Disclose
CIK Filing 2011 - 2026
[0001374690] 10-K
[0001374690] 10-Q
[0001374690] 3
[0001374690] 4
[0001374690] 8-K
[0001374690] D
[0001374690] SC 13D
[0001374690] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Millennium Management LLC Larimar Therapeutics Inc [2025-06-17] 0.0
Opaleye Management Inc Larimar Therapeutics Inc [2025-04-16] 0.0
BlackRock Inc Larimar Therapeutics Inc [2025-02-04] 0.0
Goldman Sachs Group Inc Larimar Therapeutics Inc [2024-11-06] 7.0
RA Capital Management LP Larimar Therapeutics Inc [2024-02-26] 9.5
Verition Fund Management LLC Larimar Therapeutics Inc [2024-02-14] 6.4
Blue Owl Capital Holdings LP Larimar Therapeutics Inc [2024-02-14] 7.78
Janus Henderson Group PLC Larimar Therapeutics Inc [2023-08-18] 5.1
Perceptive Advisors LLC Larimar Therapeutics Inc [2023-02-14] 6.6
Opaleye Management Inc Larimar Therapeutics Inc [2022-02-18] 5.32
CHI Advisors LLC Larimar Therapeutics Inc [2021-03-02] 0.9
Logos Global Master Fund LP Larimar Therapeutics Inc [2021-02-16] 2.0
RA Capital Management LP Larimar Therapeutics Inc [2021-02-16] 9.9
Acuta Capital Partners LLC Larimar Therapeutics Inc [2021-02-16] 5.6
OrbiMed Advisors LLC Larimar Therapeutics Inc [2021-02-12] 4.77
Vivo Capital IX LLC Larimar Therapeutics Inc [2020-06-11] 1.0
Chondrial Therapeutics Holdings LLC Larimar Therapeutics Inc [2020-06-08] 39.8
Flynn James E Larimar Therapeutics Inc [2020-06-08] 39.76
SIO Capital Management LLC Zafgen Inc [2020-02-14] 6.11
Renaissance Technologies LLC Zafgen Inc [2020-02-12] 6.38
Sphera Funds Management Ltd Zafgen Inc [2020-02-11] 7.59
Chondrial Therapeutics Holdings LLC Zafgen Inc [2019-12-27] 14.4
EcoR1 Capital LLC Zafgen Inc [2019-10-15] 8.4
683 Capital Management LLC Zafgen Inc [2019-09-16] 6.2
Hirschman Orin Zafgen Inc [2019-08-16] 5.42
Armistice Capital LLC Zafgen Inc [2019-03-25] 5.6
BlackRock Inc Zafgen Inc [2019-02-08] 7.0
Great Point Partners LLC Zafgen Inc [2018-07-09] 0.52
State Street Corp Zafgen Inc [2016-02-16] 5.9
Franklin Resources Inc Zafgen Inc [2016-02-11] 7.3
Flynn James E Zafgen Inc [2016-02-01] 9.98
Flynn James E Zafgen Inc [2015-12-14] 4.94
Flynn James E Zafgen Inc [2015-11-30] 4.78
Foresite Capital Fund II LP Zafgen Inc [2015-10-23] 4.05
Third Rock Ventures LP Zafgen Inc [2015-02-13] 24.7
Atlas Venture Fund VII L P Zafgen Inc [2015-02-12] 24.81
Alta Partners VIII LP Zafgen Inc [2015-02-12] 5.1
FMR LLC Zafgen Inc [2014-07-10] 0.0
Form 3/4/5 Filer 2011 - 2026
Zafgen Inc
Hamilton Thomas Edward
Sherman Jeffrey W
Truitt Joseph
Leff Jonathan S
Thomas Frank E
Deerfield Management Company LP
Flynn James E
Deerfield Mgmt HIF LP
Deerfield Private Design Fund IV LP
Deerfield Mgmt III LP
Deerfield Capital LP
Deerfield Private Design Fund III LP
Deerfield Partners LP
Deerfield Healthcare Innovations Fund LP
Deerfield Mgmt IV LP
Clayton Russell
Shankar Gopi
Celano Michael
Ben-Maimon Carole
Barrett Peter
Daniel Thomas O
Chondrial Therapeutics Holdings LLC
Lamattina John L
Perez Robert J
McDonough Cameron Geoffrey
Everett Wendy
Singhal Priya
Hatfield Jeffrey S
Kim Dennis D
Allen Patricia L
McVeigh Brian
Atlas Venture Associates VII Inc
Atlas Venture Associates VII LP
Atlas Venture Fund VII L P
Hughes Thomas E
Booth Bruce
Heller Frances K
Deerfield Special Situations Fund LP
Deerfield International Master Fund LP
Secor Alicia
Loustau Patrick
Starr Kevin P
Goldberg Avi Y
TRV GP LLC
Third Rock Ventures LP
Levin Mark J
Tepper Robert I
Third Rock Ventures GP LP
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Deerfield Mgmt HIF LP +9
Common Stock
2026-02-27 Buy 1,084,010 $5.00 5,420,050
Deerfield Mgmt HIF LP +9
Common Stock
2026-02-27 Buy 2,000,000 $5.00 10,000,000
Deerfield Mgmt HIF LP +9
Common Stock
2026-02-27 Buy 1,084,012 $5.00 5,420,060
Deerfield Mgmt HIF LP +9
Common Stock
2026-02-27 Buy 831,978 $5.00 4,159,890
Hamilton Thomas Edward
Common Stock
2026-02-27 Buy 100,000 $5.00 500,000
Thomas Frank E
Common Stock
2026-02-27 Buy 5,000 $5.00 25,000
Sherman Jeffrey W
Common Stock
2026-02-27 Buy 5,000 $5.00 25,000
Shankar Gopi
Common Stock
2026-01-26 Grant 25,637 $0.00
Clayton Russell
Common Stock
2026-01-26 Grant 25,637 $0.00
Ben-Maimon Carole
Common Stock
2026-01-26 Grant 100,100 $0.00
Celano Michael
Common Stock
2026-01-26 Grant 37,604 $0.00
Shankar Gopi
Stock Option (Right to Buy) · derivative
2026-01-26 Grant 153,822 $0.00
Clayton Russell
Stock Option (Right to Buy) · derivative
2026-01-26 Grant 153,822 $0.00
Ben-Maimon Carole
Stock Option (Right to Buy) · derivative
2026-01-26 Grant 600,600 $0.00
Celano Michael
Stock Option (Right to Buy) · derivative
2026-01-26 Grant 225,622 $0.00
Deerfield Mgmt HIF LP +9
Common Stock
2025-07-31 Buy 3,387,529 $3.20 10,840,093
Deerfield Mgmt HIF LP +9
Common Stock
2025-07-31 Buy 3,387,539 $3.20 10,840,125
Deerfield Mgmt HIF LP +9
Common Stock
2025-07-31 Buy 2,599,932 $3.20 8,319,782
Hamilton Thomas Edward
Stock Option (Right to Buy) · derivative
2025-05-13 Grant 19,000 $0.00
Deerfield Management Company LP +1
Stock Option (Right to Buy) · derivative
2025-05-13 Grant 19,000 $0.00
showing 20 of 200 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 162 88,421,282
2025-12-31 136 72,835,488
2025-09-30 140 92,335,237
2025-06-30 117 67,132,048
2025-03-31 104 61,000,863
2024-12-31 119 63,995,688
2024-09-30 124 64,502,031
2024-06-30 107 65,626,113
2024-03-31 108 65,257,469
2023-12-31 70 39,671,325
2023-09-30 67 38,775,280
2023-06-30 66 39,031,292
Form 13F Holdings
Firm Period DFND Voting Shares
Hennion & Walsh Asset Management Inc [2026-06-30] SOLE 396,726 396,726
Cary Street Partners Financial LLC [2026-06-30] DFND 0 85,000
Wealth Enhancement Advisory Services LLC [2026-06-30] SOLE 1,615 63,680
Next Level Private LLC [2026-06-30] SOLE 0 41,700
Merit Financial Group LLC [2026-06-30] OTR 0 6,895
Farther Finance Advisors LLC [2026-06-30] SOLE 0 3,867
Merit Financial Group LLC [2026-06-30] SOLE 20 3,359
Gamma Investing LLC [2026-06-30] DFND 1,941 1,941
True Wealth Design LLC [2026-06-30] SOLE 0 1,550
IFP Advisors LLC [2026-06-30] SOLE 1,213 1,213
Fortitude Family Office LLC [2026-06-30] SOLE 382 382
Physician Wealth Advisors Inc [2026-06-30] SOLE 0 233
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