683 Capital Management LLC

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683 Capital Management LLC
CRD #156181
SEC #801-73162
CIK #0001404574
AUM 2,436.9 M (2026-03-30)
Employees 10 (50% Investors, 0% Brokers)
Phone212-554-2389
Address1700 Broadway
New York, NY 10019
Source [IAPD] [EDGAR]
Total AUM ($B)
3.02.41.81.20.60.02010201520212027
Sector Form 13F Holdings Value ($B)
Palantir Technologies Inc 0.3
Lilly Eli & Co 0.1
Nvidia Corp 0.1
Capital One Financial Corp 0.1
Alnylam Pharmaceuticals Inc 0.0
Carvana Co 0.0
Synta Pharmaceuticals Corp 0.0
Tesla Motors Inc 0.0
Protagonist Therapeutics Inc 0.0
Praxis Precision Medicines Inc 0.0
View All
Holdings by Sector ($B)
3.02.41.81.20.60.02011201620212027
Type Form D Funds Date Sold AUM
HF 683 Maiden Fund LP 2021-03-26 6.1 M
HF 683 Capital Partners LP [2012-02-06] 755.1 M 2,357.4 M
Filed 2026-03-31 (D/A) · Exemption 506(b), 3(c), 3(c)(7) · Minimum $1,000,000 · Remaining Indefinite · Duration More than one year · Net Assets Decline to Disclose
AUM Breakdown Accounts AUM ($B)
By Client Type
(a) Individuals (other than high net worth individuals) 0 0.0
(b) Individuals (high net worth individuals) 0 0.0
(c) Banking or thrift institutions 0 0.0
(d) Investment companies 0 0.0
(e) Business development companies 0 0.0
(f) Pooled investment vehicles 2 2.4
(g) Pension and profit sharing plans 0 0.0
(h) Charitable organizations 0 0.0
(i) State or municipal government entities 0 0.0
(j) Other investment advisers 0 0.0
(k) Insurance companies 0 0.0
(l) Sovereign wealth funds and foreign official institutions 0 0.0
(m) Corporations or other businesses not listed above 0 0.0
(n) Other 0 0.0
Total 2 2.4
By Discretionary
Discretionary 2 2.4
Non-Discretionary 0 0.0
Total 2 2.4
By Non-United States Persons
Non-United States Persons 0.7
United States Persons 1.7
Total 2 2.4
Form D Directors Role # Filings # Firms 2011 - 2026
Alaina Danley Director 111 32
Riyaz Nooruddin Director 61 22
Charl Grobler Director 7 5
Leon Den Exter Director 2 2
Joseph Patt Director 1 1
EDGAR Form CIK 2011 - 2026
13F-HR [0001404574]
3 [0001404574]
4 [0001404574]
SC 13D [0001404574]
SC 13G [0001404574]
Form 13D/13G Filer Form 13D/13G Subject Filed
683 Capital Management LLC Gossamer Bio Inc [2026-06-11]
683 Capital Management LLC Modular Medical Inc [2026-03-10]
683 Capital Management LLC Gossamer Bio Inc [2026-03-02]
683 Capital Management LLC Mereo Biopharma Group PLC [2026-01-06]
683 Capital Management LLC In8Bio Inc [2025-12-30]
683 Capital Management LLC Mersana Therapeutics Inc [2025-11-24]
683 Capital Management LLC Fractyl Health Inc [2025-10-14]
683 Capital Management LLC Immunic Inc [2025-08-08]
683 Capital Management LLC Affimed NV [2024-10-24]
683 Capital Management LLC Perceptive Capital Solutions Corp [2024-06-24]
View All
Firm Profile (Form ADV)
Discretionary AUM$0.6B
ServesInstitutional
Fund TypesHedge Fund
LEI6H8P3MPVST1J15UNVO87
Form 3/4/5 Subject 2011 - 2026
Zweiman Ari
683 Capital Partners LP
683 Capital Management LLC
Cactus Acquisition Corp 1 Ltd
NII Holdings Inc
Traws Pharma Inc
Body Central Corp
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
NII Holdings Inc NIHD
Common Stock, $0.001 par value
2019-10-10 Sell 3,000,000 $1.90 5,700,000
Traws Pharma Inc ONTX
Common Stock, $0.01 par value
2019-09-18 Sell 118,726 $2.18 258,823
Traws Pharma Inc ONTX
Common Stock, $0.01 par value
2019-09-18 Sell 120,000 $1.82 218,400
Traws Pharma Inc ONTX
Common Stock, $0.01 par value
2019-09-18 Sell 173,332 $2.18 377,864
Traws Pharma Inc ONTX
Common Stock, $0.01 par value
2019-09-18 Sell 93,286 $1.86 173,512
Traws Pharma Inc ONTX
Common Stock, $0.01 par value
2019-09-18 Sell 1,533 $2.20 3,373
NII Holdings Inc NIHD
Common Stock, $0.001 par value
2018-11-13 Sell 306,261 $7.34 2,247,956
NII Holdings Inc NIHD
Common Stock, $0.001 par value
2018-11-13 Sell 576,806 $6.93 3,997,266
Traws Pharma Inc ONTX
Common Stock, $0.01 par value
2018-04-27 Buy 11,838,235 $0.43 5,090,441
NII Holdings Inc NIHD
Common Stock, $0.001 par value
2018-03-09 Buy 500,000 $1.40 700,000
NII Holdings Inc NIHD
Common Stock, $0.001 par value
2018-02-26 Buy 167,253 $0.94 157,218
NII Holdings Inc NIHD
Common Stock, $0.001 par value
2018-02-23 Buy 705,792 $0.80 564,634
NII Holdings Inc NIHD
Common Stock, $0.001 par value
2018-02-23 Buy 1,300 $0.79 1,027
Traws Pharma Inc ONTX
Common Stock, $0.01 par value
2018-02-08 Buy 200,000 $1.04 208,000
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