0000919574-24-002174.txt : 20240325
0000919574-24-002174.hdr.sgml : 20240325
20240325210345
ACCESSION NUMBER: 0000919574-24-002174
CONFORMED SUBMISSION TYPE: 3
PUBLIC DOCUMENT COUNT: 1
CONFORMED PERIOD OF REPORT: 20240320
FILED AS OF DATE: 20240325
DATE AS OF CHANGE: 20240325
REPORTING-OWNER:
OWNER DATA:
COMPANY CONFORMED NAME: Casdin Partners GP, LLC
CENTRAL INDEX KEY: 0001534260
ORGANIZATION NAME:
STATE OF INCORPORATION: DE
FISCAL YEAR END: 1231
FILING VALUES:
FORM TYPE: 3
SEC ACT: 1934 Act
SEC FILE NUMBER: 001-40791
FILM NUMBER: 24780742
BUSINESS ADDRESS:
STREET 1: 1350 AVENUE OF THE AMERICAS
STREET 2: SUITE 1140
CITY: NEW YORK
STATE: NY
ZIP: 10019
BUSINESS PHONE: 212.300.5575
MAIL ADDRESS:
STREET 1: 1350 AVENUE OF THE AMERICAS
STREET 2: SUITE 1140
CITY: NEW YORK
STATE: NY
ZIP: 10019
REPORTING-OWNER:
OWNER DATA:
COMPANY CONFORMED NAME: Casdin Capital, LLC
CENTRAL INDEX KEY: 0001534261
ORGANIZATION NAME:
STATE OF INCORPORATION: DE
FISCAL YEAR END: 1231
FILING VALUES:
FORM TYPE: 3
SEC ACT: 1934 Act
SEC FILE NUMBER: 001-40791
FILM NUMBER: 24780744
BUSINESS ADDRESS:
STREET 1: 1350 AVENUE OF THE AMERICAS
STREET 2: SUITE 2600
CITY: NEW YORK
STATE: NY
ZIP: 10019
BUSINESS PHONE: 212.300.5575
MAIL ADDRESS:
STREET 1: 1350 AVENUE OF THE AMERICAS
STREET 2: SUITE 2600
CITY: NEW YORK
STATE: NY
ZIP: 10019
REPORTING-OWNER:
OWNER DATA:
COMPANY CONFORMED NAME: Casdin Eli
CENTRAL INDEX KEY: 0001534264
ORGANIZATION NAME:
FILING VALUES:
FORM TYPE: 3
SEC ACT: 1934 Act
SEC FILE NUMBER: 001-40791
FILM NUMBER: 24780741
MAIL ADDRESS:
STREET 1: 1350 AVENUE OF THE AMERICAS
STREET 2: SUITE 1140
CITY: NEW YORK
STATE: NY
ZIP: 10019
REPORTING-OWNER:
OWNER DATA:
COMPANY CONFORMED NAME: Casdin Partners Master Fund, L.P.
CENTRAL INDEX KEY: 0001534265
ORGANIZATION NAME:
STATE OF INCORPORATION: E9
FISCAL YEAR END: 1231
FILING VALUES:
FORM TYPE: 3
SEC ACT: 1934 Act
SEC FILE NUMBER: 001-40791
FILM NUMBER: 24780743
BUSINESS ADDRESS:
STREET 1: WALKER HOUSE
STREET 2: 87 MARY STREET
CITY: GEORGE TOWN
STATE: E9
ZIP: KY1-9001
BUSINESS PHONE: 212.300.5575
MAIL ADDRESS:
STREET 1: WALKER HOUSE
STREET 2: 87 MARY STREET
CITY: GEORGE TOWN
STATE: E9
ZIP: KY1-9001
ISSUER:
COMPANY DATA:
COMPANY CONFORMED NAME: 2seventy bio, Inc.
CENTRAL INDEX KEY: 0001860782
STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834]
ORGANIZATION NAME: 03 Life Sciences
IRS NUMBER: 863658454
STATE OF INCORPORATION: DE
FISCAL YEAR END: 1231
BUSINESS ADDRESS:
STREET 1: 60 BINNEY STREET
CITY: CAMBRIDGE
STATE: MA
ZIP: 02210
BUSINESS PHONE: 339-499-9300
MAIL ADDRESS:
STREET 1: 60 BINNEY STREET
CITY: CAMBRIDGE
STATE: MA
ZIP: 02210
3
1
ownership.xml
X0206
3
2024-03-20
0
0001860782
2seventy bio, Inc.
TSVT
0001534261
Casdin Capital, LLC
1350 AVENUE OF THE AMERICAS
SUITE 2600
NEW YORK
NY
10019
1
0
0
0
0001534265
Casdin Partners Master Fund, L.P.
1350 AVENUE OF THE AMERICAS
SUITE 2600
NEW YORK
NY
10019
1
0
0
0
0001534260
Casdin Partners GP, LLC
1350 AVENUE OF THE AMERICAS
SUITE 2600
NEW YORK
NY
10019
1
0
0
0
0001534264
Casdin Eli
1350 AVENUE OF THE AMERICAS
SUITE 2600
NEW YORK
NY
10019
1
0
0
0
Common Stock, par value $0.0001 per share
1182623
I
See footnote
Common Stock, par value $0.0001 per share
16600
D
Stock Options (Right to buy)
4.54
2034-03-20
Common Stock, par value $0.0001 per share
33400
D
Total Return Swap
Common Stock, par value $0.0001 per share
599935
I
See footnote
The securities are owned directly by Casdin Partners Master Fund, LP (the "Master Fund") and may be deemed to be indirectly beneficially owned by (i) Casdin Capital, LLC, the investment adviser to the Master Fund, (ii) Casdin Partners GP, LLC, the general partner of the Master Fund, and (ii) Eli Casdin, the managing member of Casdin Capital, LLC and Casdin Partners GP, LLC.
This restricted stock unit award vests ratable over three years in annual installments with the first installment vesting on March 20, 2025, subject to the Reporting Person's continued service through the applicable vesting date.
The securities are owned directly by Eli Casdin.
This stock option vests ratably over three years in annual installments with the first installment vesting on March 20, 2025, subject to the Reporting Person's continued service through the applicable vesting date.
The Master Fund has entered into certain cash-settled total return swap agreements (the "Swap Agreements"), which represent economic exposure to an aggregate of 599,935.15 notional shares of the Issuer's Common Stock, par value $0.0001 per share. The Swap Agreements provide the Master Fund with economic results that are comparable to the economic results of ownership but do not provide it with the power to vote or direct the voting or dispose of or direct the disposition of the securities that are referenced by the Swap Agreements.
Eli Casdin has been deputized to represent the Reporting Persons on the board of directors of the Issuer. By virtue of Mr. Casdin's representation, for purposes of Section 16 of the Securities Exchange Act of 1934 (the "Exchange Act"), each of the Reporting Persons may be deemed directors by deputization of the Issuer. Each Reporting Person disclaims beneficial ownership in the securities reported on this Form 3 except to the extent of its or his pecuniary interest, if any, therein, and this report shall not be deemed to be an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.
Casdin Capital LLC, By: /s/ Eli Casdin, Managing Member
2024-03-25
Casdin Partners Master Fund, LP, By: Casdin Partners GP, LLC, its General Partner, By: /s/ Eli Casdin, Managing Member
2024-03-25
Casdin Partners GP LLC, By: /s/ Eli Casdin, Managing Member
2024-03-25
/s/ Eli Casdin, Eli Casdin
2024-03-25