0001104659-21-130031.txt : 20211026
0001104659-21-130031.hdr.sgml : 20211026
20211026170425
ACCESSION NUMBER: 0001104659-21-130031
CONFORMED SUBMISSION TYPE: 4
PUBLIC DOCUMENT COUNT: 1
CONFORMED PERIOD OF REPORT: 20211026
FILED AS OF DATE: 20211026
DATE AS OF CHANGE: 20211026
REPORTING-OWNER:
OWNER DATA:
COMPANY CONFORMED NAME: Rock Springs Capital Management LP
CENTRAL INDEX KEY: 0001595725
STATE OF INCORPORATION: DE
FISCAL YEAR END: 1231
FILING VALUES:
FORM TYPE: 4
SEC ACT: 1934 Act
SEC FILE NUMBER: 001-40925
FILM NUMBER: 211349451
BUSINESS ADDRESS:
STREET 1: 650 SOUTH EXETER STREET
STREET 2: SUITE 1070
CITY: BALTIMORE
STATE: MD
ZIP: 21202
BUSINESS PHONE: 4102200129
MAIL ADDRESS:
STREET 1: 650 SOUTH EXETER STREET
STREET 2: SUITE 1070
CITY: BALTIMORE
STATE: MD
ZIP: 21202
REPORTING-OWNER:
OWNER DATA:
COMPANY CONFORMED NAME: Rock Springs Capital Master Fund LP
CENTRAL INDEX KEY: 0001735393
STATE OF INCORPORATION: DE
FISCAL YEAR END: 1231
FILING VALUES:
FORM TYPE: 4
SEC ACT: 1934 Act
SEC FILE NUMBER: 001-40925
FILM NUMBER: 211349449
BUSINESS ADDRESS:
STREET 1: 650 SOUTH EXETER STREET
STREET 2: SUITE 1070
CITY: BALTIMORE
STATE: MD
ZIP: 21202
BUSINESS PHONE: 410-220-0142
MAIL ADDRESS:
STREET 1: 190 ELGIN AVENUE
CITY: GEORGE TOWN
STATE: E9
ZIP: KY1 9001
REPORTING-OWNER:
OWNER DATA:
COMPANY CONFORMED NAME: Four Pines Master Fund LP
CENTRAL INDEX KEY: 0001888685
STATE OF INCORPORATION: E9
FISCAL YEAR END: 1231
FILING VALUES:
FORM TYPE: 4
SEC ACT: 1934 Act
SEC FILE NUMBER: 001-40925
FILM NUMBER: 211349448
BUSINESS ADDRESS:
STREET 1: 190 ELGIN AVENUE
CITY: GEORGE TOWN
STATE: E9
ZIP: KY1-9008
BUSINESS PHONE: 410-220-0130
MAIL ADDRESS:
STREET 1: 650 SOUTH EXETER STREET
STREET 2: SUITE 1070
CITY: BALTIMORE
STATE: MD
ZIP: 21202
REPORTING-OWNER:
OWNER DATA:
COMPANY CONFORMED NAME: Rock Springs Capital LLC
CENTRAL INDEX KEY: 0001735397
STATE OF INCORPORATION: DE
FISCAL YEAR END: 1231
FILING VALUES:
FORM TYPE: 4
SEC ACT: 1934 Act
SEC FILE NUMBER: 001-40925
FILM NUMBER: 211349450
BUSINESS ADDRESS:
STREET 1: 650 SOUTH EXETER STREET
STREET 2: SUITE 1070
CITY: BALTIMORE
STATE: MD
ZIP: 21202
BUSINESS PHONE: 410-220-0142
MAIL ADDRESS:
STREET 1: 650 SOUTH EXETER STREET
STREET 2: SUITE 1070
CITY: BALTIMORE
STATE: MD
ZIP: 21202
ISSUER:
COMPANY DATA:
COMPANY CONFORMED NAME: Xilio Therapeutics, Inc.
CENTRAL INDEX KEY: 0001840233
STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834]
IRS NUMBER: 851623397
STATE OF INCORPORATION: DE
FISCAL YEAR END: 1231
BUSINESS ADDRESS:
STREET 1: 828 WINTER STREET
CITY: WALTHAM
STATE: MA
ZIP: 02451
BUSINESS PHONE: 617-833-1027
MAIL ADDRESS:
STREET 1: 828 WINTER STREET
CITY: WALTHAM
STATE: MA
ZIP: 02451
4
1
tm2130646-27_4seq1.xml
OWNERSHIP DOCUMENT
X0306
4
2021-10-26
1
0001840233
Xilio Therapeutics, Inc.
XLO
0001595725
Rock Springs Capital Management LP
650 SOUTH EXETER ST., SUITE 1070
BALTIMORE,
MD
21202
0
0
1
0
0001735397
Rock Springs Capital LLC
650 SOUTH EXETER STREET
SUITE 1070
BALTIMORE
MD
21202
0
0
1
0
0001735393
Rock Springs Capital Master Fund LP
190 ELGIN AVENUE
GEORGE TOWN
E9
KY1 9001
CAYMAN ISLANDS
0
0
1
0
0001888685
Four Pines Master Fund LP
650 SOUTH EXETER STREET
SUITE 1070
BALTIMORE
MD
21202
0
0
1
0
Common Stock
2021-10-26
4
C
0
756472
A
756472
I
See footnote
Common Stock
2021-10-26
4
C
0
151294
A
151294
I
See footnote
Common Stock
2021-10-26
4
P
0
500000
16.00
A
1256472
I
See footnote
Series C Preferred Stock
2021-10-26
4
C
0
7186490
D
Common Stock
756472
0
I
See footnote
Series C Preferred Stock
2021-10-26
4
C
0
1437297
D
Common Stock
151294
0
I
See footnote
The Series C Preferred Stock converted into shares of the Issuer's common stock, $0.001 par value, on a 9.5:1 basis automatically immediately prior to the closing of the Issuer's initial public offering. The Series C Preferred Stock had no expiration date.
The securities reported herein are held of record by Rock Springs Capital Master Fund LP ("Master Fund"). Rock Springs Capital LLC ("RSC") is the general partner of Rock Springs Capital Management LP ("RSCM") which is the investment manager to Master Fund. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Master Fund.
The securities reported herein are held of record by Four Pines Master Fund LP ("Four Pines"). RSC is the general partner of RSCM which is the investment manager to Four Pines. RSC and RSCM may therefore be deemed to have or share beneficial ownership of the shares held directly by Four Pines.
By: /s/ Mark Bussard, Authorized Signatory, Rock Springs Capital Management LP
2021-10-26
By: /s/ Mark Bussard, Authorized Signatory, Rock Springs Capital LLC
2021-10-26
By: /s/ Mark Bussard, Authorized Signatory, Rock Springs Capital Master Fund LP
2021-10-26
By: /s/ Mark Bussard, Authorized Signatory, Four Pines Master Fund LP
2021-10-26