The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE
OMB APPROVAL
OMB Number: 3235-0006
Estimated average burden
hours per response: 23.8
COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
ASANA INC CL A 04342Y104 1,122 37,970 SH   SOLE N/A 37,970 0 0
GENERATION BIO CO COM 37148K100 8,870 312,876 SH   SOLE N/A 312,876 0 0
MICROSOFT CORP COM 594918104 1,040 4,678 SH   SOLE N/A 4,678 0 0
PROGYNY INC COM 74340E103 1,043 24,597 SH   SOLE N/A 24,597 0 0
RIBBON COMMUNICATIONS INC COM 762544104 86 13,085 SH   SOLE N/A 13,085 0 0
SERES THERAPEUTICS INC COM 81750R102 1,468 59,930 SH   SOLE N/A 59,930 0 0
TWILIO INC CL A 90138F102 912 2,695 SH   SOLE N/A 2,695 0 0
KYMERA THERAPEUTICS INC COM 501575104 28,724 463,298 SH   SOLE N/A 463,298 0 0
RAPT THERAPEUTICS INC COM 75382E109 1,449 73,383 SH   SOLE N/A 73,383 0 0
EVELO BIOSCIENCES INC COM 299734103 1,376 113,850 SH   SOLE N/A 113,850 0 0
KALEIDO BIOSCIENCES INC COM 483347100 1,366 150,150 SH   SOLE N/A 150,150 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 27,130 78 SH   SOLE N/A 78 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 256 1,100 SH   SOLE N/A 1,100 0 0