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Filing Details

Accession Number:: 0001012975-15-000684
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2015-09-25 16:38:50
Reporting Period:: 2015-09-24

Filing Date:: 2015-09-25
Accepted Time:: 2015-09-25 16:38:50
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1374690	Zafgen Inc.	ZFGN	Pharmaceutical Preparations (2834)	203857670

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1192603	P Kevin Starr	C/O Third Rock Ventures, Llc 29 Newbury Street, 3Rd Floor Boston MA 02116		Yes	No	No	No

Reported Non-Derivative Transactions

Show Other Fields >>

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2015-09-24	1,655,095	$0.00	346,950	No	4	J	Indirect	See footnote
Common Stock	Disposition	2015-09-24	74,949	$43.73	272,001	No	4	S	Indirect	See footnote
Common Stock	Disposition	2015-09-24	61,630	$44.10	210,371	No	4	S	Indirect	See footnote
Common Stock	Acquisiton	2015-09-24	476,170	$0.00	476,170	No	4	J	Indirect	See footnote
Common Stock	Disposition	2015-09-24	476,170	$0.00	0	No	4	J	Indirect	See footnote
Common Stock	Acquisiton	2015-09-24	98,834	$0.00	370,323	No	4	J	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	J	Indirect	See footnote
No	4	S	Indirect	See footnote
No	4	S	Indirect	See footnote
No	4	J	Indirect	See footnote
No	4	J	Indirect	See footnote
No	4	J	Direct

Footnotes

Distribution of shares in kind by Third Rock Ventures, L.P. ("TRV") on a pro rata basis to its partners.
The shares are directly held by TRV. The general partner of TRV is Third Rock Ventures GP, L.P. ("TRV GP"). The general partner of TRV GP is TRV GP, LLC ("TRV GP LLC") and the Reporting Person is a Manager of TRV GP LLC, as such, each of TRV GP and TRV GP LLC, the other Managers of TRV GP LLC and the Reporting Person exercises shared voting and investment power over the shares held of record by TRV. The Reporting Person disclaims beneficial ownership of the shares except to the extent of his pecuniary interest therein, if any.
The shares are directly held by TRV. The general partner of TRV is Third Rock Ventures GP, L.P. ("TRV GP"). The general partner of TRV GP is TRV GP, LLC ("TRV GP LLC") and the Reporting Person is a Manager of TRV GP LLC, as such, each of TRV GP and TRV GP LLC, the other Managers of TRV GP LLC and the Reporting Person exercises shared voting and investment power over the shares held of record by TRV. The Reporting Person disclaims beneficial ownership of the shares except to the extent of his pecuniary interest therein, if any.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $44.00 to $44.48, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
TRV GP received shares distributed in kind by TRV on a pro rata basis to its partners.
The shares are directly held by TRV GP. As such, each of TRV GP LLC and the Reporting Person exercises shared voting and investment power over the shares held of record by TRV GP. The Reporting Person disclaims beneficial ownership of the shares except to the extent of his pecuniary interest therein, if any.
Distribution of shares in kind by TRV GP on a pro rata basis to its partners.
The Reporting Person received shares distributed in kind by TRV GP on a pro rata basis to its partners.