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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1230355	Trans1 Inc	TSON	Surgical & Medical Instruments & Apparatus (3841)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1306506	A Michael Carusi	C/O Advanced Technology Ventures 1000 Winter Street, Suite 3700 Waltham MA 02451		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2011-09-21	938,634	$3.25	2,894,702	No	4	P	Indirect	By Advanced Technology Ventures VII, L.P.
Common Stock	Acquisiton	2011-09-21	37,667	$3.25	116,163	No	4	P	Indirect	By Advanced Technology Ventures VII (B), L.P.
Common Stock	Acquisiton	2011-09-21	18,105	$3.25	55,836	No	4	P	Indirect	By Advanced Technology Ventures VII (C), L.P.
Common Stock	Acquisiton	2011-09-21	5,594	$3.25	17,249	No	4	P	Indirect	By ATV Entrepreneurs VII, L.P.

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	By Advanced Technology Ventures VII, L.P.
No	4	P	Indirect	By Advanced Technology Ventures VII (B), L.P.
No	4	P	Indirect	By Advanced Technology Ventures VII (C), L.P.
No	4	P	Indirect	By ATV Entrepreneurs VII, L.P.

Footnotes

The reported securities are owned directly by Advanced Technology Ventures VII, L.P. and indirectly by ATV Associates VII, L.L.C., as general partner of Advanced Technology Ventures VII, L.P. Mr. Carusi is a managing director of ATV Associates VII, L.L.C. and disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein.
The reported securities are owned directly by Advanced Technology Ventures VII (B), L.P. and indirectly by ATV Associates VII, L.L.C., as general partner of Advanced Technology Ventures VII (B), L.P. Mr. Carusi is a managing director of ATV Associates VII, L.L.C. and disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein.
The reported securities are owned directly by Advanced Technology Ventures VII (C), L.P. and indirectly by ATV Associates VII, L.L.C., as general partner of Advanced Technology Ventures VII (C), L.P. Mr. Carusi is a managing director of ATV Associates VII, L.L.C. and disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein.
The reported securities are owned directly by ATV Entrepreneurs VII, L.P. and indirectly by ATV Associates VII, L.L.C., as general partner of ATV Entrepreneurs VII, L.P. Mr. Carusi is a managing director of ATV Associates VII, L.L.C. and disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein.