ATLAS VENTURE ENTREPRENEURS FUND V LP

10% owner at ALNYLAM PHARMACEUTICALS, INC. · on record since Feb 27, 2006
10% owner at HELICOS BIOSCIENCES CORP · on record since May 31, 2007
10% owner at ACHILLION PHARMACEUTICALS INC · on record since Oct 25, 2006
10% owner at Isilon Systems, Inc. · on record since Dec 21, 2006
Director at HELICOS BIOSCIENCES CORP · on record since Dec 29, 2008
10% owner at MOMENTA PHARMACEUTICALS INC · on record since Jun 24, 2004
10% owner at Phase Forward Inc · on record since Jul 13, 2004
10% owner at NxStage Medical, Inc. · on record since Oct 27, 2005

Insider trading activity of ATLAS VENTURE ENTREPRENEURS FUND V LP

Transactions on record: 14; since Nov 2, 2006

Open-market buys: 1

Open-market sells: 8; $16.8M

Companies traded: 3; last filing Aug 18, 2010

Figures computed from official regulatory filings — .

Companies where ATLAS VENTURE ENTREPRENEURS FUND V LP has traded

Isilon Systems, Inc.8 tx · $16.8M · Aug 18, 2010
HELICOS BIOSCIENCES CORP2 tx · Dec 29, 2008
ACHILLION PHARMACEUTICALS INC4 tx · Nov 2, 2006

Track record of ATLAS VENTURE ENTREPRENEURS FUND V LP

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of ATLAS VENTURE ENTREPRENEURS FUND V LP

Co-insiders of ATLAS VENTURE ENTREPRENEURS FUND V LP

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
Isilon Systems, Inc.Listing unverified	Aug 18, 2010	Sell	-225,000	17.27	$3.9M		SEC
Isilon Systems, Inc.Listing unverified	Aug 18, 2010	Sell	-152,000	17.84	$2.7M		SEC
Isilon Systems, Inc.Listing unverified	Aug 18, 2010	Sell	-68,000	17.58	$1.2M		SEC
Isilon Systems, Inc.Listing unverified	Jul 28, 2010	Sell	-260,000	17.37	$4.5M	Unusual size	SEC
Isilon Systems, Inc.Listing unverified	Jul 28, 2010	Sell	-29,810	17.62	$525.3K		SEC
Isilon Systems, Inc.Listing unverified	May 13, 2010	Sell	-31,700	13.89	$440.3K		SEC
Isilon Systems, Inc.Listing unverified	May 13, 2010	Sell	-140,000	14.72	$2.1M		SEC
Isilon Systems, Inc.Listing unverified	May 13, 2010	Sell	-100,000	14.33	$1.4M		SEC
HELICOS BIOSCIENCES CORPListing unverified	Dec 29, 2008	BuyD (derivative)	5,172,417	—	n/a (No price was disclosed in the filing)	ClusterFirst in 12mo	SEC
HELICOS BIOSCIENCES CORPListing unverified	Dec 29, 2008	Buy	8,620,690	—	n/a (No price was disclosed in the filing)	conv 88ClusterFirst in 12mo	SEC
ACHILLION PHARMACEUTICALS INCListing unverified	Nov 2, 2006	Other	1,968,670	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ACHILLION PHARMACEUTICALS INCListing unverified	Nov 2, 2006	OtherD (derivative)	-4,629,610	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ACHILLION PHARMACEUTICALS INCListing unverified	Nov 2, 2006	OtherD (derivative)	-4,142,227	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ACHILLION PHARMACEUTICALS INCListing unverified	Nov 2, 2006	OtherD (derivative)	-6,071,207	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
Isilon Systems, Inc.Listing unverified	Aug 18, 2010	Sell	-225,000	17.27	$3.9M		SEC
Isilon Systems, Inc.Listing unverified	Aug 18, 2010	Sell	-152,000	17.84	$2.7M		SEC
Isilon Systems, Inc.Listing unverified	Aug 18, 2010	Sell	-68,000	17.58	$1.2M		SEC
Isilon Systems, Inc.Listing unverified	Jul 28, 2010	Sell	-260,000	17.37	$4.5M	Unusual size	SEC
Isilon Systems, Inc.Listing unverified	Jul 28, 2010	Sell	-29,810	17.62	$525.3K		SEC
Isilon Systems, Inc.Listing unverified	May 13, 2010	Sell	-31,700	13.89	$440.3K		SEC
Isilon Systems, Inc.Listing unverified	May 13, 2010	Sell	-140,000	14.72	$2.1M		SEC
Isilon Systems, Inc.Listing unverified	May 13, 2010	Sell	-100,000	14.33	$1.4M		SEC
HELICOS BIOSCIENCES CORPListing unverified	Dec 29, 2008	BuyD (derivative)	5,172,417	—	n/a (No price was disclosed in the filing)	ClusterFirst in 12mo	SEC
HELICOS BIOSCIENCES CORPListing unverified	Dec 29, 2008	Buy	8,620,690	—	n/a (No price was disclosed in the filing)	conv 88ClusterFirst in 12mo	SEC
ACHILLION PHARMACEUTICALS INCListing unverified	Nov 2, 2006	Other	1,968,670	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ACHILLION PHARMACEUTICALS INCListing unverified	Nov 2, 2006	OtherD (derivative)	-4,629,610	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ACHILLION PHARMACEUTICALS INCListing unverified	Nov 2, 2006	OtherD (derivative)	-4,142,227	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ACHILLION PHARMACEUTICALS INCListing unverified	Nov 2, 2006	OtherD (derivative)	-6,071,207	0.00	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC