ImmunoGen Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

Insider Trading Volume

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of IMGN?
Owner Type	Number of Shares	Ownership Percentage
Private Companies	5,254	0.00196%
Individual Insiders	1,004,547	0.375%
General Public	14,766,766	5.52%
Hedge Funds	17,503,417	6.54%
Institutions	234,382,450	87.6%

Dilution of Shares: Shareholders have been diluted in the past year, with total shares outstanding growing by 21.3%.

Top Shareholders

Top 25 shareholders own 69% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
9.15%	The Vanguard Group, Inc.	24,482,155	US$764.6m	17.1%	0.01%
8.15%	BlackRock, Inc.	21,823,243	US$681.5m	7.64%	0.01%
6.61%	Janus Henderson Group plc	17,684,816	US$552.3m	14.1%	0.24%
6.54%	Redmile Group, LLC	17,503,417	US$546.6m	-1.28%	16.56%
4.98%	RA Capital Management, L.P.	13,322,288	US$416.1m	472%	5.41%
4.95%	Wellington Management Group LLP	13,258,997	US$414.1m	36%	0.06%
3.02%	State Street Global Advisors, Inc.	8,075,671	US$252.2m	-15.5%	0.01%
2.61%	D. E. Shaw & Co., L.P.	6,995,239	US$218.5m	11.4%	0.35%
2.22%	Fairmount Funds Management LLC	5,929,592	US$185.2m	-1.66%	13.37%
2.16%	FMR LLC	5,788,099	US$180.8m	3.13%	0.01%
2.07%	Norges Bank Investment Management	5,539,334	US$173.0m	0%	0.02%
1.83%	Geode Capital Management, LLC	4,899,975	US$153.0m	3.1%	0.01%
1.62%	Morgan Stanley, Investment Banking and Brokerage Investments	4,331,504	US$135.3m	46.1%	0.02%
1.46%	T. Rowe Price Group, Inc.	3,906,370	US$122.0m	68.2%	0.01%
1.39%	Artisan Partners Limited Partnership	3,724,583	US$116.3m	-0.04%	0.09%
1.39%	Pictet Asset Management Limited	3,708,139	US$115.8m	414%	0.08%
1.14%	Hood River Capital Management LLC	3,044,485	US$95.1m	2.04%	2.52%
1.11%	Tavistock Life Sciences	2,961,000	US$92.5m	0%	4.0%
1.1%	Emerald Advisers, LLC	2,933,190	US$91.6m	-10.5%	2.13%
1.08%	Teachers Insurance and Annuity Association-College Retirement Equities Fund	2,886,241	US$90.1m	0%	0.02%
0.94%	Maverick Capital, Ltd.	2,518,527	US$78.7m	-33.5%	1.63%
0.94%	Voloridge Investment Management, LLC	2,512,251	US$78.5m	23.7%	0.34%
0.91%	Woodline Partners LP	2,433,161	US$76.0m	-4.49%	0.81%
0.89%	Northern Trust Global Investments	2,370,864	US$74.0m	-1.05%	0.01%
0.76%	Sofinnova Investment, Inc.	2,045,202	US$63.9m	147%	3.04%