Aspen Aerogels Inc (ASPN)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Kim, Llc	12,280,426	$78,471,922	9.04%
2.	Blackrock, Inc.	4,960,172	$31,695,500	0%
3.	Oaktop Capital Management Ii, L.p.	4,394,525	$28,081,015	3.74%
4.	Vanguard Group Inc	4,373,159	$27,944,486	0%
5.	George Kaiser Family Foundation	3,167,322	$20,239,188	2.97%