Aspen Aerogels Inc (ASPN)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Kim, Llc	12,280,426	$145,891,461	18.38%
2.	Blackrock, Inc.	5,001,205	$59,414,314	0%
3.	Vanguard Group Inc	4,360,246	$51,799,723	0%
4.	Oaktop Capital Management Ii, L.p.	3,740,525	$44,437,437	5.54%
5.	George Kaiser Family Foundation	3,167,322	$37,627,785	5.54%