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Aspen Aerogels
ASPN

Name Holding Trade Value Shares
Change 		Change in
Stake
Fidelity Investments
1
Fidelity Investments
Massachusetts
$75.6M +$74.3M +6,845,215 New
GKFF
2
George Kaiser Family Foundation
Oklahoma
$35M +$34.4M +3,167,322 New
RO
3
Reservoir Operations
New York
$31.8M +$31.2M +2,877,747 New
T. Rowe Price Associates
4
T. Rowe Price Associates
Maryland
$14.6M +$14.4M +1,323,790 New
Barclays
5
Barclays
United Kingdom
$11.9M +$11.8M +1,083,445 New
Federated Hermes
6
Federated Hermes
Pennsylvania
$7.6M +$7.46M +687,553 New
PRCM
7
Pine River Capital Management
Minnesota
$7.57M +$7.43M +684,988 New
GGHC
8
Gilder Gagnon Howe & Co
New York
$7.2M +$7.06M +651,219 New
Wellington Management Group
9
Wellington Management Group
Massachusetts
$6.32M +$6.21M +572,100 New
California Public Employees Retirement System
10
California Public Employees Retirement System
California
$3.37M +$3.31M +305,000 New
NC
11
NBW Capital
Massachusetts
$2.46M +$2.41M +222,175 New
AAM
12
ACK Asset Management
Connecticut
$2.21M +$2.17M +200,000 New
Vanguard Group
13
Vanguard Group
Pennsylvania
$1.39M +$1.37M +125,900 New
GL
14
GLG LLC
New York
$1.38M +$1.36M +125,000 New
CLG
15
Cooperman Leon G
$1.1M +$1.08M +100,000 New
SC
16
Sculptor Capital
New York
$1.07M +$1.05M +96,801 New
Millennium Management
17
Millennium Management
New York
$817K +$802K +73,894 New
Northern Trust
18
Northern Trust
Illinois
$678K +$666K +61,362 New
LBH
19
Lehman Brothers Holdings
New York
$416K +$408K +37,642 New
BPC
20
Banque Pictet & Cie
Switzerland
$352K +$346K +31,869 New
MF
21
Magnetar Financial
Illinois
$332K +$325K +30,000 New
WJA
22
Williams Jones & Associates
New York
$231K +$227K +20,900 New
DCM
23
Driehaus Capital Management
Illinois
$224K +$220K +20,316 New
Tudor Investment Corp
24
Tudor Investment Corp
Connecticut
$138K +$136K +12,500 New
TD Asset Management
25
TD Asset Management
Ontario, Canada
$133K +$130K +12,000 New
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