Vault-13

ASPEN AEROGELS INC ASPN

COM · Common Stock · CUSIP 04523Y105 · ISIN US04523Y1055

Company in Northborough, United States

140 institutional holders
37,071,01137.1m shares reported held*
90.6% of all shares outstanding*
$341.9mreported value*

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($2.1m this quarter). Holder counts are more reliable. Shares outstanding: 40.9m as of 2022-11-04, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $9.22. Options: 10 managers hold calls ($2.4m notional), 7 hold puts ($1.4m).

Biggest calls

AMH Equity Ltd — $559.0k606 shares
CITADEL ADVISORS LLC — $554.0k60.1k shares
SIMPLEX TRADING, LLC — $386.0k41.9k shares
G2 Investment Partners Management LLC — $323.0k35.0k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP — $235.0k25.5k shares
LEVIN CAPITAL STRATEGIES, L.P. — $184.0k20.0k shares
JANE STREET GROUP, LLC — $159.0k17.2k shares
GROUP ONE TRADING LLC — $14.0k1.5k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. — $00 shares
Cutler Group LLC / CA — $03.8k shares

Biggest puts

CITADEL ADVISORS LLC — $598.0k64.9k shares
SIMPLEX TRADING, LLC — $297.0k32.3k shares
PEAK6 Investments LLC — $213.0k23.1k shares
JANE STREET GROUP, LLC — $133.0k14.4k shares
GROUP ONE TRADING LLC — $93.0k10.1k shares
Cutler Group LLC / CA — $26.0k4.5k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. — $00 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
HIRSCHMAN ORIN 13G · institution new · filed 2026-10-19 8.6% new 7.2m≈ $45.3m 2026-10-19
OAKTOP CAPITAL MANAGEMENT II, L.P. 13G · institution no change · filed 2025-05-15 5.3% no change 4.4m≈ $27.9m 2025-05-15

Fell to 5% or below in the last year: Wood River Capital, LLC (0.0%, 2026-09-24), NEEDHAM INVESTMENT MANAGEMENT LLC (3.9%, 2026-08-13), VANGUARD GROUP INC (0.0%, 2026-03-26)

Insider purchases and sales in Q3 2022

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
404Q4 20: 0 buyingQ4 20: 0 sellingQ1 21: 0 buyingQ1 21: 0 sellingQ1 21Q2 21: 0 buyingQ2 21: 0 sellingQ3 21: 0 buyingQ3 21: 0 sellingQ3 21Q4 21: 0 buyingQ4 21: 3 sellingQ1 22: 1 buyingQ1 22: 0 sellingQ1 22Q2 22: 1 buyingQ2 22: 0 sellingQ3 22: 0 buyingQ3 22: 0 sellingQ3 22
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20200—0——
Q1 20210—0——
Q2 20210—0——
Q3 20210—0——
Q4 20210—3$8.2m—
Q1 20221—0——
Q2 20221$73.2k0——
Q3 20220—0——

None reported in Q3 2022.

Holders, Q3 2022

#ManagerLocationShares Value% of their portfolioChangeShares change
1 KIM, LLC 2.26% of their portfolio WICHITA, KS 5,254,1105.3m $48.4m $48.4m 2.26% —
2 OAKTOP CAPITAL MANAGEMENT II, L.P. 5.92% of their portfolio Chatham, NJ 3,194,7583.2m $29.5m $29.5m 5.92% —
3 George Kaiser Family Foundation 5.12% of their portfolio TULSA, OK 3,167,3223.2m $29.2m $29.2m 5.12% —
4 Encompass Capital Advisors LLC 1.29% of their portfolio New York, NY 2,419,2722.4m $22.3m $22.3m 1.29% —
5 Telemark Asset Management, LLC 2.89% of their portfolio BOSTON, MA 2,000,0002.0m $18.4m $18.4m 2.89% —
6 BlackRock Inc. 0.00% of their portfolio New York, NY 1,918,9841.9m $17.7m $17.7m 0.00% —
7 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 1,860,5761.9m $17.2m $17.2m 0.00% —
8 Driehaus Capital Management LLC 0.15% of their portfolio Chicago, IL 1,055,0171.1m $9.7m $9.7m 0.15% —
9 NEEDHAM INVESTMENT MANAGEMENT LLC 1.78% of their portfolio NEW YORK, NY 983,100983.1k $9.1m $9.1m 1.78% —
10 Cowen Prime Advisors LLC 3.87% of their portfolio New York, NY 731,350731.4k $6.7m $6.7m 3.87% —
11 ESSEX INVESTMENT MANAGEMENT CO LLC 0.93% of their portfolio BOSTON, MA 628,808628.8k $5.8m $5.8m 0.93% —
12 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 592,441592.4k $5.5m $5.5m 0.00% —
13 Samjo Capital LLC 6.57% of their portfolio NEW YORK, NY 584,000584.0k $5.4m $5.4m 6.57% —
14 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 580,043580.0k $5.3m $5.3m 0.00% —
15 Point72 Asset Management, L.P. 0.02% of their portfolio STAMFORD, CT 579,739579.7k $5.3m $5.3m 0.02% —
16 FMR LLC 0.00% of their portfolio BOSTON, MA 565,138565.1k $5.2m $5.2m 0.00% —
17 TWO SIGMA ADVISERS, LP 0.01% of their portfolio NEW YORK, NY 534,900534.9k $4.9m $4.9m 0.01% —
18 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 518,378518.4k $4.8m $4.8m 0.00% —
19 ROYCE & ASSOCIATES LP 0.05% of their portfolio New York, NY 517,283517.3k $4.8m $4.8m 0.05% —
20 Redwood Investments, LLC 0.60% of their portfolio BOSTON, MA 481,491481.5k $4.4m $4.4m 0.60% —
21 TWO SIGMA INVESTMENTS, LP 0.02% of their portfolio NEW YORK, NY 472,601472.6k $4.4m $4.4m 0.02% —
22 Nuveen Asset Management, LLC 0.00% of their portfolio CHICAGO, IL 459,271459.3k $4.2m $4.2m 0.00% —
23 Baird Financial Group, Inc. 0.01% of their portfolio MILWAUKEE, WI 448,923448.9k $4.1m $4.1m 0.01% —
24 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 425,923425.9k $3.9m $3.9m 0.00% —
25 G2 Investment Partners Management LLC 1.14% of their portfolio New York, NY 396,167396.2k $3.7m $3.7m 1.14% —
26 Assenagon Asset Management S.A. 0.01% of their portfolio SENNINGERBERG, N4 370,572370.6k $3.4m $3.4m 0.01% —
27 Jetstream Capital LLC 7.25% of their portfolio Brentwood, TN 370,000370.0k $3.4m $3.4m 7.25% —
28 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 354,320354.3k $3.3m $3.3m 0.00% —
29 D. E. Shaw & Co., Inc. 0.01% of their portfolio New York, NY 350,468350.5k $3.2m $3.2m 0.01% —
30 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 326,107326.1k $3.0m $3.0m 0.00% —
31 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio NEW YORK, NY 300,162300.2k $2.8m $2.8m 0.00% —
32 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 280,502280.5k $2.6m $2.6m 0.00% —
33 ZEVENBERGEN CAPITAL INVESTMENTS LLC 0.06% of their portfolio EDMONDS, WA 226,862226.9k $2.1m $2.1m 0.06% —
34 VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.01% of their portfolio JUPITER, FL 224,247224.2k $2.1m $2.1m 0.01% —
35 Clear Sky Carbon Solutions Investment Management, LLC 1.07% of their portfolio BELLAIRE, TX 195,000195.0k $1.8m $1.8m 1.07% —
36 KENNEDY CAPITAL MANAGEMENT LLC 0.05% of their portfolio ST LOUIS, MO 184,102184.1k $1.7m $1.7m 0.05% —
37 AFTON CAPITAL MANAGEMENT LLC 5.04% of their portfolio Charlotte, NC 167,119167.1k $1.5m $1.5m 5.04% —
38 Walleye Capital LLC 0.03% of their portfolio NEW YORK, NY 165,502165.5k $1.5m $1.5m 0.03% —
39 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 160,200160.2k $1.5m $1.5m 0.00% —
40 SILVERCREST ASSET MANAGEMENT GROUP LLC 0.01% of their portfolio NEW YORK, NY 147,619147.6k $1.4m $1.4m 0.01% —
41 ExodusPoint Capital Management, LP 0.02% of their portfolio NEW YORK, NY 140,137140.1k $1.3m $1.3m 0.02% —
42 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 138,960139.0k $1.3m $1.3m 0.00% —
43 ALGERT GLOBAL LLC 0.07% of their portfolio SAN FRANCISCO, CA 134,363134.4k $1.2m $1.2m 0.07% —
44 Redwood Grove Capital, LLC 0.67% of their portfolio New York, NY 133,210133.2k $1.2m $1.2m 0.67% —
45 Cubist Systematic Strategies, LLC 0.01% of their portfolio STAMFORD, CT 130,156130.2k $1.2m $1.2m 0.01% —
46 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 128,855128.9k $1.2m $1.2m 0.00% —
47 Sargent Investment Group, LLC 0.38% of their portfolio BETHESDA, MD 124,061124.1k $1.2m $1.2m 0.38% —
48 Trellus Management Company, LLC 1.71% of their portfolio Delray Beach, FL 106,463106.5k $982.0k $982.0k 1.71% —
49 LOS ANGELES CAPITAL MANAGEMENT LLC 0.00% of their portfolio LOS ANGELES, CA 103,555103.6k $955.0k $955.0k 0.00% —
50 GILDER GAGNON HOWE & CO LLC 0.02% of their portfolio New York, NY 101,042101.0k $932.0k $932.0k 0.02% —
51 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 100,677100.7k $928.0k $928.0k 0.00% —
52 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 100,500100.5k $927.0k $927.0k 0.00% —
53 STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio MADISON, WI 90,95291.0k $839.0k $839.0k 0.00% —
54 GREENWOOD CAPITAL ASSOCIATES LLC 0.14% of their portfolio GREENWOOD, SC 89,76789.8k $828.0k $828.0k 0.14% —
55 Bridgewater Advisors Inc. 0.23% of their portfolio NEW YORK, NY 89,00089.0k $821.0k $821.0k 0.23% —
56 BOOTHBAY FUND MANAGEMENT, LLC 0.02% of their portfolio NEW YORK, NY 86,39186.4k $797.0k $797.0k 0.02% —
57 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 79,09079.1k $730.0k $730.0k 0.00% —
58 Swiss National Bank 0.00% of their portfolio ZURICH, V8 77,00077.0k $710.0k $710.0k 0.00% —
59 UBS Group AG 0.00% of their portfolio ZURICH, V8 67,96568.0k $627.0k $627.0k 0.00% —
60 Allspring Global Investments Holdings, LLC 0.00% of their portfolio CHARLOTTE, NC 66,51066.5k $613.0k $613.0k 0.00% —
61 ADAGE CAPITAL PARTNERS GP, L.L.C. 0.00% of their portfolio Boston, MA 50,00050.0k $461.0k $461.0k 0.00% —
62 GUGGENHEIM CAPITAL LLC 0.00% of their portfolio CHICAGO, IL 42,69742.7k $393.0k $393.0k 0.00% —
63 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio WEST SACRAMENTO, CA 40,08040.1k $370.0k $370.0k 0.00% —
64 ARS Investment Partners, LLC 0.05% of their portfolio New York, NY 38,21238.2k $352.0k $352.0k 0.05% —
65 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 37,98338.0k $350.0k $350.0k 0.00% —
66 Jump Financial, LLC 0.01% of their portfolio Chicago, IL 37,70037.7k $348.0k $348.0k 0.01% —
67 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 37,01237.0k $341.0k $341.0k 0.00% —
68 Firsthand Capital Management, Inc. 0.29% of their portfolio SAN JOSE, CA 35,00035.0k $323.0k $323.0k 0.29% —
69 OCCUDO QUANTITATIVE STRATEGIES LP 0.02% of their portfolio FORT LAUDERDALE, FL 34,18234.2k $315.0k $315.0k 0.02% —
70 Mitsubishi UFJ Asset Management Co., Ltd. 0.00% of their portfolio TOKYO, M0 33,85433.9k $312.0k $312.0k 0.00% —
71 WOODMONT INVESTMENT COUNSEL LLC 0.04% of their portfolio NASHVILLE, TN 32,51932.5k $300.0k $300.0k 0.04% —
72 GSA CAPITAL PARTNERS LLP 0.04% of their portfolio LONDON, X0 31,93631.9k $294.0k $294.0k 0.04% —
73 Man Group plc 0.00% of their portfolio LONDON, X0 31,44331.4k $290.0k $290.0k 0.00% —
74 Dynamic Technology Lab Private Ltd 0.03% of their portfolio SINGAPORE, U0 30,47430.5k $281.0k $281.0k 0.03% —
75 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 28,13728.1k $259.0k $259.0k 0.00% —
76 Schonfeld Strategic Advisors LLC 0.00% of their portfolio NEW YORK, NY 25,60025.6k $236.0k $236.0k 0.00% —
77 ADVISORY RESEARCH INC 0.02% of their portfolio CHICAGO, IL 20,19720.2k $186.0k $186.0k 0.02% —
78 CREDIT SUISSE AG/ 0.00% of their portfolio ZURICH, V8 19,77619.8k $183.0k $183.0k 0.00% —
79 NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio ALBANY, NY 19,73019.7k $182.0k $182.0k 0.00% —
80 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.00% of their portfolio TALLAHASSEE, FL 19,10819.1k $176.0k $176.0k 0.00% —
81 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 18,57018.6k $171.0k $171.0k 0.00% —
82 PEAK6 Investments LLC 0.01% of their portfolio CHICAGO, IL 17,81817.8k $164.0k $164.0k 0.01% —
83 SIMPLEX TRADING, LLC 0.01% of their portfolio CHICAGO, IL 17,24917.2k $159.0k $159.0k 0.01% —
84 MetLife Investment Management, LLC 0.00% of their portfolio Whippany, NJ 16,57216.6k $152.8k $152.8k 0.00% —
85 FLPUTNAM INVESTMENT MANAGEMENT CO 0.01% of their portfolio PORTLAND, ME 16,08016.1k $148.0k $148.0k 0.01% —
86 LEVIN CAPITAL STRATEGIES, L.P. 0.02% of their portfolio NEW YORK, NY 16,00016.0k $148.0k $148.0k 0.02% —
87 XTX Topco Ltd 0.04% of their portfolio LONDON, X0 15,98616.0k $147.0k $147.0k 0.04% —
88 Versor Investments LP 0.01% of their portfolio New York, NY 15,40015.4k $142.0k $142.0k 0.01% —
89 SEI INVESTMENTS CO 0.00% of their portfolio OAKS, PA 14,85714.9k $137.0k $137.0k 0.00% —
90 AMERICAN INTERNATIONAL GROUP, INC. 0.00% of their portfolio New York, NY 14,59814.6k $135.0k $135.0k 0.00% —
91 Mesirow Financial Investment Management, Inc. 0.61% of their portfolio CHICAGO, IL 13,91013.9k $128.0k $128.0k 0.61% —
92 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 12,30012.3k $113.0k $113.0k 0.00% —
93 GROUP ONE TRADING LLC 0.00% of their portfolio CHICAGO, IL 12,22812.2k $113.0k $113.0k 0.00% —
94 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 12,19912.2k $113.0k $113.0k 0.00% —
95 Mirae Asset Global Investments Co., Ltd. 0.00% of their portfolio SEOUL, M5 12,01412.0k $111.0k $111.0k 0.00% —
96 Legal & General Group Plc 0.00% of their portfolio London, X0 11,91811.9k $110.0k $110.0k 0.00% —
97 VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio ATLANTA, GA 11,62511.6k $107.2k $107.2k 0.00% —
98 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio Toronto, A6 11,45411.5k $105.6k $105.6k 0.00% —
99 Mariner, LLC 0.00% of their portfolio Overland Park, KS 10,92210.9k $101.0k $101.0k 0.00% —
100 Abbot Financial Management, Inc. 0.07% of their portfolio ANDOVER, MA 10,82310.8k $100.0k $100.0k 0.07% —