# ASPEN AEROGELS INC COM

ASPEN AEROGELS INC COM is a security (CUSIP 04523Y105) tracked across SEC portfolio filings. 172 institutional managers reported $229.8M on Form 13F as of 2026-06-30; 14 registered fund positions totaling $9.3M via N-PORT as of 2026-05-31.

## Summary

- Issuer: ASPEN AEROGELS INC
- Class: COM
- CUSIP: 04523Y105
- Asset category: EC
- 13F holders: 172
- 13F value: $229.8M
- 13F period: 2026-06-30
- N-PORT fund positions: 14
- N-PORT value: $9.3M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 172 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| KIM, LLC | WICHITA, KS | $42.0M | 12,280,426 |
| [OAKTOP CAPITAL MANAGEMENT II, L.P.](https://search.stillhousedata.com/firm/161896) | Chatham, NJ | $17.7M | 5,168,674 |
| BlackRock, Inc. | New York, NY | $16.2M | 4,743,076 |
| [NEEDHAM INVESTMENT MANAGEMENT LLC](https://search.stillhousedata.com/firm/106783) | NEW YORK, NY | $15.5M | 4,518,775 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $13.3M | 4,685,950 |
| George Kaiser Family Foundation | TULSA, OK | $10.8M | 3,167,322 |
| [GAGNON SECURITIES LLC](https://search.stillhousedata.com/firm/103727) | New York, NY | $9.7M | 1,535,812 |
| STATE STREET CORP | BOSTON, MA | $7.9M | 2,320,727 |
| [RICE HALL JAMES & ASSOCIATES, LLC](https://search.stillhousedata.com/firm/125410) | San Diego, CA | $5.3M | 1,552,628 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $5.3M | 1,540,771 |
| MILLENNIUM MANAGEMENT LLC | NEW YORK, NY | $4.8M | 1,404,675 |
| [MARSHALL WACE, LLP](https://search.stillhousedata.com/firm/160885) | LONDON, X0 | $4.3M | 1,263,102 |
| DIMENSIONAL FUND ADVISORS LP | AUSTIN, TX | $4.3M | 1,256,480 |
| AMERICAN CENTURY COMPANIES INC | KANSAS CITY, MO | $4.3M | 1,247,783 |
| JACOBS LEVY EQUITY MANAGEMENT, INC | FLORHAM PARK, NJ | $4.2M | 1,218,779 |

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [Needham Growth Fund](https://search.stillhousedata.com/fund/S000003649) | Needham Funds Inc | $2.9M | 156.16% |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $2.7M | 0.33% |
| [VANGUARD RUSSELL 2000 INDEX FUND](https://search.stillhousedata.com/fund/S000030003) | VANGUARD SCOTTSDALE FUNDS | $2.2M | 1.24% |
| [Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF](https://search.stillhousedata.com/fund/S000048296) | Goldman Sachs ETF Trust | $364K | 3.69% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $364K | 0.75% |
| [Firsthand Technology Opportunities Fund](https://search.stillhousedata.com/fund/S000011681) | Firsthand Funds | $308K | 74.56% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $178K | 0.03% |
| [U.S. MICRO CAP PORTFOLIO](https://search.stillhousedata.com/fund/S000000948) | DFA INVESTMENT DIMENSIONS GROUP INC | $162K | 0.22% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $143K | 0.05% |
| [DWS Small Cap Index VIP](https://search.stillhousedata.com/fund/S000006223) | DEUTSCHE DWS INVESTMENTS VIT FUNDS | $31K | 0.74% |
| [NexPoint Climate Tech Fund](https://search.stillhousedata.com/fund/S000001623) | NexPoint Funds II | $18K | 30.95% |
| [TIAA Separate Account VA-1 - Stock Index Account](https://search.stillhousedata.com/fund/S000005098) | TIAA Separate Account VA-1 | $7K | 0.05% |
| Guggenheim Active Allocation Fund | Guggenheim Active Allocation Fund | $2K | 0.03% |
| [Blackstone Alternative Multi-Strategy Fund](https://search.stillhousedata.com/fund/S000045538) | Blackstone Alternative Investment Funds | $1K | 0.00% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/04523y105.md)
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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.