No AI summary for this filing type
View Full Filing (SEC EDGAR)Aspen Aerogels Inc
$5.19-3.9%
+$44.0M
Net Activity
+6.67% total shares
Institutions Holding
183
Popularity Rank
#3231
Avg Weight
0.10%
Total Value
$473.6M
Market Cap
$427.3M
183 institutions currently hold ASPN, with 106 net buyers and 70 net sellers this quarter.
Institutional Moves (Q2 2026)
Majority Increased
Based on recent trading activity
Net Selling Institutions
70
Net Buying Institutions
106
Top 5 by Value
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Across its top 20 institutional holders, ASPN's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 17/100, avg. turnover score 41/100).
ASPN ranks #3231 out of 37696 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
ASPN is a top-conviction position for Kim, LLC — at 7.8% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.
Wealth Enhancement Advisory Services, LLC has added to its ASPN position for two straight quarters, increasing it by $185.1K to reach $225.8K today.
Essential Partners LLC has trimmed its ASPN position for two straight quarters, cutting it by $16.5K while still holding $6.5K.
ASPN is down 3.9% today, but institutions show net buying of $44.0M this quarter — a divergence between today's price move and the underlying institutional flow.
ASPN reported a net loss of $126.2M over the trailing twelve months.
+$91.2M
Total Buy Value
$36.1M
Total Sell Value
106
Net Buyers
70
Net Sellers
ASPN
Q2 2026
Top 5 Institutional Movers
ASPN does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.
13F data as of 2026-09-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
1
Filings (90d)
$35K
Total Est. Value
6K shares
Planned Shares
| Filer | Filing Date | Est. Value |
|---|---|---|
| SANTHOSH P DANIEL | 2026-08-10 | $35K |
Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。
0
Active 5%+ Holders
| Reporting Person | Type | Filing Date | % of Class |
|---|---|---|---|
| Wood River Capital, LLC | 13D/A | 2026-09-24 | 0.0% |
| Needham Investment Management L.L.C. | 13G/A | 2026-08-13 | 3.9% |
2
Filings (14d)
No AI summary for this filing type
View Full Filing (SEC EDGAR)AI summary pending
View Full Filing (SEC EDGAR)04523Y105
The most-added stocks by 13F institutions this quarter
Institutions Holding
6,278
Total reported value
$2.2T
3254 13F institutions increased their position this quarter
Institutions Holding
6,025
Total reported value
$3.6T
3054 13F institutions increased their position this quarter
Institutions Holding
6,188
Total reported value
$1.8T
2995 13F institutions increased their position this quarter
The most widely held stocks tracked across all 13F institutions
Institutions Holding
4,868
Total reported value
$1.5T
Held by 4868 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,789
Total reported value
$1.2T
Held by 4789 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,716
Total reported value
$473.6B
Held by 4716 institutions — one of the most-tracked stocks on AlphaSMO
Access ASPN's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/ASPNCLI
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