Aspen Aerogels Inc (ASPN): Hedge Fund Ownership & Smart Money Signals (Q1 2026)

Q: Is it too late to buy Aspen Aerogels Inc (ASPN) following the 2026 Q1 hedge fund 13F filings?

As of today, ASPN has moved +12.9% since the 2026 Q1 13F filing date (May 15, 2026), compared to +5.5% for the XLI sector ETF — an outperformance of +7.4%. Since the quarter end (March 31, 2026), ASPN gained +84.8% vs +11.9% for XLI. The stock is tracking its sector benchmark closely. The signal remains fresh and the entry point is still near the fund's implied reference.

Aspen Aerogels Inc (ASPN)

167 + Investors. Track Smart Money conviction in ASPN. See who's accumulating, reducing, or initiating positions.

Smart Money Signals — ASPN

Based on 168 hedge funds · latest filing: 2026 Q1 · updated quarterly

📉

Selling streak — 2 quarters in a row

last 6Q

For 2 consecutive quarters, more hedge funds reduced or closed their ASPN positions than added to them. Sustained institutional selling is a meaningful warning sign — these are professionals with deep research teams collectively deciding to exit.

📊

High ownership — 71% of 3.0Y peak

71% of all-time peak

168 funds currently hold this stock — 71% of the 3.0-year high of 238 funds (reached 2024 Q3). Ownership is elevated but not yet at maximum concentration. Room to grow, but watch if the trend reverses.

📉

Outflows — 24% fewer funds vs a year ago

fund count last 6Q

52 fewer hedge funds hold ASPN compared to a year ago (-24% decline). When institutions consistently reduce their exposure, it's worth exploring the underlying fundamental reasons driving them away.

🟠

More sellers than buyers — 43% buying

82 buying108 selling

Last quarter: 108 funds reduced or exited vs 82 that bought or added. When more than half of active funds are selling, it's a caution flag — especially if the stock price hasn't moved down yet.

⚠️

Fewer new buyers each quarter (-8 vs last Q)

new funds entering per quarter

Funds opening this position for the first time: 26 → 48 → 44 → 36. Each quarter fewer new institutions are entering. This usually means most funds that wanted in are already in — the stock is well-known but the pool of potential new buyers is shrinking.

🔒

56% of holders stayed for 2+ years

■ 56% conviction (2yr+) ■ 23% medium ■ 21% new

94 out of 168 hedge funds have held ASPN for over 2 years without selling. Long-term investors are generally harder to shake out during market stress, creating a stable ownership base that limits the risk of sudden capitulation.

💰

Price up while funds trimmed (+16% value, -4% shares)

Value

+16%

-3%

Last quarter: total value of institutional ASPN holdings rose +16% even though funds reduced share count by 4%. The stock price increased enough to offset the selling. Institutions are quietly trimming into price strength — watch for rotation.

➡️

Steady discovery — ~36 new funds/quarter

41 → 26 → 48 → 44 → 36 new funds/Q

New funds entering each quarter: 26 → 48 → 44 → 36. Consistent flow of new institutional buyers without clear acceleration or slowdown.

🏛️

Veteran-anchored — 63% veterans vs 21% newcomers

■ 63% veterans ■ 17% 1-2yr ■ 21% new

Entry-cohort mix of 175 holders: 110 (63%) are 2+ year veterans, 29 entered 1–2 years ago, and 36 (21%) joined within the past year. A veteran-weighted cap table skews toward institutional memory over fresh momentum.

✅

Strong quality — 27% AUM from major funds

27% from top-100 AUM funds

41 of 166 holders rank in the top 100 by AUM, accounting for 27% of total institutional value held. A meaningful share of the ownership value comes from the most well-resourced institutions.

2.4

out of 10

Low Exit Risk

Exit risk score 2.4/10 — low institutional crowding. Ownership is below peak levels, holder base is relatively sticky, and buying momentum is positive.

Methodology note: these Smart Money cards use consecutive 13F disclosure snapshots, not trade-by-trade execution data. "Buying", "selling", "new holders", and "trimmed" refer to quarter-over-quarter changes in reported holders, aggregate shares, or disclosed position values between filings. They are useful for ownership regime analysis and crowding, but they do not imply exact trade timing on the filing date.

Metric	All 13F Filers (2026 Q1)	Prior (2025 Q4)	Change
Funds Holding	167	182	-8.24%
13F Shares	69M	72M	-3.72%
Total Value	$237M	$204M	16.43%
New Positions	35	44	-9
Increased Positions	42	45	-3
Closed Positions	50	66	-16
Reduced Positions	58	61	-3
Total Calls	5	8	-37.5%
Total Puts	4	3	33.33%
PUT/CALL Ratio	0.8	0.38	Neutral

Metric

All 13F Filers (2026 Q1)

Prior (2025 Q4)

Change

Funds Holding

167

182

-8.24%

13F Shares

69M

72M

-3.72%

Total Value

$237M

$204M

16.43%

New Positions

-9

Increased Positions

-3

Closed Positions

-16

Reduced Positions

-3

Total Calls

-37.5%

Total Puts

33.33%

PUT/CALL Ratio

0.8

0.38

Neutral

Institutional Holders (2026 Q1)

167 + investors

Explore institutional interest and hedge fund ownership dynamics. Analyze portfolio weights, new positions, and conviction trends in ASPN. Verified SEC 13F-HR filings.

QUARTER:

FILTER:All New Added To Reduced No Change | Overweight >5%

Top 25 ASPN holders by conviction (% of portfolio weight) — 2026 Q1 · Source: SEC Form 13F
#	Investor	% of Portfolio	Shares	Mkt Value
1	Kim, LLC	4.30%	12,280,426	$42.0M
2	Gagnon Securities LLC	1.47%	1,861,851	$6.4M
3	Oaktop Capital Management II, L.P.	1.32%	5,168,674	$17.7M
4	George Kaiser Family Foundation	1.23%	3,167,322	$10.8M
5	Samjo Management, LLC	0.95%	645,625	$2.2M
6	Firsthand Capital Management, Inc.	0.91%	125,000	$428K
7	Needham Investment Management LLC	0.79%	4,518,775	$15.5M
8	Palogic Value Management, L.P.	0.65%	450,000	$1.5M
9	Telemark Asset Management, LLC	0.32%	1,000,000	$3.4M
10	Rice Hall James & Associates, LLC	0.30%	1,552,628	$5.3M
11	Ironwood Investment Management LLC	0.24%	166,646	$570K
12	WJ Financial Advisors LLC	0.18%	63,945	$219K
13	EntryPoint Capital, LLC	0.15%	146,673	$502K
14	nVerses Capital, LLC	0.13%	40,546	$139K
15	Dynamic Technology Lab Private Ltd	0.07%	121,694	$416K
16	Sargent Investment Group, LLC	0.05%	116,457	$398K
17	Odyssean, LLC	0.05%	41,759	$143K
18	Inspire Investing, LLC	0.04%	151,004	$516K
19	Royce & Associates LP	0.03%	986,513	$3.4M
20	Numerai GP LLC	0.03%	95,900	$328K
21	RBF Capital, LLC	0.02%	100,000	$342K
22	Nebula Research & Development LLC	0.02%	35,414	$210K
23	Jacobs Levy Equity Management, Inc	0.02%	1,218,779	$4.2M
24	Clarus Group, Inc.	0.01%	10,504	$36K
25	XTX Topco Ltd	0.01%	201,367	$689K

Investor	Ownership History	% of Portfolio	Prev %	Rank	Conviction	Avg Buy Price	13F Score™ 3Y / 7Y	Sell Timing	Shares	Mkt Value	Change	Change %	Source	Quarter	Filed

Frequently Asked Questions — Aspen Aerogels Inc (ASPN)

What does the Smart Money Trend signal show for ASPN?

Selling streak — 2 quarters in a row: For 2 consecutive quarters, more hedge funds reduced or closed their ASPN positions than added to them. Sustained institutional selling is a meaningful warning sign — these are professionals with deep research teams collectively deciding to exit.

What is the institutional breadth score for ASPN?

More sellers than buyers — 43% buying: Last quarter: 108 funds reduced or exited vs 82 that bought or added. When more than half of active funds are selling, it's a caution flag — especially if the stock price hasn't moved down yet.

What is the fund quality score for ASPN holders?

Strong quality — 27% AUM from major funds: 41 of 166 holders rank in the top 100 by AUM, accounting for 27% of total institutional value held. A meaningful share of the ownership value comes from the most well-resourced institutions.

How long have hedge funds held ASPN?

56% of holders stayed for 2+ years: 94 out of 168 hedge funds have held ASPN for over 2 years without selling. Long-term investors are generally harder to shake out during market stress, creating a stable ownership base that limits the risk of sudden capitulation.

Is it too late to buy Aspen Aerogels Inc (ASPN) following the 2026 Q1 hedge fund 13F filings?

As of today, ASPN has moved +12.9% since the 2026 Q1 13F filing date (May 15, 2026), compared to +5.5% for the XLI sector ETF — an outperformance of +7.4%. Since the quarter end (March 31, 2026), ASPN has gained +84.8% vs +11.9% for XLI. The stock is tracking its sector benchmark closely. The signal remains fresh and the entry point is still near the fund's implied reference.

Where does this institutional ownership data come from?

All holdings data is sourced from SEC Form 13F filings, which institutional investment managers with over $100 million in assets are required to submit quarterly. Data is parsed directly from SEC EDGAR.

Market Cap	--
Enterprise Value	--
Trailing P/E	--
Forward P/E	--
PEG Ratio (5yr expected)	--
Price/Sales (ttm)	--
Price/Book (mrq)	--
Enterprise Value/Revenue	--
Enterprise Value/EBITDA	--
Beta (5Y Monthly)	--
Short Ratio (Days to Cover)	--
Short % of Float	--

Profit Margin	--
Return on Assets (ttm)	--
Return on Equity (ttm)	--

Revenue (ttm)	--
Net Income Avi to Common (ttm)	--
Diluted EPS (ttm)	--
Total Cash (mrq)	--
Total Debt/Equity (mrq)	--
Levered Free Cash Flow (ttm)	--

Aspen Aerogels Inc (ASPN)

Smart Money Signals — ASPN

Selling streak — 2 quarters in a row

High ownership — 71% of 3.0Y peak

Outflows — 24% fewer funds vs a year ago

More sellers than buyers — 43% buying

Fewer new buyers each quarter (-8 vs last Q)

56% of holders stayed for 2+ years

Price up while funds trimmed (+16% value, -4% shares)

Steady discovery — ~36 new funds/quarter

Veteran-anchored — 63% veterans vs 21% newcomers

Strong quality — 27% AUM from major funds

Institutional Sentiment Summary — ASPN

Hedge Fund Ownership: ASPN

Market Analysis: ASPN

Analyst Price Targets

Analyst Recommendations

Stock Performance

Company Profile: ASPN

Is It Too Late to Buy Aspen Aerogels Inc (ASPN) Based on Hedge Fund 13F Filings?

Hedge Fund Positioning: ASPN

Statistics: ASPN

Valuation Measures Data as of: --

Financial Highlights

Institutional Holders (2026 Q1)

Frequently Asked Questions — Aspen Aerogels Inc (ASPN)

Welcome to 13Foresight!