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Joel Greenblatt's Aspen Aerogels, Inc. (ASPN) position

Not anymore: Joel Greenblatt fully exited ASPN in Q3 2025. The position peaked at an amount we cannot price in Q3 2024.
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Value at exit
an amount we cannot price
Shares at exit
10K
Quarter-end price
No quarter-end price available

Average buy price is hidden here because at least one covered purchase quarter has no usable local mean price.

ASPN price vs Greenblatt's position

Dates
$5$5.2$5.4$5.6← Earlier —2 purchases
Average closing price · filing quarter
Price range · filing quarter

Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q3 2025 Exited −10K −100.0% 0 Nov 14, 2025
Q2 2025 New +10K 10K Aug 14, 2025
Q3 2024 New +11K 11K Nov 14, 2024
Data through Q3 2025 · filed Nov 14, 2025
3 grouped rows from 3 quarters

More Greenblatt positions

Common questions

Does Joel Greenblatt own ASPN?

Not currently. Joel Greenblatt fully exited ASPN in Q3 2025, and the complete history is above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Joel Greenblatt buy ASPN?

Joel Greenblatt first disclosed a ASPN position in Q3 2024; every quarterly buy and sell since is in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Joel Greenblatt sell ASPN?

Yes. Joel Greenblatt reduced and then fully exited ASPN by Q3 2025; the reductions are in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of ASPN does Joel Greenblatt own?

None as of the latest filing: Joel Greenblatt has exited ASPN. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Joel Greenblatt pay for ASPN?

Joel Greenblatt began building the ASPN position before our 13F history starts, so an exact average buy price cannot be estimated without understating it. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.