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Jim Simons's Aspen Aerogels, Inc. (ASPN) position

Not anymore: Jim Simons fully exited ASPN in Q4 2025. The position peaked at an amount we cannot price in Q1 2021.
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Value at exit
an amount we cannot price
Shares at exit
247K
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 Simons's position

1Y 3Y 5Y MAX
Dates
← Earlier —6 purchases, 9 sells44.555.5
Average closing price · filing quarter
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Price range · filing quarter
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Every quarterly change

Every quarterly change
Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Exited· Q4 2025 −247K
Quarter Q4 2025 Δ Own −100.0% Shares held 0 Filing date Feb 12, 2026
Q4 2025 Exited· Q4 2025 −247K – −100.0% 0 Feb 12, 2026
Reduced· Q3 2025 −432K
Quarter Q3 2025 Δ Own −63.6% Shares held 247K Filing date Nov 13, 2025
Q3 2025 Reduced· Q3 2025 −432K – −63.6% 247K Nov 13, 2025
Reduced· Q2 2025 −85K
Quarter Q2 2025 Δ Own −11.1% Shares held 679K Filing date Aug 13, 2025
Q2 2025 Reduced· Q2 2025 −85K – −11.1% 679K Aug 13, 2025
Reduced· Q1 2025 −2K
Quarter Q1 2025 Δ Own −0.3% Shares held 764K Filing date May 14, 2025
Q1 2025 Reduced· Q1 2025 −2K – −0.3% 764K May 14, 2025
Added· Q4 2024 +632K
Quarter Q4 2024 Δ Own +472.4% Shares held 766K Filing date Feb 13, 2025
Q4 2024 Added· Q4 2024 +632K – +472.4% 766K Feb 13, 2025
Reduced· Q3 2024 −216K
Quarter Q3 2024 Δ Own −61.7% Shares held 134K Filing date Nov 13, 2024
Q3 2024 Reduced· Q3 2024 −216K – −61.7% 134K Nov 13, 2024
New· Q2 2024 +350K
Quarter Q2 2024 Shares held 350K Filing date Aug 9, 2024
Q2 2024 New· Q2 2024 +350K – – 350K Aug 9, 2024
Added· Q2 2023 +194K
Quarter Q2 2023 Δ Own +578.8% Shares held 227K Filing date Aug 11, 2023
Q2 2023 Added· Q2 2023 +194K – +578.8% 227K Aug 11, 2023
Reduced· Q1 2023 −89K
Quarter Q1 2023 Δ Own −72.7% Shares held 34K Filing date May 12, 2023
Q1 2023 Reduced· Q1 2023 −89K – −72.7% 34K May 12, 2023
Reduced· Q4 2022 −38K
Quarter Q4 2022 Δ Own −23.4% Shares held 123K Filing date Feb 13, 2023
Q4 2022 Reduced· Q4 2022 −38K – −23.4% 123K Feb 13, 2023
Added· Q3 2022 +82K
Quarter Q3 2022 Δ Own +104.6% Shares held 160K Filing date Nov 14, 2022
Q3 2022 Added· Q3 2022 +82K – +104.6% 160K Nov 14, 2022
Added· Q2 2022 +22K
Quarter Q2 2022 Δ Own +38.1% Shares held 78K Filing date Aug 12, 2022
Q2 2022 Added· Q2 2022 +22K – +38.1% 78K Aug 12, 2022
Added· Q1 2022 +23K
Quarter Q1 2022 Δ Own +66.0% Shares held 57K Filing date May 13, 2022
Q1 2022 Added· Q1 2022 +23K – +66.0% 57K May 13, 2022
Reduced· Q4 2021 −75K
Quarter Q4 2021 Δ Own −68.6% Shares held 34K Filing date Feb 11, 2022
Q4 2021 Reduced· Q4 2021 −75K – −68.6% 34K Feb 11, 2022
Reduced· Q3 2021 −136K
Quarter Q3 2021 Δ Own −55.6% Shares held 109K Filing date Nov 12, 2021
Q3 2021 Reduced· Q3 2021 −136K – −55.6% 109K Nov 12, 2021
Data through Q4 2025 · filed Feb 12, 2026
15 of 17

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Common questions

Does Jim Simons own ASPN?

Not currently. Jim Simons fully exited ASPN in Q4 2025, and the complete history is above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Jim Simons buy ASPN?

Jim Simons held ASPN since at least Q1 2021, when this filing coverage begins; the opening snapshot is not a disclosed purchase. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Jim Simons sell ASPN?

Yes. Jim Simons reduced and then fully exited ASPN by Q4 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 Jim Simons own?

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

What price did Jim Simons pay for ASPN?

Jim Simons 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.