ASPN — ASPEN AEROGELS INC

Ownership history in OPPENHEIMER & CO INC  ·  9 quarters on record

AI Ownership Summary

OPPENHEIMER & CO INC reported ASPEN AEROGELS INC (ASPN) in 9 quarterly 13F filings from 2024 Q1 through 2026 Q1. Peak portfolio weight reached 0.04% in 2024 Q3. The latest visible filing shows ASPN at 0.00% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings.

What this ASPN ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was OPPENHEIMER & CO INC's position in ASPEN AEROGELS INC, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2026 Q1

ASPN was reported at 0.00% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.04% in 2024 Q3

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2024 Q1 to 2026 Q1

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

ASPN stock page OPPENHEIMER & CO INC fund profile OPPENHEIMER & CO INC full holdings
How OPPENHEIMER & CO INC held ASPN — position size vs. price
% of Fund (quarterly)    ASPN price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 9 quarters  ▾
Quarter Action Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 REDUCED 76,284 -737 -1.0% 0.00% $261K 2026-04-24 $3.50
2025 Q4 REDUCED 77,021 -44,805 -36.8% 0.00% $218K 2026-02-02 $3.25
2025 Q3 ADDED 121,826 +102,047 +515.9% 0.01% $848K 2025-11-06 $4.11
2025 Q2 REDUCED 19,779 -183,381 -90.3% 0.00% $117K 2025-07-31 $7.66
2025 Q1 ADDED 203,160 +21,632 +11.9% 0.02% $1.3M 2025-04-23 $5.23
2024 Q4 ADDED 181,528 +78,993 +77.0% 0.03% $2.2M 2025-02-05 $11.28
2024 Q3 ADDED 102,535 +64,154 +167.2% 0.04% $2.8M 2024-11-05 $18.51
2024 Q2 ADDED 38,381 +16,326 +74.0% 0.01% $915K 2024-08-08 $21.46
2024 Q1 INITIATED 22,055 — — 0.01% $388K 2024-05-07 $26.27

🏢 Other funds also holding ASPN

As of 2026 Q1 — sorted by position size

GAGNON SECURITIES LLC 3Y 7Y 1.47% Marex Group plc 0.05% Inspire Investing, LLC 3Y 7Y 0.04% Clarus Group, Inc. 3Y 0.01% First PREMIER Bank 3Y 7Y 0.0% Concurrent Investment Advisors, LLC 0.0% IFP Advisors, Inc 3Y 7Y 0.0% Banque Cantonale Vaudoise 3Y 0.0% Stone House Investment Management, LLC 3Y 7Y 0.0% Sterling Capital Management LLC 3Y 7Y 0.0%

FAQ About OPPENHEIMER & CO INC and ASPN

These are the practical questions this page is built to answer before you even open the full history table.

How long has OPPENHEIMER & CO INC reported owning ASPN?

OPPENHEIMER & CO INC reported ASPN across 9 quarterly 13F filings, from 2024 Q1 through 2026 Q1.

What was the largest reported ASPN position in OPPENHEIMER & CO INC's portfolio?

The largest reported portfolio weight for ASPN was 0.04% in 2024 Q3.

What is the latest reported ASPN position on this page?

The most recent filing on this page is 2026 Q1, when OPPENHEIMER & CO INC reported 76,284 shares, equal to 0.00% of portfolio, with an estimated market value of $261K.

What does the chart on this ASPN ownership page compare?

The chart compares OPPENHEIMER & CO INC's quarterly ASPN portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

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