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Public ownership evidence

Aspen Aerogels, Inc. (ASPN) Ownership Disclosures

Read ASPN insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-11-07T14:03:26.246Z

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2026-11-062026-11-04Nieuwoudt Stacy DurbinA6,073Not reported

First displayed source row from Recent Form 4 activity. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-11-04 and its public availability date is 2026-11-06. Subtracting those calendar dates gives 2 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code A: a award. An award is an acquisition but is not an open-market purchase. A purchase-following rule must not count it as code P.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC 0001843185-26-000008 ↗SEC 0001843185-26-000008 ↗SEC 0001193125-26-401380 ↗

Recent Form 4 activity

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2026-11-062026-11-04Nieuwoudt Stacy DurbinA6,073Not reported
2026-11-062026-11-04Nieuwoudt Stacy DurbinA5,100Not reported
2026-09-252026-09-23Koch, Inc., Wood River Capital, LLCS12,280,426Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

Inspect all 50 displayed rows: Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25929$5,890None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-255,890$929,000None
MERCER GLOBAL ADVISORS INC /ADV2026-06-302026-08-2038,679$245,225None
Equitable Holdings, Inc.2026-06-302026-08-1813,830$87,682None
Jefferies Financial Group Inc.2026-06-302026-08-18126,303$800,761None
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO2026-06-302026-08-18128,107$812,198None
Odyssean, LLC2026-06-302026-08-1541,759$264,752None
STANCE CAPITAL LLC2026-06-302026-08-15811$5,142None
Graham Capital Management, L.P.2026-06-302026-08-1546,267$293,333None
JPL Wealth Management, LLC2026-06-302026-08-1523$146None
Basecamp Wealth Advisors LLC2026-06-302026-08-15225$1,427None
XTX Topco Ltd2026-06-302026-08-15227,977$1,445,374None
Aquatic Capital Management LLC2026-06-302026-08-1516,403$103,995None
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2026-06-302026-08-15570,712$3,618,314None
Sixth Street Partners Management Company, L.P.2026-06-302026-08-15570,712$3,618,314None
OSAIC HOLDINGS, INC.2026-06-302026-08-159,588$60,780None
Squarepoint Ops LLC2026-06-302026-08-1516,460$104,356None
Man Group plc2026-06-302026-08-1590,259$572,242None
Trexquant Investment LP2026-06-302026-08-15302,439$1,917,463None
MetLife Investment Management, LLC2026-06-302026-08-1540,269$255,305None
JANE STREET GROUP, LLC2026-06-302026-08-1532,600$206,684Put
JANE STREET GROUP, LLC2026-06-302026-08-15169,500$1,074,630Call
Legal & General Group Plc2026-06-302026-08-156,915$43,876None
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15143,700$911,058Call
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-1548,800$309,392Put
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15177,419$1,124,836None
Firsthand Capital Management, Inc.2026-06-302026-08-15125,000$792,500None
IRONWOOD INVESTMENT MANAGEMENT LLC2026-06-302026-08-15179,301$1,136,768None
MILLENNIUM MANAGEMENT LLC2026-06-302026-08-151,190,616$7,548,505None
Palogic Value Management, L.P.2026-06-302026-08-15185,589$1,176,634None
Balyasny Asset Management L.P.2026-06-302026-08-1543,717$277,166None
JONES FINANCIAL COMPANIES LLLP2026-06-302026-08-151,500$8,445None
AMERIPRISE FINANCIAL INC2026-06-302026-08-152,107$13,358None
AMERIPRISE FINANCIAL INC2026-06-302026-08-151,819,188$11,533,652None
Cerity Partners LLC2026-06-302026-08-1516,534$104,825None
Cerity Partners LLC2026-06-302026-08-1511,831$75,009None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-156,600$41,844None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-1590$571None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-152,306$14,620None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-151,221,187$7,742,326None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-15191$1,211None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-1545,204$286,593None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-15701$4,444None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-1521$133None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-1546$292None
MANUFACTURERS LIFE INSURANCE COMPANY, THE2026-06-302026-08-1519,056$120,815None
ROYAL BANK OF CANADA2026-06-302026-08-151,097$7,000None
ROYAL BANK OF CANADA2026-06-302026-08-152,061$13,000None
ALLIANCEBERNSTEIN L.P.2026-06-302026-08-1574,130$253,525None
BRIDGEWAY CAPITAL MANAGEMENT, LLC2026-06-302026-08-15110,000$697,400None

90-day public filing window, up to 50 source positions.

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗MERCER GLOBAL ADVISORS INC /ADV ↗Equitable Holdings, Inc. ↗Jefferies Financial Group Inc. ↗PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO ↗Odyssean, LLC ↗STANCE CAPITAL LLC ↗Graham Capital Management, L.P. ↗JPL Wealth Management, LLC ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.