13F Pro

SEC Form 4 reporting owner

Mitchell Steven R

Mitchell Steven R has filed 10 Form 4 transactions reported between January 5, 2026 and September 8, 2026, as Director of StepStone Group Inc., Director of ALKAMI TECHNOLOGY, INC. and a reporting owner of ASPEN AEROGELS INC.

Name as filed: Mitchell Steven R

Open-market buys, 24 mo
$566K
3 lines
Open-market sales, 24 mo
None
reported
Companies
3
with Form 4 filings
Latest transaction
Sep 8, 2026
transaction date

Roles and reported holdings

  • STEPStepStone Group Inc.
    Feb 23, 2026 – Sep 8, 2026

    Director

    Held directly12,793 sh as of Feb 23, 2026 · Form 4

    24 months: $566K bought

  • ALKTALKAMI TECHNOLOGY, INC.
    Jan 5, 2026 – Jul 5, 2026

    Director

    No common-stock holding reported on a purchase, sale, gift or withholding line.

  • ASPNASPEN AEROGELS INC
    May 13, 2026

    Reporting owner

    No common-stock holding reported on a purchase, sale, gift or withholding line.

Transaction history

All 10 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Sep 8, 2026STEPDirectorGrant or awardCode A · direct4,828$245K@ $50.74Form 4
Jul 5, 2026ALKTDirectorGrant or awardCode A · direct533—Form 4
May 19, 2026ALKTDirectorGrant or awardCode A · direct11,357—Form 4
May 13, 2026ASPNGrant or awardCode A · direct8,706—Form 4
May 13, 2026ASPNGrant or awardCode A · direct10,370—Form 4
Apr 5, 2026ALKTDirectorGrant or awardCode A · direct524—Form 4
Feb 23, 2026STEPDirectorOpen-market purchaseCode P · direct11,507$508K@ $44.18Form 4
Feb 23, 2026STEPDirectorOpen-market purchaseCode P · direct86$4K@ $44.33Form 4
Feb 23, 2026STEPDirectorOpen-market purchaseCode P · direct1,200$54K@ $44.65Form 4
Jan 5, 2026ALKTDirectorGrant or awardCode A · direct396—Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.