13F Pro

SEC Form 4 reporting owner

Thomas Frank E

Thomas Frank E has filed 4 Form 4 transactions reported between February 27, 2026 and June 23, 2026, as a reporting owner of Spero Therapeutics, Inc. and a reporting owner of Larimar Therapeutics, Inc..

Name as filed: THOMAS FRANK E

Open-market buys, 24 mo
$25K
1 lines
Open-market sales, 24 mo
None
reported
Companies
2
with Form 4 filings
Latest transaction
Jun 23, 2026
transaction date

Roles and reported holdings

  • SPROSpero Therapeutics, Inc.
    Jun 23, 2026

    Reporting owner

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

  • LRMRLarimar Therapeutics, Inc.
    Feb 27, 2026 – May 19, 2026

    Reporting owner

    Held directly7,000 sh as of Feb 27, 2026 · Form 4

    24 months: $25K bought

Transaction history

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

DateCompanyTypeSharesValueFiling
Jun 23, 2026SPROGrant or awardCode A · direct20,000—Form 4
Jun 23, 2026SPROGrant or awardCode A · direct10,000—Form 4
May 19, 2026LRMRGrant or awardCode A · direct55,150—Form 4
Feb 27, 2026LRMROpen-market purchaseCode P · directAlso reported by SHERMAN JEFFREY W5,000$25K@ $5.00Form 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.