13F Pro

SEC Form 4 reporting owner

Amron Arthur H

Amron Arthur H has filed 13 Form 4 transactions reported between December 11, 2025 and September 14, 2026, as Director of NEPHROS INC and Director of MAMMOTH ENERGY SERVICES, INC..

Name as filed: Amron Arthur H

Open-market buys, 24 mo
$51K
5 lines
Open-market sales, 24 mo
None
reported
Companies
2
with Form 4 filings
Latest transaction
Sep 14, 2026
transaction date

Roles and reported holdings

  • NEPHNEPHROS INC
    Mar 16, 2026 – Sep 14, 2026

    Director

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

  • TUSKMAMMOTH ENERGY SERVICES, INC.
    Dec 11, 2025 – Jun 17, 2026

    Director

    Held directly67,135 sh as of Jun 12, 2026 · Form 4

    24 months: $51K bought

Transaction history

All 13 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Sep 14, 2026NEPHDirectorOther acquisition or dispositionCode J · indirect22,710$90K@ $3.95Form 4
Sep 14, 2026NEPHDirectorOther acquisition or dispositionCode J · indirect2,836—Form 4
Sep 14, 2026NEPHDirectorOther acquisition or dispositionCode J · direct17,749—Form 4
Aug 12, 2026NEPHDirectorGrant or awardCode A · direct2,418—Form 4
Jun 17, 2026TUSKDirectorOther acquisition or dispositionCode J · indirect10,329—Form 4
Jun 17, 2026TUSKDirectorOther acquisition or dispositionCode J · direct19,121—Form 4
Jun 12, 2026TUSKDirectorOpen-market purchaseCode P · direct2,000$7K@ $3.28Form 4
Jun 11, 2026TUSKDirectorOpen-market purchaseCode P · direct2,500$8K@ $3.22Form 4
May 28, 2026TUSKDirectorOpen-market purchaseCode P · direct3,000$10K@ $3.25Form 4
May 26, 2026TUSKDirectorOpen-market purchaseCode P · direct2,500$8K@ $3.24Form 4
May 11, 2026NEPHDirectorGrant or awardCode A · direct3,574—Form 4
Mar 16, 2026NEPHDirectorGrant or awardCode A · direct3,610—Form 4
Dec 11, 2025TUSKDirectorOpen-market purchaseCode P · direct10,000$19K@ $1.89Form 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.