13F Pro

SEC Form 4 reporting owner

Sayiner Necip

Sayiner Necip has filed 8 Form 4 transactions reported between December 3, 2025 and June 3, 2026, as a reporting owner of RAMBUS INC, a reporting owner of AXCELIS TECHNOLOGIES INC, Director of TERADYNE, INC and Director of Sandisk Corp.

Name as filed: Sayiner Necip

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$3.5M
5 lines
Companies
4
with Form 4 filings
Latest transaction
Jun 3, 2026
transaction date

Roles and reported holdings

  • RMBSRAMBUS INC
    Apr 1, 2026 – Jun 3, 2026

    Reporting owner

    Held directly18,223 sh as of Jun 3, 2026 · Form 4

    24 months: $2.1M sold

  • ACLSAXCELIS TECHNOLOGIES INC
    May 15, 2026 – Jun 3, 2026

    Reporting owner

    Held directly7,112 sh as of Jun 3, 2026 · Form 4

    24 months: $250K sold

  • TERTERADYNE, INC
    May 8, 2026

    Director

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

  • SNDKSandisk Corp
    Dec 3, 2025 – May 8, 2026

    Director

    Held directly2,900 sh as of May 8, 2026 · Form 4

    24 months: $1.1M sold

Transaction history

All 8 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Jun 3, 2026RMBSOpen-market saleCode S · direct5,000$851K@ $170.15Form 4
Jun 3, 2026ACLSOpen-market saleCode S · direct1,586$250K@ $157.44Form 4
May 15, 2026ACLSGrant or awardCode A · direct1,440—Form 4
May 8, 2026RMBSOpen-market saleCode S · direct9,824$1.3M@ $130.18Form 4
May 8, 2026TERDirectorGrant or awardCode A · direct668—Form 4
May 8, 2026SNDKDirectorOpen-market saleCode S · direct579$870K@ $1503.11Form 4
Apr 1, 2026RMBSGrant or awardCode A · direct2,223—Form 4
Dec 3, 2025SNDKDirectorOpen-market saleCode S · direct1,271$248K@ $195.14Form 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.