Walker Karin L

Officer · PRTA

As of 2026-09-16, Walker Karin L has 7 Form 4 transactions on record across 1 company — 5 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Reconstructed holdings

Direct: $206KIndirect: $0$206Kas of 2026-09-16
  • Direct $206K
  • Indirect $0
PRTAdirect25,000 sh$206K

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

PRTA · 7 trades
2026-07-28: Disposition, 15,000 sh ($128K)2026-07-28: Option exercise, 15,000 sh ($0)2026-07-28: Option exercise, 15,000 sh2026-07-28: Option exercise, 15,000 sh2026-03-03: Award / grant, 150,000 sh ($0)2025-07-28: Award / grant, 25,000 sh ($0)2025-03-05: Award / grant, 70,000 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
7 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-07-28PRTADisposition15,00010,000Form 4
2026-07-28PRTAOption exercise15,0000Form 4
2026-07-28PRTAOption exercise15,00025,000Form 4
2026-07-28PRTAOption exercise15,00025,000Form 4
2026-03-03PRTAAward / grant150,000150,000Form 4
2025-07-28PRTAAward / grant25,00025,000Form 4
2025-03-05PRTAAward / grant70,00070,000Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.