Porteous William

Director · SPIR

As of 2026-09-16, Porteous William has 9 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: $1.5MIndirect: $0$1.5Mas of 2026-09-16
  • Direct $1.5M
  • Indirect $0
SPIRdirect129,019 sh$1.5M

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

SPIR · 9 trades
2026-07-01: Award / grant, 1,516 sh ($28K)2026-05-28: Award / grant, 7,261 sh ($0)2026-04-01: Award / grant, 1,896 sh ($25K)2026-01-02: Award / grant, 3,249 sh ($25K)2025-10-01: Award / grant, 2,136 sh ($24K)2025-07-01: Award / grant, 2,065 sh ($23K)2025-06-05: Award / grant, 15,909 sh ($0)2025-04-01: Award / grant, 2,880 sh ($23K)2025-01-02: Award / grant, 1,578 sh ($23K)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
9 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-07-01SPIRAward / grant1,516129,019Form 4
2026-05-28SPIRAward / grant7,261127,503Form 4
2026-04-01SPIRAward / grant1,896120,242Form 4
2026-01-02SPIRAward / grant3,249118,346Form 4
2025-10-01SPIRAward / grant2,136115,097Form 4
2025-07-01SPIRAward / grant2,065112,961Form 4
2025-06-05SPIRAward / grant15,909110,896Form 4
2025-04-01SPIRAward / grant2,88094,987Form 4
2025-01-02SPIRAward / grant1,57892,107Form 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.