LEIGHTON F THOMSON

Director · Officer · AKAM

As of 2026-09-16, LEIGHTON F THOMSON has 48 Form 4 transactions on record across 1 company — 22 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: $11.4MIndirect: $253.9M$265.3Mas of 2026-09-16
  • Direct $11.4M
  • Indirect $253.9M
AKAMindirect2,430,291 sh$253.9M
AKAMdirect109,267 sh$11.4M

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

AKAM · 48 trades
2026-03-06: Withheld for tax, 11,292 sh ($1.1M)2026-03-06: Option exercise, 23,353 sh ($0)2026-03-06: Option exercise, 23,353 sh2026-03-06: Option exercise, 23,353 sh2026-03-04: Withheld for tax, 9,822 sh ($1.0M)2026-03-04: Option exercise, 20,314 sh ($0)2026-03-04: Option exercise, 20,314 sh2026-03-04: Option exercise, 20,314 sh2026-03-03: Withheld for tax, 14,490 sh ($1.4M)2026-03-03: Option exercise, 28,333 sh ($0)2026-03-03: Option exercise, 28,333 sh2026-03-03: Option exercise, 28,333 sh2026-03-02: Award / grant, 74,252 sh ($0)2026-02-20: Withheld for tax, 11,650 sh ($1.1M)2026-02-20: Award / grant, 24,094 sh ($0)2026-02-19: Withheld for tax, 15,261 sh ($1.7M)2026-02-19: Award / grant, 12,520 sh ($0)2026-02-19: Option exercise, 36,101 sh ($0)2026-02-19: Award / grant, 14,396 sh ($0)2026-02-19: Award / grant, 17,464 sh ($0)2026-02-19: Option exercise, 36,101 sh2026-02-19: Option exercise, 36,101 sh2025-08-11: Purchase, 47,924 sh ($3.5M)2025-08-11: Purchase, 2,076 sh ($148K)2025-03-07: Withheld for tax, 5,756 sh ($477K)2025-03-07: Option exercise, 11,904 sh ($0)2025-03-07: Option exercise, 11,904 sh2025-03-07: Option exercise, 11,904 sh2025-03-06: Withheld for tax, 11,291 sh ($935K)2025-03-06: Option exercise, 23,352 sh ($0)2025-03-06: Option exercise, 23,352 sh ($0)2025-03-04: Withheld for tax, 10,227 sh ($828K)2025-03-04: Option exercise, 20,313 sh ($0)2025-03-04: Option exercise, 20,313 sh ($0)2025-03-03: Award / grant, 85,000 sh ($0)2025-03-03: Award / grant, 51,000 sh ($0)2025-03-03: Award / grant, 34,000 sh ($0)2025-03-03: Gift, 37,670 sh ($0)2025-02-27: Purchase, 35,470 sh ($2.8M)2025-02-27: Purchase, 2,200 sh ($176K)2025-02-21: Withheld for tax, 6,859 sh ($526K)2025-02-21: Award / grant, 14,186 sh ($0)2025-02-19: Withheld for tax, 14,200 sh ($1.4M)2025-02-19: Withheld for tax, 2,418 sh ($240K)2025-02-19: Option exercise, 4,999 sh ($0)2025-02-19: Option exercise, 34,400 sh ($0)2025-02-19: Option exercise, 34,400 sh ($0)2025-02-19: Option exercise, 4,999 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2025-08-11AKAMPurchase47,924 @ $72.30$3.5M+2.0% of holding2,430,291Form 4
2025-08-11AKAMPurchase2,076 @ $71.33$148K+0.1% of holding2,382,367Form 4
2025-02-27AKAMPurchase35,470 @ $79.56$2.8M+35.6% of holding135,142Form 4
2025-02-27AKAMPurchase2,200 @ $80.01$176K+1.6% of holding137,342Form 4
44 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-03-06AKAMWithheld for tax11,29297,975Form 4
2026-03-06AKAMOption exercise23,3530Form 4
2026-03-06AKAMOption exercise23,353109,267Form 4
2026-03-06AKAMOption exercise23,353109,267Form 4
2026-03-04AKAMWithheld for tax9,82285,914Form 4
2026-03-04AKAMOption exercise20,31420,315Form 4
2026-03-04AKAMOption exercise20,31495,736Form 4
2026-03-04AKAMOption exercise20,31495,736Form 4
2026-03-03AKAMWithheld for tax14,49075,422Form 4
2026-03-03AKAMOption exercise28,33356,667Form 4
2026-03-03AKAMOption exercise28,33389,912Form 4
2026-03-03AKAMOption exercise28,33389,912Form 4
2026-03-02AKAMAward / grant74,25274,252Form 4
2026-02-20AKAMWithheld for tax11,65061,579Form 4
2026-02-20AKAMAward / grant24,09473,229Form 4
2026-02-19AKAMWithheld for tax15,26149,135Form 4
2026-02-19AKAMAward / grant12,52019,060Form 4
2026-02-19AKAMOption exercise36,1010Form 4
2026-02-19AKAMAward / grant14,39636,101Form 4
2026-02-19AKAMAward / grant17,46417,464Form 4
2026-02-19AKAMOption exercise36,10164,396Form 4
2026-02-19AKAMOption exercise36,10164,396Form 4
2025-03-07AKAMWithheld for tax5,756127,967Form 4
2025-03-07AKAMOption exercise11,9040Form 4
2025-03-07AKAMOption exercise11,904133,723Form 4
2025-03-07AKAMOption exercise11,904133,723Form 4
2025-03-06AKAMWithheld for tax11,291121,819Form 4
2025-03-06AKAMOption exercise23,352133,110Form 4
2025-03-06AKAMOption exercise23,35223,353Form 4
2025-03-04AKAMWithheld for tax10,227109,758Form 4
2025-03-04AKAMOption exercise20,313119,985Form 4
2025-03-04AKAMOption exercise20,31340,629Form 4
2025-03-03AKAMAward / grant85,00085,000Form 4
2025-03-03AKAMAward / grant51,00051,000Form 4
2025-03-03AKAMAward / grant34,00034,000Form 4
2025-03-03AKAMGift37,67099,672Form 4
2025-02-21AKAMWithheld for tax6,85999,672Form 4
2025-02-21AKAMAward / grant14,186106,531Form 4
2025-02-19AKAMWithheld for tax14,20092,345Form 4
2025-02-19AKAMWithheld for tax2,41872,145Form 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.