Brown Matthew Charles

Officer · TENB, ALTR

As of 2026-09-16, Brown Matthew Charles has 28 Form 4 transactions on record across 2 companies — 14 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: $6.3MIndirect: $0$6.3Mas of 2026-09-16
  • Direct $6.3M
  • Indirect $0
TENBdirect174,536 sh$6.3M

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

TENB · 15 trades
2026-08-21: Withheld for tax, 7,400 sh ($254K)2026-08-21: Option exercise, 14,544 sh ($0)2026-08-21: Option exercise, 14,544 sh ($0)2026-05-21: Withheld for tax, 5,219 sh ($131K)2026-05-21: Option exercise, 14,544 sh ($0)2026-05-21: Option exercise, 14,544 sh ($0)2026-05-04: Purchase, 12,000 sh ($258K)2026-02-26: Award / grant, 141,898 sh ($0)2026-02-23: Withheld for tax, 5,269 sh ($92K)2026-02-23: Option exercise, 14,544 sh ($0)2026-02-23: Option exercise, 14,544 sh ($0)2025-11-21: Withheld for tax, 5,278 sh ($138K)2025-11-21: Option exercise, 14,544 sh ($0)2025-11-21: Option exercise, 14,544 sh ($0)2025-08-21: Award / grant, 232,712 sh ($0)
ALTR · 13 trades
2025-03-26: Disposition, 66,125 sh ($7.5M)2025-03-26: Disposition, 45,000 sh ($2.5M)2025-03-26: Disposition, 24,000 sh ($1.6M)2025-03-26: Disposition, 20,625 sh ($986K)2025-03-26: Disposition, 21,563 sh ($732K)2025-03-26: Disposition, 12,000 sh ($615K)2025-03-26: Disposition, 8,000 sh ($401K)2025-03-06: Gift, 2,527 sh ($0)2025-03-03: Sale, 742 sh ($83K)2025-02-26: Sale, 3,811 sh ($425K)2025-02-12: Award / grant, 17,613 sh ($0)2025-01-14: Award / grant, 73 sh ($6K)2024-12-23: Sale, 1,048 sh ($114K)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-05-04TENBPurchase12,000 @ $21.54$258K+64.7% of holding30,541Form 4
2025-03-03ALTRSale742 @ $111.45$83K−1.1% of holding68,652Form 4
2025-02-26ALTRSale3,811 @ $111.53$425K−5.2% of holding69,394Form 4
2024-12-23ALTRSale1,048 @ $108.90$114K−1.9% of holding55,519Form 4
24 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-08-21TENBWithheld for tax7,40047,010Form 4
2026-08-21TENBOption exercise14,544174,536Form 4
2026-08-21TENBOption exercise14,54454,410Form 4
2026-05-21TENBWithheld for tax5,21939,866Form 4
2026-05-21TENBOption exercise14,544189,080Form 4
2026-05-21TENBOption exercise14,54445,085Form 4
2026-02-26TENBAward / grant141,898141,898Form 4
2026-02-23TENBWithheld for tax5,26918,541Form 4
2026-02-23TENBOption exercise14,54423,810Form 4
2026-02-23TENBOption exercise14,544203,624Form 4
2025-11-21TENBWithheld for tax5,2789,266Form 4
2025-11-21TENBOption exercise14,54414,544Form 4
2025-11-21TENBOption exercise14,544218,168Form 4
2025-08-21TENBAward / grant232,712232,712Form 4
2025-03-26ALTRDisposition66,1250Form 4
2025-03-26ALTRDisposition45,0000Form 4
2025-03-26ALTRDisposition24,0000Form 4
2025-03-26ALTRDisposition20,6250Form 4
2025-03-26ALTRDisposition21,5630Form 4
2025-03-26ALTRDisposition12,0000Form 4
2025-03-26ALTRDisposition8,0000Form 4
2025-03-06ALTRGift2,52766,125Form 4
2025-02-12ALTRAward / grant17,61373,205Form 4
2025-01-14ALTRAward / grant7355,592Form 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.