Niderno Allison G

Officer · HIG

As of 2026-09-16, Niderno Allison G has 16 Form 4 transactions on record across 1 company — 9 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: $84KIndirect: $0$84Kas of 2026-09-16
  • Direct $84K
  • Indirect $0
HIGdirect625 sh$84K

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

HIG · 16 trades
2026-04-06: Withheld for tax, 3 sh ($409)2026-03-04: Sale, 702 sh ($99K)2026-03-02: Withheld for tax, 621 sh ($87K)2026-02-26: Sale, 375 sh ($53K)2026-02-24: Award / grant, 551 sh ($77K)2026-02-18: Withheld for tax, 401 sh ($58K)2026-02-17: Award / grant, 776 sh ($0)2026-02-17: Option exercise, 776 sh ($0)2026-02-17: Option exercise, 776 sh ($0)2025-04-28: Sale, 1,086 sh ($130K)2025-02-26: Withheld for tax, 351 sh ($39K)2025-02-25: Award / grant, 666 sh ($77K)2025-02-21: Withheld for tax, 227 sh ($26K)2025-02-18: Option exercise, 619 sh ($0)2025-02-18: Award / grant, 619 sh ($0)2025-02-18: Option exercise, 619 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-03-04HIGSale702 @ $140.51$99K−53.0% of holding622Form 4
2026-02-26HIGSale375 @ $141.97$53K−37.6% of holding622Form 4
2025-04-28HIGSale1,086 @ $119.42$130K−63.6% of holding622Form 4
13 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-04-06HIGWithheld for tax3625Form 4
2026-03-02HIGWithheld for tax6211,324Form 4
2026-02-24HIGAward / grant5513,248Form 4
2026-02-18HIGWithheld for tax401997Form 4
2026-02-17HIGAward / grant776776Form 4
2026-02-17HIGOption exercise7761,398Form 4
2026-02-17HIGOption exercise7760Form 4
2025-02-26HIGWithheld for tax3511,708Form 4
2025-02-25HIGAward / grant6663,692Form 4
2025-02-21HIGWithheld for tax2271,022Form 4
2025-02-18HIGOption exercise6191,249Form 4
2025-02-18HIGAward / grant619619Form 4
2025-02-18HIGOption exercise6190Form 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.