GUNDERMANN PETER J

Director · Officer · ATRO

As of 2026-09-16, GUNDERMANN PETER J has 33 Form 4 transactions on record across 1 company — 28 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: $161KIndirect: $0$161Kas of 2026-09-16
  • Direct $161K
  • Indirect $0
ATROdirect2,430 sh$161K

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

ATRO · 29 trades
2026-06-15: Other acquisition, 168,375 sh ($0)2026-06-15: Other acquisition, 2,430 sh ($0)2026-06-15: Other acquisition, 5,950 sh ($0)2026-06-15: Other acquisition, 5,050 sh ($0)2026-06-15: Other acquisition, 15,160 sh ($0)2026-06-15: Other acquisition, 5,290 sh ($0)2026-06-15: Other acquisition, 16,780 sh ($0)2026-06-15: Other acquisition, 25,000 sh ($0)2026-06-15: Other acquisition, 23,160 sh ($0)2026-06-15: Other acquisition, 19,780 sh ($0)2026-06-15: Other acquisition, 12,240 sh ($0)2026-06-15: Other acquisition, 6,958 sh ($0)2026-06-15: Other acquisition, 6,049 sh ($0)2026-06-15: Other acquisition, 3,325 sh ($0)2026-03-03: Option exercise, 13,550 sh ($1.1M)2026-03-03: Withheld for tax, 3,489 sh ($284K)2026-03-03: Option exercise, 13,550 sh ($0)2026-02-19: Award / grant, 12,150 sh ($0)2025-12-04: Award / grant, 29,750 sh ($1.5M)2025-11-20: Withheld for tax, 11,707 sh ($578K)2025-11-20: Option exercise, 13,700 sh ($380K)2025-11-20: Option exercise, 13,700 sh ($380K)2025-11-20: Option exercise, 4,418 sh ($122K)2025-11-20: Option exercise, 4,418 sh ($122K)2025-03-18: Withheld for tax, 4,133 sh ($103K)2025-03-18: Option exercise, 11,063 sh ($0)2025-03-18: Option exercise, 11,063 sh ($0)2025-02-27: Award / grant, 25,250 sh ($0)2024-12-05: Award / grant, 75,800 sh ($1.3M)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
33 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-06-15ATROOther acquisition168,375916,286Form 4
2026-06-15ATROOther acquisition2,4302,430Form 4
2026-06-15ATROOther acquisition5,9505,950Form 4
2026-06-15ATROOther acquisition5,0505,050Form 4
2026-06-15ATROOther acquisition15,16015,160Form 4
2026-06-15ATROOther acquisition5,2905,290Form 4
2026-06-15ATROOther acquisition16,78016,780Form 4
2026-06-15ATROOther acquisition25,00025,000Form 4
2026-06-15ATROOther acquisition23,16023,160Form 4
2026-06-15ATROOther acquisition19,78019,780Form 4
2026-06-15ATROOther acquisition12,24012,240Form 4
2026-06-15ATROOther acquisition6,9586,958Form 4
2026-06-15ATROOther acquisition6,0499,994Form 4
2026-06-15ATROOther acquisition3,3255,494Form 4
2026-03-03ATROOption exercise13,55097,457Form 4
2026-03-03ATROWithheld for tax3,48993,968Form 4
2026-03-03ATROOption exercise13,5500Form 4
2026-02-19ATROAward / grant12,15012,150Form 4
2025-12-04ATROAward / grant29,75029,750Form 4
2025-11-20ATROWithheld for tax11,70783,907Form 4
2025-11-20ATROOption exercise13,70095,614Form 4
2025-11-20ATROOption exercise13,7000Form 4
2025-11-20ATROOption exercise4,4180Form 4
2025-11-20ATROOption exercise4,418747,911Form 4
2025-11-11—Award / grant57511,545Form 4
2025-10-28—Withheld for tax79010,970Form 4
2025-10-28—Option exercise2,50011,760Form 4
2025-10-28—Option exercise2,5000Form 4
2025-03-18ATROWithheld for tax4,13379,117Form 4
2025-03-18ATROOption exercise11,0630Form 4
2025-03-18ATROOption exercise11,06386,047Form 4
2025-02-27ATROAward / grant25,25025,250Form 4
2024-12-05ATROAward / grant75,80075,800Form 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.