Langenbacher Stefano

Officer · SEAT

As of 2026-09-17, Langenbacher Stefano has 57 Form 4 transactions on record across 1 company — 43 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: $465KIndirect: $0$465Kas of 2026-09-17
  • Direct $465K
  • Indirect $0
SEATdirect111,247 sh$465K

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

SEAT · 57 trades
2026-09-11: Withheld for tax, 19,262 sh ($95K)2026-09-11: Option exercise, 1,817 sh ($0)2026-09-11: Option exercise, 38,226 sh ($0)2026-09-11: Option exercise, 4,448 sh ($0)2026-09-11: Option exercise, 44,491 sh2026-09-11: Option exercise, 44,491 sh2026-09-11: Option exercise, 44,491 sh2026-09-11: Option exercise, 44,491 sh2026-08-12: Withheld for tax, 221 sh ($2K)2026-08-12: Option exercise, 592 sh ($0)2026-08-12: Option exercise, 592 sh2026-08-12: Option exercise, 592 sh2026-08-12: Option exercise, 592 sh2026-08-12: Option exercise, 592 sh2026-06-11: Withheld for tax, 19,708 sh ($168K)2026-06-11: Option exercise, 38,226 sh ($0)2026-06-11: Option exercise, 4,448 sh ($0)2026-06-11: Option exercise, 1,817 sh ($0)2026-06-11: Option exercise, 44,491 sh2026-06-11: Option exercise, 44,491 sh2026-05-12: Withheld for tax, 256 sh ($2K)2026-05-12: Option exercise, 592 sh ($0)2026-05-12: Option exercise, 592 sh2026-05-12: Option exercise, 592 sh2026-03-11: Withheld for tax, 25,620 sh ($156K)2026-03-11: Option exercise, 38,226 sh ($0)2026-03-11: Option exercise, 1,817 sh ($0)2026-03-11: Option exercise, 17,793 sh ($0)2026-03-11: Option exercise, 57,836 sh2026-03-11: Option exercise, 57,836 sh2026-02-12: Withheld for tax, 252 sh ($2K)2026-02-12: Option exercise, 592 sh ($0)2026-02-12: Option exercise, 592 sh2026-02-12: Option exercise, 592 sh2025-12-15: Award / grant, 305,810 sh ($0)2025-12-11: Withheld for tax, 804 sh ($6K)2025-12-11: Option exercise, 1,817 sh ($0)2025-12-11: Option exercise, 1,817 sh2025-12-11: Option exercise, 1,817 sh2025-11-12: Withheld for tax, 693 sh ($7K)2025-11-12: Option exercise, 2,368 sh ($0)2025-11-12: Option exercise, 2,368 sh2025-11-12: Option exercise, 2,368 sh2025-09-11: Withheld for tax, 804 sh ($14K)2025-09-11: Option exercise, 1,817 sh ($0)2025-09-11: Option exercise, 1,817 sh2025-09-11: Option exercise, 1,817 sh2025-06-11: Withheld for tax, 15,977 sh ($29K)2025-06-11: Option exercise, 36,337 sh ($0)2025-06-11: Option exercise, 36,337 sh2025-06-11: Option exercise, 36,337 sh2025-03-13: Award / grant, 1,067,615 sh ($0)2025-03-11: Withheld for tax, 65,521 sh ($247K)2025-03-11: Option exercise, 145,347 sh ($0)2025-03-11: Option exercise, 145,347 sh2025-03-11: Option exercise, 145,347 sh2024-11-11: Award / grant, 142,118 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
57 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-09-11SEATWithheld for tax19,26291,985Form 4
2026-09-11SEATOption exercise1,8173,634Form 4
2026-09-11SEATOption exercise38,226191,132Form 4
2026-09-11SEATOption exercise4,44826,692Form 4
2026-09-11SEATOption exercise44,491111,247Form 4
2026-09-11SEATOption exercise44,491111,247Form 4
2026-09-11SEATOption exercise44,491111,247Form 4
2026-09-11SEATOption exercise44,491111,247Form 4
2026-08-12SEATWithheld for tax22166,756Form 4
2026-08-12SEATOption exercise5922,962Form 4
2026-08-12SEATOption exercise59266,977Form 4
2026-08-12SEATOption exercise59266,977Form 4
2026-08-12SEATOption exercise59266,977Form 4
2026-08-12SEATOption exercise59266,977Form 4
2026-06-11SEATWithheld for tax19,70866,385Form 4
2026-06-11SEATOption exercise38,226229,358Form 4
2026-06-11SEATOption exercise4,44831,140Form 4
2026-06-11SEATOption exercise1,8175,451Form 4
2026-06-11SEATOption exercise44,49186,093Form 4
2026-06-11SEATOption exercise44,49186,093Form 4
2026-05-12SEATWithheld for tax25641,602Form 4
2026-05-12SEATOption exercise5923,554Form 4
2026-05-12SEATOption exercise59241,858Form 4
2026-05-12SEATOption exercise59241,858Form 4
2026-03-11SEATWithheld for tax25,62041,266Form 4
2026-03-11SEATOption exercise38,226267,584Form 4
2026-03-11SEATOption exercise1,8177,268Form 4
2026-03-11SEATOption exercise17,79335,588Form 4
2026-03-11SEATOption exercise57,83666,886Form 4
2026-03-11SEATOption exercise57,83666,886Form 4
2026-02-12SEATWithheld for tax2529,050Form 4
2026-02-12SEATOption exercise5924,146Form 4
2026-02-12SEATOption exercise5929,302Form 4
2026-02-12SEATOption exercise5929,302Form 4
2025-12-15SEATAward / grant305,810305,810Form 4
2025-12-11SEATWithheld for tax8048,710Form 4
2025-12-11SEATOption exercise1,8179,085Form 4
2025-12-11SEATOption exercise1,8179,514Form 4
2025-12-11SEATOption exercise1,8179,514Form 4
2025-11-12SEATWithheld for tax6937,697Form 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.