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primarysourced Photonics sector Coherent
COHR
~1 min read · 286 words ·updated 2026-04-29

Insider transactions log — Coherent Corp.

Data source: companies/cohr/data/STOCK_INSIDER_TRANSACTIONS.json and companies/cohr/data/insider_history.json. Auto-refreshed daily by edgar_form4_history.py --cik 0000820318 --ua "COHR Research ward@elst.be" --ticker COHR.

Filing regime

Coherent is a US-domestic filer; Section 16(a) reporting has applied continuously since the 1995 II-VI re-incorporation. Form 4 is filed by reporting persons (officers, directors, 10%+ holders) within 2 business days of the transaction. There is no HFIAA gap (HFIAA closed the FPI Section 16(a) carve-out for Foreign Private Issuers in March 2026; that change does not affect Coherent’s reporting cadence because Coherent has always been a domestic filer).

10b5-1 plans

10b5-1 trading plans are common among COHR named executive officers. The Form 4 disclosure footer is parsed for 10b5-1 plan flags by edgar_form4_parse.py and surfaced in the JSON dataset.

Era split

scripts.env for COHR sets FORM4_ERA_SPLIT_DATE= (empty) — Coherent has not had a discrete CEO-transition era boundary that warrants splitting the Form 4 history. The June 3, 2024 transition from Mattera to Anderson is the closest candidate but the broader pattern of 10b5-1-driven sales doesn’t change shape across that boundary. (Compare: LWLG splits on 2024-12-11 Lebby/LeMaitre — that’s a thesis-load-bearing era split.)

What to watch

  • Post-March 2026 NVDA-deal-window selling/buying behavior by NEOs and directors.
  • Founder/legacy II-VI / Finisar / legacy Coherent Inc. directors who joined the board through M&A — track 10b5-1 vs ad-hoc transactions to gauge insider conviction near catalyst dates.
  • Bain Capital Series B Convertible Preferred conversion mechanics — if Bain converts, the resulting common-stock position would trigger Form 4 (10%+ holder) and Schedule 13G/13D filings.

Companion pages