Primary filings index — Coherent Corp.
CIK 0000820318. Carries forward all legacy II-VI Incorporated filings (1995-10-04 → 2022-09-08) and all Coherent Corp. filings (2022-09-08 onward).
EDGAR canonical feeds
Annual filings
| Form | Coverage | Filing window |
|---|---|---|
| 10-K | FY (52/53-week, ending Saturday closest to June 30) | Annual, typically mid-August |
The most recent 10-K is filed August 15, 2025 for FY2025 (July 2024 – late June 2025).
Quarterly filings
| Form | Coverage | Filing window |
|---|---|---|
| 10-Q | Q1, Q2, Q3 of fiscal year | Within 40 days of quarter-end |
For COHR, fiscal-quarter mapping: Q1 FY = Jul–Sep, Q2 FY = Oct–Dec, Q3 FY = Jan–Mar, Q4 = Apr–late Jun (rolled into 10-K).
Event-driven filings
| Form | Use |
|---|---|
| 8-K | Material agreements (NVDA $2B Mar 2 2026 placement; Coherent Inc. Jul 1 2022 closing; Finisar Sep 24 2019 closing), earnings releases, capital actions, leadership changes |
| 8-K/A | Amendments to prior 8-Ks |
Insider activity
| Form | Use |
|---|---|
| Form 3 | Initial statement of beneficial ownership (new insider) |
| Form 4 | Real-time transaction reporting (within 2 business days) |
| Form 5 | Annual statement of changes (10b5-1 plan exempt transactions) |
US-domestic filer; Section 16(a) reporting has been continuous since the 1995 II-VI re-incorporation. No HFIAA gap.
Beneficial ownership
| Form | Use |
|---|---|
| Schedule 13G | Passive 5%+ holder filings |
| Schedule 13G/A | Amendments to 13G |
| Schedule 13D | Active 5%+ holder filings |
| Schedule 13D/A | Amendments to 13D |
M&A-related filings
The 2019 Finisar acquisition and 2022 Coherent Inc. acquisition each generated extensive S-4 / S-4/A merger registration statements, 425 prospectus filings, and DEFM14A merger proxy statements — searchable in the EDGAR feed under the form-type filters.
Legacy II-VI filings (pre-2022-09-08)
All legacy II-VI Incorporated filings carry CIK 0000820318. The form-type set is identical (10-K / 10-Q / 8-K / Form 4 / 13G / DEF 14A / S-4) under the prior registrant name “II-VI INCORPORATED.”
Methodology
See Methodology — COHR-specific for the canonical pipeline:
edgar_monitor.py --cik 0000820318— daily delta of recent filingsedgar_form4_history.py --cik 0000820318 --ticker COHR— Form 4 backfill + deltaedgar_form4_parse.py— parses the Form 4 XML into the JSON dataset