Short interest history — Coherent Corp.

Data source: companies/cohr/data/STOCK_SHORT_INTEREST.json. Auto-refreshed bi-monthly via update_finra.py --ticker COHR.

Cadence

FINRA disseminates short-interest prints twice per month (settlement-date prints, ~10–14 days after the settlement date). The pipeline pulls the most recent print after each release.

Schema

The JSON dataset stores one row per FINRA print with:

Field	Description
settlementDate	YYYY-MM-DD
shortInterestShares	Reported short-interest share count
daysToCover	FINRA-reported days-to-cover (avg daily volume basis)
pctOfFloat	Computed (shortInterestShares / float) using the float field from STOCK_PRICE_DATA.json

Notes

• Short-interest reports lag the report-window settlement date by ~10–14 days; treat each datapoint as a snapshot of the situation ~2 weeks prior.
• Days-to-cover is computed by FINRA using a 30-day average daily volume window.
• The float used in pctOfFloat is auto-pulled from Yahoo quoteSummary and may be stale after Coherent’s NVDA $2B placement on Mar 2, 2026 (which added 7,788,161 shares of common stock — see stock price history).

Companion pages

• Stock price history — daily OHLC + structural events
• Insider transactions log — Form 4 series
• Institutional holders — 13F / 13G top-holder roster
• Off-exchange / dark-pool — FINRA ATS share %