BMRN Short Volume
BioMarin Pharmaceutical Inc. (BMRN) operates in the Healthcare sector, specifically the Biotechnology industry, with a market capitalization near $10.35B, listed on NASDAQ, employing roughly 3,040 people, carrying a beta of 0.23 to the broader market. BioMarin Pharmaceutical Inc. Led by Alexander Hardy, public since 1999-07-26.
Short volume measures the number of shares sold short on a given day as reported by FINRA. Tracking short volume relative to total volume helps identify unusual bearish sentiment or short-squeeze potential.
- Latest Date
- 2026-05-15
- Short Volume
- 358.5K
- Total Volume
- 965.1K
- Short %
- 37.14%
- 30-Day Avg Short %
- 52.81%
Showing 30 days of FINRA short volume data for BioMarin Pharmaceutical Inc..
Learn how short volume is reported and how to read the data →
BMRN most-active contracts
| Type | Strike | Expiration | Volume | OI | IV | Bid | Ask |
|---|---|---|---|---|---|---|---|
| CALL | $57.50 | Aug 21, 2026 | 346 | 144 | 33.3% | $1.85 | $1.95 |
Top 1 contracts from the ORATS-sourced nightly scan; ranked by volume within the broader S&P 500/400/600 + ETF universe.
Frequently asked BMRN short volume questions
- What is the daily BMRN short volume?
- As of May 15, 2026, BioMarin Pharmaceutical Inc. (BMRN) short volume is 358.5K shares against 965.1K total reported volume, or 37.14% short-side. Short volume measures shares sold short during the day; it is flow, not inventory.
- How is BMRN short volume reported?
- FINRA publishes the Daily Short Sale Volume File for trades reported to FINRA TRFs and the FINRA/Nasdaq ADF on a T+1 basis. The headline figure is the count of shares that printed at the short-sale or short-exempt tick across all reporting venues for the symbol; each exchange separately publishes its own daily short-sale data file.
- What does BMRN short volume tell options traders?
- Daily short-sale flow is one input that helps disambiguate dealer-hedging activity from directional bear flow when the chain shows fresh customer call inventory. It is not a clean MM-only proxy: the headline number mixes directional shorting, options-MM delta-hedging, ETF-creation arbitrage, and convertible-arb hedging. Cross-check against gamma-exposure and OI changes for a cleaner read.