RGEN Short Volume
Repligen Corporation (RGEN) operates in the Healthcare sector, specifically the Medical - Instruments & Supplies industry, with a market capitalization near $10.85B, listed on NASDAQ, employing roughly 2,000 people, carrying a beta of 1.05 to the broader market. Repligen Corporation specializes in the creation and distribution of advanced bioprocessing technologies and integrated systems. Led by Olivier Loeillot, public since 1986-04-29.
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
- 2026-09-30
- Short Volume
- 237.3K
- Total Volume
- 296.2K
- Short %
- 80.10%
- 30-Day Avg Short %
- 66.03%
Showing 30 days of FINRA short volume data for Repligen Corporation.
Learn how short volume is reported and how to read the data →
RGEN most-active contracts
| Type | Strike | Expiration | Volume | OI | IV | Bid | Ask |
|---|---|---|---|---|---|---|---|
| CALL | $200.00 | Oct 16, 2026 | 71 | 2.4K | 45.8% | $3.90 | $4.60 |
Top 1 contracts from the institutional-grade nightly options scan; ranked by volume within the broader S&P 500/400/600 + ETF universe.
Frequently asked RGEN short volume questions
- What is the daily RGEN short volume?
- As of Sep 30, 2026, Repligen Corporation (RGEN) short volume is 237.3K shares against 296.2K total reported volume, or 80.10% short-side. Short volume measures shares sold short during the day; it is flow, not inventory.
- How is RGEN 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 RGEN 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.