PEN Short Volume
Penumbra, Inc. (PEN) operates in the Healthcare sector, specifically the Medical - Devices industry, with a market capitalization near $12.88B, listed on NYSE, employing roughly 4,700 people, carrying a beta of 0.70 to the broader market. Penumbra, Inc. Led by Adam Elsesser, public since 2015-09-18.
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
- 2026-08-14
- Short Volume
- 17.5K
- Total Volume
- 53.4K
- Short %
- 32.70%
- 30-Day Avg Short %
- 43.11%
Showing 30 days of FINRA short volume data for Penumbra, Inc..
Learn how short volume is reported and how to read the data →
PEN most-active contracts
| Type | Strike | Expiration | Volume | OI | IV | Bid | Ask |
|---|---|---|---|---|---|---|---|
| PUT | $400.00 | Jan 15, 2027 | 0 | 278 | 164.4% | $178.00 | $194.00 |
| PUT | $380.00 | Jan 15, 2027 | 0 | 183 | 161.4% | $158.10 | $177.80 |
| PUT | $320.00 | Jan 15, 2027 | 0 | 100 | 147.5% | $100.10 | $119.80 |
| PUT | $300.00 | Jan 15, 2027 | 0 | 2.0K | 146.7% | $82.10 | $101.80 |
| PUT | $310.00 | Jan 15, 2027 | 0 | 152 | 146.0% | $90.10 | $109.90 |
| CALL | $290.00 | Jan 15, 2027 | 0 | 101 | 145.4% | $30.10 | $49.90 |
Top 6 contracts from the institutional-grade nightly options scan; ranked by volume within the broader S&P 500/400/600 + ETF universe.
Frequently asked PEN short volume questions
- What is the daily PEN short volume?
- As of Aug 14, 2026, Penumbra, Inc. (PEN) short volume is 17.5K shares against 53.4K total reported volume, or 32.70% short-side. Short volume measures shares sold short during the day; it is flow, not inventory.
- How is PEN 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 PEN 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.