PEN Short Volume
Penumbra, Inc. (PEN) operates in the Healthcare sector, specifically the Medical - Devices industry, with a market capitalization near $12.54B, 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
- 2026-09-30
- Short Volume
- 70.7K
- Total Volume
- 141.5K
- Short %
- 49.96%
- 30-Day Avg Short %
- 54.64%
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 |
|---|---|---|---|---|---|---|---|
| CALL | $330.00 | Oct 16, 2026 | 1 | 240 | 699.3% | $0.30 | $1.00 |
| PUT | $450.00 | Oct 16, 2026 | 0 | 162 | 200.1% | $122.10 | $142.00 |
| PUT | $400.00 | Jan 15, 2027 | 0 | 278 | 161.5% | $206.10 | $225.90 |
| PUT | $380.00 | Jan 15, 2027 | 0 | 183 | 159.5% | $186.10 | $205.90 |
| PUT | $320.00 | Jan 15, 2027 | 0 | 109 | 151.3% | $128.10 | $147.80 |
| PUT | $310.00 | Jan 15, 2027 | 0 | 154 | 149.8% | $118.10 | $137.90 |
| PUT | $300.00 | Jan 15, 2027 | 0 | 1.1K | 147.9% | $112.50 | $129.90 |
| CALL | $290.00 | Jan 15, 2027 | 0 | 101 | 144.8% | $22.10 | $41.90 |
| PUT | $320.00 | Dec 18, 2026 | 0 | 121 | 125.4% | $98.10 | $117.80 |
| PUT | $220.00 | Jan 15, 2027 | 0 | 116 | 123.4% | $36.10 | $55.90 |
Top 10 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 Sep 30, 2026, Penumbra, Inc. (PEN) short volume is 70.7K shares against 141.5K total reported volume, or 49.96% 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.