Is Penumbra Inc (PEN) a risky stock?
As of July 27, 2026, Clavix grades Penumbra Inc (PEN) A for risk, a composite score of 89 out of 100 on an A+ to F scale, which puts PEN in the "low risk" band. The grade is a risk read for educational purposes, not a buy or sell recommendation.
Grade as of July 27, 2026. Clavix regrades every trading day.
The five risk dimensions behind PEN's grade
Each Clavix grade is a composite of five independent reads. Higher is safer. Here is how PEN scores on each, as of July 27, 2026.
What's moving PEN's risk right now
Company-specific signals Clavix flags behind PEN's current grade, drawn from recent news and filings as of July 27, 2026.
Calamos, Arrowstreet Capital, and Gabelli Funds all reported new or increased Penumbra positions in their latest 13F filings. The buys are modest in size but suggest some large investors are gaining confidence in the stock.
Penumbra's THUNDERBOLT device met safety and effectiveness goals in the THUNDER clinical study for stroke care. The results reinforce the company's first-mover position and could help it win share from rivals using older thrombectomy methods.
A major health system has started using Penumbra's THUNDERBOLT system in real-world stroke treatment, supporting the product's commercial prospects. The stock's mixed long-term returns suggest investors are still unsure how durable the growth story will be.
Recent PEN news
The latest headlines Clavix ingested for Penumbra Inc, newest first. These feed the news-sentiment dimension of PEN's grade.
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Arrowstreet Capital Limited Partnership increased its holdings in Penumbra, Inc. (NYSE:PEN) by 130.2% in the first quarter, owning 400,160 shares according to its latest 13F filing with the SEC.
What a A grade means
On the Clavix A+ to F scale, PEN's composite of 89 falls in the A band (80–100), read as "low risk." The scale is fixed, so the meaning never moves.
This page is generated from Clavix's own risk model and is for educational purposes only. It is not investment advice or a recommendation to buy or sell PEN or any security. Grades are risk indicators, not predictions of return. Data may be delayed.