Senseonics Holdings, Inc. (AMEX:SENS) saw its stock surge 5.13% in after-hours trading on Tuesday, following the release of preliminary third-quarter results and the announcement of a reverse stock split. This comes as a stark contrast to the regular trading session, where the stock had tumbled 17.5% to $0.4662.

The company reported preliminary Q3 FY25 revenue of approximately $8.1 million, surpassing analyst expectations of $7.8 million and representing a substantial 91% year-over-year increase. This growth was primarily driven by a 160% year-over-year rise in new U.S. patients, attributed to higher direct-to-consumer marketing investments. Notably, Senseonics achieved its highest-ever monthly new patient starts in September 2025.

In addition to the strong financial performance, Senseonics announced a one-for-twenty reverse stock split of its common shares. This move will reduce the total outstanding stock from approximately 816 million to roughly 41 million shares, subject to adjustments for fractional shares paid in cash. The split is set to take effect on October 17, 2025, with post-split trading commencing on October 20, 2025. This strategic decision, coupled with the positive Q3 results, appears to have boosted investor confidence, leading to the after-hours stock price surge.