Nuburu Short Interest Surges 49% in March

Got story updates? Submit your updates here. ›

Nuburu, Inc., a U.S. photonics company specializing in high-power blue laser technology, experienced a 49% increase in short interest during March 2026. As of March 31st, short positions totaled 23.4 million shares, up from 15.7 million shares two weeks earlier. The surge in short interest comes as Nuburu's stock price has declined significantly over the past year, falling from a 52-week high of $4.25 to just $0.22 per share.

Why it matters

The sharp rise in short interest suggests growing investor skepticism about Nuburu's business prospects and the company's ability to capitalize on its proprietary blue laser technology. This could indicate broader concerns about the overall outlook for the industrial manufacturing sector that Nuburu serves.

The details

Nuburu's blue lasers operate at a wavelength of 450 nanometers, offering improved absorption in copper and copper alloys compared to traditional infrared lasers. This enables faster processing speeds, higher precision, and reduced thermal distortion in materials processing tasks like welding, brazing, cladding, and additive manufacturing. However, the company has struggled with its stock price, which has fallen over 90% from its 52-week high.

• As of March 31st, 2026, Nuburu had 23,376,035 shares sold short.
• This represents a 49.0% increase from the 15,687,831 shares sold short as of March 15th, 2026.

What’s next

Investors will be closely watching Nuburu's upcoming earnings report and any updates on the company's strategy to address the concerns that have led to the surge in short positions.