Here are the Form 4 insider transactions from Nuburu, Inc. (BURU) in our archive over the last 12 months, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow BURU and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full BURU filings page.
Nuburu, Inc. director and Co‑Chief Executive Officer Alessandro Zamboni reported two acquisitions of common stock. On December 31, 2025, Vanguard Holdings S.r.l., an entity owned by him, recorded an open‑market purchase of 4,332,525 shares at $0.3453 per share, held indirectly. A footnote explains this reflects the conversion of two Company convertible promissory notes of $545,000 and $900,000, plus interest, into 21,619,298 shares before adjustment for a 1‑for‑4.99 reverse stock split.
Separately, on October 1, 2025, Zamboni was granted 1,774,000 restricted stock units, which vested on October 31, 2025. After the 2026 reverse stock split, this grant is shown in the table as 355,511 shares of common stock held directly.