Form 4 for BURU Nuburu, Inc.
Accepted 2026-04-22 16:53:40 ET · period of report 2025-10-01 · accession 0001193125-26-170692 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-04-22 16:53 | 2025-10-01 | BURU | Zamboni Alessandro | Co-CEO, Dir | A - Grant | $0.00 | +355.5K | 355.5K | New | $0 | |
| I | 2026-04-22 16:53 | 2025-12-31 | BURU | Zamboni Alessandro | Co-CEO, Dir | P - Purchase | $0.3453 | +4.33M | 4.33M | New | +$1.50M |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2025-10-01 | A | A | 355,511 | $0.00 | 355,511 | D | — | — | (F1) On October 1, 2025, the reporting person was granted 1,774,000 restricted stock units, which vested on October 31, 2025. Nuburu, Inc. (the "Company") effected a reverse stock split on February 27, 2026, and its common stock began trading on a 1-for-4.99 split-adjusted basis (with every 4.99 shares being converted into a single share) at the commencement of trading on March 2, 2026 (the "2026 Reverse Stock Split"). The number of restricted stock units in the table has been adjusted for the 2026 Reverse Stock Split. |
| 2 | Common | Common Stock | 2025-12-31 | P | A | 4,332,525 | $0.3453 | 4,332,525 | I By Vanguard Holdings S.r.l. | — | — | (F2) On December 31, 2025, Vanguard Holdings S.r.l., an entity owned by the reporting person, converted (i) a convertible promissory note in the amount of $545,000 issued by Nuburu, Inc. (the "Company"), plus outstanding interest, and (ii) a convertible promissory note in the amount of $900,000 issued by the Company, plus outstanding interest, in exchange for 21,619,298 shares of common stock at a conversion price equal to a 33.33% discount to the lowest daily volume weighted average price as reported by Bloomberg L.P. during the five days prior to the conversion date. The number of shares acquired and the price per share in the table have been adjusted for the 2026 Reverse Stock Split. (F2) On December 31, 2025, Vanguard Holdings S.r.l., an entity owned by the reporting person, converted (i) a convertible promissory note in the amount of $545,000 issued by Nuburu, Inc. (the "Company"), plus outstanding interest, and (ii) a convertible promissory note in the amount of $900,000 issued by the Company, plus outstanding interest, in exchange for 21,619,298 shares of common stock at a conversion price equal to a 33.33% discount to the lowest daily volume weighted average price as reported by Bloomberg L.P. during the five days prior to the conversion date. The number of shares acquired and the price per share in the table have been adjusted for the 2026 Reverse Stock Split. |