Zamboni Alessandro 4
4 · Nuburu, Inc. · Filed Apr 22, 2026
Research Summary
AI-generated summary of this filing
Nuburu (BURU) CEO Alessandro Zamboni Buys Stock & Receives Award
What Happened
Alessandro Zamboni, CEO of Nuburu, reported two acquisitions: (1) a grant/vesting of restricted stock units (RSUs) — 355,511 shares shown in the table (adjusted for a later 1-for-4.99 reverse split) that were granted Oct 1, 2025 and vested Oct 31, 2025 (reported value $0 in the table); and (2) an acquisition of 4,332,525 shares on Dec 31, 2025 reported as a purchase at $0.35 per share (total reported consideration $1,496,021). The Dec 31 transaction reflects conversion of two convertible promissory notes by Vanguard Holdings S.r.l., an entity owned by Zamboni, into common stock at a discount.
Key Details
- Transaction dates and types:
- 2025-10-01: Grant/award (RSUs) — 355,511 shares (table adjusted for 2026 reverse split); vested Oct 31, 2025. (Footnote F1)
- 2025-12-31: Purchase/conversion (code P) — 4,332,525 shares at $0.35 per share; reported consideration $1,496,021. (Footnote F2)
- Footnotes of note:
- F1: Original grant was 1,774,000 RSUs (pre-split); numbers in table adjusted for a 1-for-4.99 reverse stock split effective March 2, 2026.
- F2: Vanguard Holdings S.r.l. converted two promissory notes ($545,000 and $900,000 plus interest) into equity at a conversion price equal to a 33.33% discount to the 5‑day VWAP; share and price figures are split-adjusted in the table.
- Shares owned after the transactions: not specified in the Form 4 provided.
- Filing timeliness: Report filed 2026-04-22 for transactions in Oct and Dec 2025 — this filing was late (transactionTimeliness = 'L').
Context
The RSU entry reflects compensation that vested; the Dec 31 acquisition was a debt-to-equity conversion executed by an entity Zamboni owns (not an immediate open-market buy with cash from his brokerage). Purchases or conversions like this increase insider shareholding but do not, by themselves, explain the insider's motive.
Insider Transaction Report
- Award
Common Stock
[F1]2025-10-01+355,511→ 355,511 total - Purchase
Common Stock
[F2]2025-12-31$0.35/sh+4,332,525$1,496,021→ 4,332,525 total(indirect: By Vanguard Holdings S.r.l.)
Footnotes (2)
- [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.
- [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.