BURU · Nuburu, Inc.
Substantial doubt about the company's ability to continue as a going concern.
“The Company has identified conditions that raise substantial doubt about its ability to continue as a going concern within 12 months from the issuance of these condensed consolidated financial statements, including historical operating losses, negative cash flows from operations, significant debt service obligations, and reliance on external financing.”View the 10-Q filed May 20, 2026
Trades by corporate insiders — officers, directors and holders of more than 10% of the shares — disclosed to the SEC on Forms 3, 4 and 5. Form 4 must be filed within two business days of the trade.
| Date | Insider | Role | Type | Security | Shares |
|---|---|---|---|---|---|
| 2025-12-31 | Zamboni Alessandro |
Director, Co-Chief Executive Officer |
Buy↑
Filing footnotes — Common Stock (Indirect)
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. |
Common Stock
(I)
|
4,332,525 |
| 2025-10-01 | Zamboni Alessandro |
Director, Co-Chief Executive Officer |
Award↑
Filing footnotes — Common Stock (Direct)
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. |
Common Stock
|
355,511 |
| 2024-12-31 | Taylor Shawn |
Director |
Other↑
|
No Securities Owned
|
0 |
| 2024-12-31 | Barisoni Dario |
Director |
Other↑
|
No Securities Owned
|
0 |
| 2024-11-21 | Seldin David |
10% Owner |
Other↑
Filing footnotes — Common Stock (Direct)
These securities are owned directly by Whitney Haring-Smith, who may be deemed a member of a "group" for purposes of Section 13(d) of the Exchange Act with each of the other Reporting Persons and Mr. Hirsch. Represents 3,210 shares received by the Reporting Person in connection with a pro-rata in-kind distribution by Anzu Nuburu LLC to its members; 1,434 shares received by the Reporting Person in connection with a pro-rata in-kind distribution by Anzu Nuburu II LLC to its members; and 747 shares received by the Reporting Person in connection with a pro-rata in-kind distribution by Anzu Nuburu III LLC to its members, in each case for no consideration. On July 23, 2024, the Issuer completed a one-for-forty reverse stock split of its common stock. All of the share numbers reported herein have been adjusted to reflect this reverse stock split. |
Common Stock
|
5,391 |
| 2024-11-21 | Seldin David |
10% Owner |
Other↑
Filing footnotes — Common Stock (Direct)
These securities are owned directly by David Seldin, who may be deemed a member of a "group" for purposes of Section 13(d) of the Exchange Act with each of the other Reporting Persons and Mr. Hirsch. Represents 14,223 shares received by the Reporting Person in connection with a pro-rata in-kind distribution by Anzu Nuburu LLC to its members; 7,285 shares received by the Reporting Person in connection with a pro-rata in-kind distribution by Anzu Nuburu II LLC to its members; 6,541 shares received by the Reporting Person in connection with a pro-rata in-kind distribution by Anzu Nuburu III LLC to its members; and 33,036 shares received by the Reporting Person in connection with a pro-rata in-kind distribution by Anzu Nuburu V LLC to its members, in each case for no consideration. On July 23, 2024, the Issuer completed a one-for-forty reverse stock split of its common stock. All of the share numbers reported herein have been adjusted to reflect this reverse stock split. |
Common Stock
|
61,085 |
| 2024-11-21 | Seldin David |
10% Owner |
Other↓
Filing footnotes — Common Stock (Direct)
These securities are owned directly by Anzu Nuburu LLC, which may be deemed a member of a "group" for purposes of Section 13(d) of the Exchange Act with each of the other Reporting Persons and Mr. Hirsch. Represents a pro-rata distribution in-kind by Anzu Nuburu LLC to its members for no consideration. On July 23, 2024, the Issuer completed a one-for-forty reverse stock split of its common stock. All of the share numbers reported herein have been adjusted to reflect this reverse stock split. |
Common Stock
|
52,862 |
| 2024-11-21 | Seldin David |
10% Owner |
Other↑
Filing footnotes — Common Stock (Direct)
These securities are owned directly by CST Global LLC, which may be deemed a member of a "group" for purposes of Section 13(d) of the Exchange Act with each of the other Reporting Persons and Mr. Hirsch. Represents 2,784 shares received by the Reporting Person in connection with a pro-rata in-kind distribution by Anzu Nuburu LLC to its members; 618 shares received by the Reporting Person in connection with a pro-rata in-kind distribution by Anzu Nuburu II LLC to its members; 497 shares received by the Reporting Person in connection with a pro-rata in-kind distribution by Anzu Nuburu III LLC to its members; and 21,645 shares received by the Reporting Person in connection with a pro-rata in-kind distribution by Anzu Nuburu V LLC to its members, in each case for no consideration. On July 23, 2024, the Issuer completed a one-for-forty reverse stock split of its common stock. All of the share numbers reported herein have been adjusted to reflect this reverse stock split. |
Common Stock
|
25,544 |
| 2024-11-21 | Seldin David |
10% Owner |
Other↓
Filing footnotes — Common Stock (Direct)
These securities are owned directly by Anzu Nuburu III LLC, which may be deemed a member of a "group" for purposes of Section 13(d) of the Exchange Act with each of the other Reporting Persons and Mr. Hirsch. Represents a pro-rata distribution in-kind by Anzu Nuburu III LLC to its members for no consideration. On July 23, 2024, the Issuer completed a one-for-forty reverse stock split of its common stock. All of the share numbers reported herein have been adjusted to reflect this reverse stock split. |
Common Stock
|
19,979 |
| 2024-11-21 | Seldin David |
10% Owner |
Other↓
Filing footnotes — Common Stock (Direct)
These securities are owned directly by Anzu Nuburu V LLC, which may be deemed a member of a "group" for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act") with each of the other Reporting Persons and Daniel Hirsch. Represents a pro-rata distribution in-kind by Anzu Nuburu V LLC to its members for no consideration. On July 23, 2024, the Issuer completed a one-for-forty reverse stock split of its common stock. All of the share numbers reported herein have been adjusted to reflect this reverse stock split. |
Common Stock
|
133,024 |
| 2024-11-21 | Seldin David |
10% Owner |
Other↓
Filing footnotes — Common Stock (Direct)
These securities are owned directly by Anzu Nuburu II LLC, which may be deemed a member of a "group" for purposes of Section 13(d) of the Exchange Act with each of the other Reporting Persons and Mr. Hirsch. Represents a pro-rata distribution in-kind by Anzu Nuburu II LLC to its members for no consideration. On July 23, 2024, the Issuer completed a one-for-forty reverse stock split of its common stock. All of the share numbers reported herein have been adjusted to reflect this reverse stock split. |
Common Stock
|
24,314 |
| 2024-10-01 | Hummel Kristi |
Director |
Award↑
|
Stock Option (right to buy)
|
13,889 |
| 2024-10-01 | Hughes Lily Yan |
SVP & Chief Legal Officer |
Award↑
|
Stock Option (right to buy)
|
6,945 |
| 2024-10-01 | Hirsch Daniel J. |
Director, CFO and Corporate Secretary |
Award↑
|
Stock Option (right to buy)
|
13,889 |
| 2024-07-01 | Hummel Kristi |
Director |
Award↑
|
Stock Option (right to buy)
|
13,889 |
| 2024-07-01 | Hirsch Daniel J. |
Director, CFO and Corporate Secretary |
Award↑
|
Stock Option (right to buy)
|
13,889 |
| 2024-07-01 | Hughes Lily Yan |
SVP & Chief Legal Officer |
Award↑
|
Stock Option (right to buy)
|
6,945 |
| 2024-05-10 | Knaley Brian |
Director, CFO/Treasurer |
Award↑
Filing footnotes — Common Stock (Direct)
Consists of restricted stock units granted on May 10, 2024 that vested immediately upon grant. |
Common Stock
|
1,828,996 |
| 2024-05-10 | Knaley Brian |
Director, CFO/Treasurer |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
25% of the shares subject to the option shall vest and become exercisable on the first anniversary of May 10, 2024 (the "Vesting Commencement Date"), and thereafter, the remainder of the reported securities vest in equal monthly increments over the following 36 months, such that 100% of the reported securities will be vested as of the fourth anniversary of the Vesting Commencement Date, subject to the Reporting Person remaining a service provider through such vesting date. |
Stock Option (right to buy)
|
920,000 |
| 2024-04-30 | Zamboni Alessandro |
Director, Co-Chief Executive Officer |
Other↑
|
No Securities Owned
|
0 |
| 2024-04-30 | Ricchebuono Matteo |
Director |
Other↑
|
No Securities Owned
|
0 |
| 2024-04-01 | BOLTON JOHN R |
Director |
Award↑
|
Stock Option (right to buy)
|
20,833 |
| 2024-04-01 | Hummel Kristi |
Director |
Award↑
|
Stock Option (right to buy)
|
20,833 |
| 2024-04-01 | Hirsch Daniel J. |
Director, CFO and Corporate Secretary |
Award↑
|
Stock Option (right to buy)
|
20,833 |
| 2024-04-01 | Hughes Lily Yan |
SVP & Chief Legal Officer |
Award↑
|
Stock Option (right to buy)
|
10,416 |
| 2024-01-02 | BOLTON JOHN R |
Director |
Award↑
|
Stock Option (right to buy)
|
41,667 |
| 2024-01-02 | Hughes Lily Yan |
SVP & Chief Legal Officer |
Award↑
|
Stock Option (right to buy)
|
20,834 |
| 2024-01-02 | Hirsch Daniel J. |
Director, CFO and Corporate Secretary |
Award↑
|
Stock Option (right to buy)
|
41,667 |
| 2024-01-02 | Hummel Kristi |
Director |
Award↑
|
Stock Option (right to buy)
|
41,667 |
| 2023-12-06 | Nicol Ronald Lee |
Director |
Buy↑
Filing footnotes — Warrant (right to buy) (Indirect)
Warrant to purchase shares of Nuburu, Inc. common stock, par value $0.0001 per share (the "Warrant"), was issued pursuant to a Note and Warrant Purchase Agreement dated as of November 13, 2023 (the "Purchase Agreement"). The exercise price is subject to adjustment pursuant to the terms of the Warrant. The Warrant was issued pursuant to the Purchase Agreement in connection with the purchase of a secured promissory note as partial consideration for the secured promissory note. The total consideration paid by the reporting person pursuant to the Purchase Agreement was $1,000,000. The securities are held directly by Eunomia, LP. Mr. Nicol is the manager of Eunomia, LP and exercises voting and investment control over these securities. |
Warrant (right to buy)
(I)
|
4,400,000 |
| 2023-11-01 | Knaley Brian |
Director, CFO/Treasurer |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
25% of the shares subject to the option shall vest and become exercisable on the first anniversary of November 1, 2023 (the "Vesting Commencement Date"), and thereafter, the remainder of the reported securities vest in equal monthly increments over the following 36 months, such that 100% of the reported securities will be vested as of the fourth anniversary of the Vesting Commencement Date, subject to the Reporting Person remaining a service provider through such vesting date. |
Stock Option (right to buy)
|
500,000 |
| 2023-10-02 | Hughes Lily Yan |
SVP & Chief Legal Officer |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
The shares subject to this stock option are subject to service-based vesting requirements. 1/9th of the shares subject to the option shall vest and become exercisable each month following the Exercisable Date, such that 100% of the shares subject to this stock option will be vested July 2, 2024, subject to the Reporting Person remaining a service provider through each such vesting date. |
Stock Option (right to buy)
|
7,500 |
| 2023-09-25 | Nicol Ronald Lee |
Director |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
The shares subject to this stock option are subject to service-based vesting requirements. 1/24th of the shares subject to the option shall vest and become exercisable each month following the Exercisable Date, such that 100% of the shares subject to this stock option will be vested October 25, 2025, subject to the Reporting Person remaining a service provider through each such vesting date. |
Stock Option (right to buy)
|
2,160,000 |
| 2023-09-01 | BOLTON JOHN R |
Director |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
The shares subject to this stock option are subject to service-based vesting requirements. 1/24th of the shares subject to the option shall vest and become exercisable on the first day of each month following September 1, 2023 (the "Vesting Commencement Date") beginning on October 1, 2023 such that 100% of the shares subject to this stock option will be vested on the two-year anniversary of the Vesting Commencement Date, subject to the Report Person remaining a service provider through each such vesting date. |
Stock Option (right to buy)
|
50,000 |
| 2023-08-31 | Hummel Kristi |
Director |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
The shares subject to this stock option are subject to service-based vesting requirements. 1/12th of the shares subject to the option shall vest and become exercisable on the first day of each month following January 31, 2023 beginning on February 1, 2023 such that 100% of the shares subject to this stock option will be vested on January 1, 2024, subject to the Report Person remaining a service provider through each such vesting date. |
Stock Option (right to buy)
|
18,750 |
| 2023-08-31 | Nicol Ronald Lee |
Director |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
The shares subject to this stock option are subject to service-based vesting requirements. 1/12th of the shares subject to the option shall vest and become exercisable on the first day of each month following June 16, 2023 beginning on July 1, 2023 such that 100% of the shares subject to this stock option will be vested on June 1, 2024, subject to the Report Person remaining a service provider through each such vesting date. |
Stock Option (right to buy)
|
187,500 |
| 2023-08-31 | BOLTON JOHN R |
Director |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
The shares subject to this stock option are subject to service-based vesting requirements. 1/10th of the shares subject to the option shall vest and become exercisable on the first day of each month following August 31, 2023 beginning on October 1, 2023 such that 100% of the shares subject to this stock option will be vested on the one-year anniversary of Nuburu, Inc. 2023 annual general meeting of stockholders, subject to the Report Person remaining a service provider through each such vesting date. |
Stock Option (right to buy)
|
41,667 |
| 2023-08-31 | BOLTON JOHN R |
Director |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
The shares subject to this stock option are subject to service-based vesting requirements. 1/12th of the shares subject to the option shall vest and become exercisable on the first day of each month following June 16, 2023 beginning on July 1, 2023 such that 100% of the shares subject to this stock option will be vested on June 1, 2024, subject to the Report Person remaining a service provider through each such vesting date. |
Stock Option (right to buy)
|
20,000 |
| 2023-08-31 | Hughes Lily Yan |
SVP & Chief Legal Officer |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
The shares subject to this stock option are subject to service-based vesting requirements. 1/12th of the shares subject to the option shall vest and become exercisable on the first day of each month following June 16, 2023 beginning on July 1, 2023 such that 100% of the shares subject to this stock option will be vested on June 1, 2024, subject to the Report Person remaining a service provider through each such vesting date. |
Stock Option (right to buy)
|
118,750 |
| 2023-08-31 | Hummel Kristi |
Director |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
The shares subject to this stock option are subject to service-based vesting requirements. 1/12th of the shares subject to the option shall vest and become exercisable on the first day of each month following June 16, 2023 beginning on July 1, 2023 such that 100% of the shares subject to this stock option will be vested on June 1, 2024, subject to the Report Person remaining a service provider through each such vesting date. |
Stock Option (right to buy)
|
105,000 |
| 2023-08-31 | Hirsch Daniel J. |
Director, CFO and Corporate Secretary |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
The shares subject to this stock option are subject to service-based vesting requirements. 1/12th of the shares subject to the option shall vest and become exercisable on the first day of each month following January 31, 2023 beginning on February 1, 2023 such that 100% of the shares subject to this stock option will be vested on January 1, 2024, subject to the Report Person remaining a service provider through each such vesting date. |
Stock Option (right to buy)
|
18,750 |
| 2023-08-31 | Mora Elizabeth |
Director |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
The shares subject to this stock option are subject to service-based vesting requirements. 1/12th of the shares subject to the option shall vest and become exercisable on the first day of each month following January 31, 2023 beginning on February 1, 2023 such that 100% of the shares subject to this stock option will be vested on January 1, 2024, subject to the Report Person remaining a service provider through each such vesting date. |
Stock Option (right to buy)
|
18,750 |
| 2023-08-31 | Mora Elizabeth |
Director |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
The shares subject to this stock option are subject to service-based vesting requirements. 1/12th of the shares subject to the option shall vest and become exercisable on the first day of each month following June 16, 2023 beginning on July 1, 2023 such that 100% of the shares subject to this stock option will be vested on June 1, 2024, subject to the Report Person remaining a service provider through each such vesting date. |
Stock Option (right to buy)
|
63,750 |
| 2023-08-31 | Hirsch Daniel J. |
Director, CFO and Corporate Secretary |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
The shares subject to this stock option are subject to service-based vesting requirements. 1/12th of the shares subject to the option shall vest and become exercisable on the first day of each month following June 16, 2023 beginning on July 1, 2023 such that 100% of the shares subject to this stock option will be vested on June 1, 2024, subject to the Report Person remaining a service provider through each such vesting date. |
Stock Option (right to buy)
|
50,000 |
| 2023-08-31 | Nicol Ronald Lee |
Director |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
The shares subject to this stock option are subject to service-based vesting requirements. 1/12th of the shares subject to the option shall vest and become exercisable on the first day of each month following January 31, 2023 beginning on February 1, 2023 such that 100% of the shares subject to this stock option will be vested on January 1, 2024, subject to the Report Person remaining a service provider through each such vesting date. |
Stock Option (right to buy)
|
18,750 |
| 2023-08-31 | Hughes Lily Yan |
SVP & Chief Legal Officer |
Award↑
Filing footnotes — Stock Option (right to buy) (Direct)
The shares subject to this stock option are subject to service-based vesting requirements. 1/12th of the shares subject to the option shall vest and become exercisable on the first day of each month following January 31, 2023 beginning on February 1, 2023 such that 100% of the shares subject to this stock option will be vested on January 1, 2024, subject to the Report Person remaining a service provider through each such vesting date. |
Stock Option (right to buy)
|
18,750 |
| 2023-08-22 | BOLTON JOHN R |
Director |
Other↑
|
No Securities Owned
|
0 |
| 2023-08-11 | Seldin David |
10% Owner |
Sell↓
Filing footnotes — Common Stock (Direct)
These securities are owned directly by David Seldin, who may be deemed a member of a "group" for purposes of Section 13(d) of the Exchange Act with each of the other Reporting Persons and Mr. Hirsch. The shares were sold in multiple transactions at prices ranging from $0.563 to $0.74, inclusive. This amount represents the weighted average sale price of such transactions. The Reporting Persons undertake to provide full information regarding the number of shares sold at each separate price upon request of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer. |
Common Stock
|
66 |
| 2023-08-11 | Seldin David |
10% Owner |
Sell↓
Filing footnotes — Common Stock (Direct)
These securities are owned directly by CST Global LLC, which may be deemed a member of a "group" for purposes of Section 13(d) of the Exchange Act with each of the other Reporting Persons and Mr. Hirsch. The shares were sold in multiple transactions at prices ranging from $0.563 to $0.74, inclusive. This amount represents the weighted average sale price of such transactions. The Reporting Persons undertake to provide full information regarding the number of shares sold at each separate price upon request of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer. |
Common Stock
|
3 |
| 2023-08-11 | Seldin David |
10% Owner |
Sell↓
Filing footnotes — Common Stock (Direct)
These securities are owned directly by Anzu Nuburu V LLC, which may be deemed a member of a "group" for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended (the "Exchange Act") with each of the other Reporting Persons and Daniel Hirsch. The shares were sold in multiple transactions at prices ranging from $0.563 to $0.74, inclusive. This amount represents the weighted average sale price of such transactions. The Reporting Persons undertake to provide full information regarding the number of shares sold at each separate price upon request of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer. |
Common Stock
|
1,325 |