Nuburu, Inc.
Nuburu, Inc. (BURU) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · BURU · as of Mar 31, 2025
Ownership Breakdown
12
Institutional Holders
▲ 3 vs Q4
$148,464
Total Inst. Value
▼ $4,128 vs Q4
122.06M
Shares Outstanding
freeFloat 98.75%
787,908
13F Shares Held
▲ 558,568 vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
BURU largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC miscellaneous electrical machinery, equipment & supplies | 370.0K | 1.27% | 1.27% | $69.92M | May 9, 2025 | NEW |
VIRTU FINANCIAL LLC miscellaneous electrical machinery, equipment & supplies | 166.4K | 57.02% | 57.02% | $31.00M | May 12, 2025 | ▲ 166.4K |
GEODE CAPITAL MANAGEMENT, LLC miscellaneous electrical machinery, equipment & supplies | 145.5K | 49.86% | 49.86% | $27.50M | May 13, 2025 | ▲ 13.0K |
UBS GROUP AG miscellaneous electrical machinery, equipment & supplies | 41.1K | 14.08% | 14.08% | $7.77M | May 13, 2025 | ▲ 20.8K |
SQUAREPOINT OPS LLC miscellaneous electrical machinery, equipment & supplies | 30.0K | 10.29% | 10.29% | $5.67M | Aug 27, 2025 | NEW |
SBI SECURITIES CO., LTD. miscellaneous electrical machinery, equipment & supplies | 15.0K | 5.14% | 5.14% | $2.83M | May 2, 2025 | ▲ 13.8K |
COLONY GROUP, LLC miscellaneous electrical machinery, equipment & supplies | 14.2K | 4.86% | 4.86% | $2.68M | May 20, 2025 | NEW |
TOWER RESEARCH CAPITAL LLC (TRC) miscellaneous electrical machinery, equipment & supplies | 4.7K | 1.61% | 1.61% | $890,000 | May 15, 2025 | ▲ 6 |
GROUP ONE TRADING, L.P. miscellaneous electrical machinery, equipment & supplies | 419 | 0.14% | 0.14% | $79,000 | May 14, 2025 | — held |
MORGAN STANLEY miscellaneous electrical machinery, equipment & supplies | 389 | 0.13% | 0.13% | $74,000 | May 15, 2025 | NEW |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
6
Increased
+214.0K shares5
New Positions
first time holders0
Decreased
−0 shares3
Sold Out
fully exitedNet shares change (top 50)
+214.0K
+214.0K / −0
Net new holders
+8
5 new / 3 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
BURU insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
3
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Zamboni Alessandro Co-Chief Executive Officer | Dec 31, 2025 | Purchase | 4,332,525 | $0.35 | $1.50M | 4.33M | Form 4 ↗ |
Zamboni Alessandro Co-Chief Executive Officer | Oct 1, 2025 | Award | 355,511 | — | — | 355.5K | Form 4 ↗ |
Ricchebuono Matteo director | Oct 1, 2025 | Award | 72,500 | $0.14 | $10.3K | 72.5K | Form 4 ↗ |
Barisoni Dario Co-Chief Executive Officer | Oct 1, 2025 | Award | 105,000 | $0.14 | $14.9K | 105.0K | Form 4 ↗ |
Taylor Shawn director | Oct 1, 2025 | Award | 70,000 | $0.14 | $9.9K | 70.0K | Form 4 ↗ |
Seldin David 10 percent owner | Nov 21, 2024 | J-Other | 61,085 | — | — | 67.7K | Form 4 ↗ |
Seldin David 10 percent owner | Nov 21, 2024 | J-Other | 25,544 | — | — | 25.9K | Form 4 ↗ |
Seldin David 10 percent owner | Nov 21, 2024 | J-Other | 5,391 | — | — | 5.6K | Form 4 ↗ |
Seldin David 10 percent owner | Nov 21, 2024 | J-Other | 19,979 | — | — | 0 | Form 4 ↗ |
Hirsch Daniel J. director | Oct 1, 2024 | Award | 13,889 | $0.45 | $6.3K | 13.9K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Nuburu, Inc. (BURU) is primarily owned by institutional investors, who hold approximately 0.7% of total shares outstanding. Company insiders own approximately 1.25%, while retail and public investors account for the remaining 98.10%.
The largest institutional shareholder of Nuburu, Inc. is VANGUARD GROUP INC, holding approximately 369,961 shares — equal to 1.27% of outstanding shares — as of March 31, 2025.
A total of 12 institutional investors currently hold BURU stock, with a combined institutional value of approximately $148,464 as of the most recent 13F filing period.
Frequently asked questions
BURU ownershipNuburu, Inc. (BURU) is primarily owned by institutional investors, who hold approximately 0.7% of shares. The largest shareholder is VANGUARD GROUP INC with a 1.27% stake. Company insiders hold 1.25%. Data sourced from SEC Form 13F as of March 31, 2025.