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BURU · Nuburu, Inc.
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BURU Nuburu (BURU) Insider Trading, Ownership & Congress Trades

Semiconductors & Electronics · Miscellaneous electrical machinery, equipment & supplies · CIK 0001814215
Quote by TradingView
SEC filings
Insider buyers, 180 days
0
House members buying, 1 year
0
STOCK Act, US House only, disclosed up to 45 days after the trade
Funds added, last quarter
21
13F, latest reported quarter

Nuburu insider trades (Form 4)

Form 4 buys and sells (codes P and S). Grants, option exercises and conversions excluded.

No insider purchases or sales are on record for Nuburu, Inc. in the period covered. Source: SEC Form 4 filings, as of 2026-10-28.

Insider
Filed
Shares
Value
Since filing
Zamboni Alessandro
Co-Chief Executive Officer
BUY
2026-04-22 SECtraded 2025-12-31
4,332,525
$1.5M
-52.0%
Context
  • First Form 4 purchase or sale (code P or S) here by this insider on our record.
  • The trade is 100.0% of the 4,332,525 shares held after it.
  • No other insider bought within 30 days.
  • 21 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Co-Chief Executive Officer Zamboni Alessandro bought about $1.5M of BURU on Dec 31, 2025, the largest insider purchase at the company on our record; 21 funds added in the latest 13F quarter.
Anzu Nuburu III LLC
SELL
2023-08-11 SEC
527
$364
-99.8%
Context
  • 18 earlier Form 4 trades (code P or S) here by this insider (18 sales), the last on Aug 10, 2023.
  • The trade is 0.0% of the 2,114,451 shares held after it.
  • 1 other insider sold within 30 days.
  • 21 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Insider Anzu Nuburu III LLC sold about $364 of BURU on Aug 11, 2023; 1 other insider sold within 30 days and 21 funds added in the latest 13F quarter.
Anzu Nuburu III LLC
SELL
2023-08-11 SEC
242
$167
-99.8%
Context
  • 18 earlier Form 4 trades (code P or S) here by this insider (18 sales), the last on Aug 10, 2023.
  • The trade is 0.0% of the 972,535 shares held after it.
  • 1 other insider sold within 30 days.
  • 21 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Insider Anzu Nuburu III LLC sold about $167 of BURU on Aug 11, 2023; 1 other insider sold within 30 days and 21 funds added in the latest 13F quarter.
Anzu Nuburu III LLC
SELL
2023-08-11 SEC
199
$137
-99.8%
Context
  • 18 earlier Form 4 trades (code P or S) here by this insider (18 sales), the last on Aug 10, 2023.
  • The trade is 0.0% of the 799,143 shares held after it.
  • 1 other insider sold within 30 days.
  • 21 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Insider Anzu Nuburu III LLC sold about $137 of BURU on Aug 11, 2023; 1 other insider sold within 30 days and 21 funds added in the latest 13F quarter.
Anzu Nuburu III LLC
SELL
2023-08-11 SEC
66
$46
-99.8%
Context
  • 18 earlier Form 4 trades (code P or S) here by this insider (18 sales), the last on Aug 10, 2023.
  • The trade is 0.0% of the 264,346 shares held after it.
  • 1 other insider sold within 30 days.
  • 21 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Insider Anzu Nuburu III LLC sold about $46 of BURU on Aug 11, 2023; 1 other insider sold within 30 days and 21 funds added in the latest 13F quarter.
67 transactions on record
Since filing: total return from the first close after the filing to the latest close, dividend-adjusted. Not a forecast.
Context lines are counts over the filings above and returns from our own price history, never a price level. Not investment advice.
See all insider buying · insider selling
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Seven facts, ranked against the sector · Rank is not a forecast
Insiders
no insider buys or sells on file
Congress
no House purchase disclosed in the last 12 months
Funds
21 funds bought in last quarter
below 82% of Semiconductors & Electronics
Revenue
-100.0% year over year
the lowest in Semiconductors & Electronics
Margin
no margin: no revenue reported
Buybacks
no share repurchases reported
Short interest
18.2% of the float short (float per yahoo 2026-10-27) · 1.0 days to cover · settled 2026-10-15
more than 89% of Semiconductors & Electronics
What changed in the last 30 days
Nothing new filed in the last 30 days

Watch BURU

A free account keeps a watchlist and can send one email a day when insiders, funds or Congress file on the names in it. No password and no card.

The year, with the filings on it
Total return over 12 months. Each marker is a filing; hover or tap one for the detail.
-89.6%12M
-98%-49%+0%+50%2025-102025-122026-022026-042026-062026-082026-10 2025-12-31 · Zamboni Alessandro bought $1.5M
Insider buy
Indexed to 100, dividend-adjusted, not a price chart. When a name files heavily, the largest trades are drawn first.

Who owns BURU: institutional holders (13F)

13F holdings, latest reported quarter
VANGUARD CAPITAL MANAGEMENT LLC
6,724,936 sh
$860.8K
GEODE CAPITAL MANAGEMENT, LLC
1,381,875 sh
$177.0K
UBS Group AG
872,913 sh
$111.7K
VANGUARD FIDUCIARY TRUST CO
856,258 sh
$109.6K
STATE STREET CORP
536,640 sh
$68.7K

Congress trades in BURU

No Congress trades reported
No House member has disclosed a trade in this stock. See what Congress is buying.

Activist and 5% holders (13D/13G)

No 5%+ ownership filings
Nobody has filed for crossing 5%. That is a fact, not missing data.

BURU planned insider sales (Form 144)

No planned-sale notices
No insider has filed to sell. Watch this after a run-up.

BURU mutual fund holders (N-PORT)

Funds ranked by the share of their own portfolio in this stock (N-PORT).
VANGUARD EXTENDED MARKET INDEX FUND
$347.2K position · as of 2026-06-30
0.0%
Fidelity Extended Market Index Fund
$105.8K position · as of 2026-05-31
0.0%
VANGUARD TOTAL STOCK MARKET INDEX FUND
$514.3K position · as of 2026-06-30
0.0%
Fidelity Series Total Market Index Fund
$23.0K position · as of 2026-05-31
0.0%
Fidelity Total Market Index Fund
$16.7K position · as of 2026-05-31
0.0%
SEC N-PORT, monthly, about 60 days late · funds ≥ $10M · % is the share of the fund's own portfolio
Live price
Daily candles from TradingView, under their licence. No filings marked.
Why this name is on the desk
The complete filing record, in one place.
The record shows 21 funds added last quarter. Each figure is a federal filing, dated the day it went public.
Backtest this pattern Open the screener
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Sector by SEC SIC code
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BURU financials

Revenue growth
-100.0%
XBRL, annual
Ratios from the company's XBRL filings, latest filings
Revenue, TTM
$932.6K
four quarters, 2025-07-01 to 2026-06-30
Net margin, TTM
n/a
revenue under $1M, the ratio says nothing
Free cash flow, TTM
-$31.9M
operating cash flow minus capex, 2025-07-01 to 2026-06-30
Debt to equity
6.17x
long-term 2026-06-30 plus current 2026-06-30; equity 2026-06-30
Cash flow to debt
-0.44x
TTM operating cash flow over long-term 2026-06-30 plus current 2026-06-30
Return on equity
n/a
average equity is zero or negative
Return on assets
-157.6%
TTM net income over average of 2025-06-30 and 2026-06-30
Return on invested capital
n/a
pre-tax loss, no effective tax rate to apply
Return on capital employed
n/a
capital employed is zero or negative
P/E, trailing
n/a
trailing loss, a multiple of a loss is not meaningful
Enterprise value
$63.4M
market value at close 2026-10-27 on 2026-08-12 shares, plus long-term 2026-06-30 plus current 2026-06-30, minus cash 2026-06-30
FCF yield
-1,935%
TTM free cash flow over market value at close 2026-10-27
PEG, trailing
n/a
trailing loss, a multiple of a loss is not meaningful
Price as of 2026-10-27. Hover or tap a tile for its yearly and quarterly history.
Method
TTM is four consecutive fiscal quarters; Q4 is the year minus nine months when not filed. Returns use the average of opening and closing balances. EBIT is approximated by operating income. PEG uses trailing EPS growth.
Fundamentals
Annual figures from XBRL filings. Pick a past date to see them as known then.
2025-122024-122023-122022-12
Revenue$0$152.1K$2.1M$1.4M
Gross profit-$181.4K-$2.1M-$3.6M-$3.4M
Operating income-$18.4M-$13.2M-$21.7M-$14.0M
Net income-$79.1M-$34.5M-$20.7M-$29.5M
EPS (diluted)-2.25-29.51-0.63-5.41
Operating cash flow-$16.1M-$6.6M-$17.5M-$10.2M
Cash$24.7M$209.3K$2.1M$2.9M
Long-term debt$25.5M$9.2M$9.1M$22.7M
Buybacksn/an/an/a$302.9M
SEC XBRL, fiscal years, as known on 2026-10-28

BURU Stock Sonar score 4/7 axes

Find similar shapesCompare

BURU ranks highest on institutional and government (18th percentile) and financial health (14th), and lowest on growth (1st), among Semiconductors & Electronics peers.

Financial health
14
Inputs
  • Debt to equity6.17x · 2 pct, sector of 152
  • Cash flow to debt-0.44x · 27 pct, sector of 136
Growth
0
Inputs
  • Revenue growth, YoY-100.0% · 0 pct, sector of 194
  • Backlog growth, YoYno backlog line filed, or no year-earlier backlog
Institutional and government
18
Inputs
  • Funds adding, latest quarter21 · 18 pct, sector of 184
  • Congress net buyers, 365dno Congress trades in 365 days
  • Federal contracts, 180dno federal contracts in 180 days
  • Lobbying spend, 4 quartersno lobbying filings in the last four quarters
Risk and compliance
9
Inputs
  • Short interest, % of float+18.2% · 11 pct, sector of 220
  • Recalls per $1B revenue, 3yrevenue under $50M or not filed, so a count cannot be scaled to size
  • EPA cases per $1B revenue, 5yrevenue under $50M or not filed, so a count cannot be scaled to size
  • New text in Risk Factors, latest 10-K+32.6% · 7 pct, sector of 152
3 not measured: Profitability, Insider conviction, US patents
  • Profitability needs 2 of 4 inputs, 1 present: average equity is zero or negative; capital employed is zero or negative; pre-tax loss, no effective tax rate to apply
  • Insider conviction needs 1 of 2 inputs, 0 present: no Form 4 purchase or sale (code P or S) in 180 days; no insider trades in 180 days
  • US patents needs 1 of 2 inputs, 0 present: patent data not loaded yet

4 of 7 axes scored. Each is a percentile against sector peers (all companies when the sector is thin); higher is better. An unscored axis is unmeasured, not low. How it is scored

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