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AMBQ · Ambiq Micro, Inc.
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AMBQ Ambiq Micro (AMBQ) Insider Trading, Ownership & Congress Trades

Semiconductors & Electronics · Semiconductors & related devices · CIK 0001500412
Quote by TradingView
Form 144 · 16
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
149
13F, latest reported quarter
Conversions, 180 days
27
Codes C/M, not in net · $5.5M priced

What the filings say about AMBQ

Insiders, 180 days
-$38.4M net sold
6 sellers · 56% of sales under a 10b5-1 plan
Planned sales (Form 144), 90 days
$24.6M
16 notices

Ambiq Micro insider trades (Form 4)

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

Over the last 180 days, Ambiq Micro, Inc. insiders sold a net $38.4M of stock across 79 Form 4 purchases and sales, with no insider buying. Source: SEC Form 4 filings, as of 2026-10-28.

Insider
Filed
Shares
Value
Since filing
Hanson Scott McLean
Chief Technology Officer
SELL
2026-10-16 SECtraded 2026-10-15
600
$29.4K
+10.2%
Context
  • 16 earlier Form 4 trades (code P or S) here by this insider (16 sales), the last on Oct 2, 2026.
  • The trade is 0.3% of the 218,946 shares held after it.
  • 3 other insiders sold within 30 days.
  • 149 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Chief Technology Officer Hanson Scott McLean sold about $29.4K of AMBQ under a 10b5-1 plan on Oct 15, 2026; 3 other insiders sold within 30 days and 149 funds added in the latest 13F quarter.
Hanson Scott McLean
Chief Technology Officer
SELL
2026-10-16 SECtraded 2026-10-15
900
$45.1K
+10.2%
Context
  • 16 earlier Form 4 trades (code P or S) here by this insider (16 sales), the last on Oct 2, 2026.
  • The trade is 0.4% of the 218,046 shares held after it.
  • 3 other insiders sold within 30 days.
  • 149 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Chief Technology Officer Hanson Scott McLean sold about $45.1K of AMBQ under a 10b5-1 plan on Oct 15, 2026; 3 other insiders sold within 30 days and 149 funds added in the latest 13F quarter.
Hanson Scott McLean
Chief Technology Officer
SELL
2026-10-16 SECtraded 2026-10-15
3,700
$189.1K
+10.2%
Context
  • 16 earlier Form 4 trades (code P or S) here by this insider (16 sales), the last on Oct 2, 2026.
  • The trade is 1.7% of the 214,346 shares held after it.
  • 3 other insiders sold within 30 days.
  • 149 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Chief Technology Officer Hanson Scott McLean sold about $189.1K of AMBQ under a 10b5-1 plan on Oct 15, 2026; 3 other insiders sold within 30 days and 149 funds added in the latest 13F quarter.
Hanson Scott McLean
Chief Technology Officer
SELL
2026-10-16 SECtraded 2026-10-15
1,800
$93.4K
+10.2%
Context
  • 16 earlier Form 4 trades (code P or S) here by this insider (16 sales), the last on Oct 2, 2026.
  • The trade is 0.8% of the 212,546 shares held after it.
  • 3 other insiders sold within 30 days.
  • 149 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Chief Technology Officer Hanson Scott McLean sold about $93.4K of AMBQ under a 10b5-1 plan on Oct 15, 2026; 3 other insiders sold within 30 days and 149 funds added in the latest 13F quarter.
Esaka Fumihide
Chief Executive Officer
SELL
2026-10-16 SECtraded 2026-10-15
500
$24.6K
+10.2%
Context
  • 21 earlier Form 4 trades (code P or S) here by this insider (21 sales), the last on Oct 2, 2026.
  • The trade is 0.1% of the 448,400 shares held after it.
  • 3 other insiders sold within 30 days.
  • 149 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Chief Executive Officer Esaka Fumihide sold about $24.6K of AMBQ under a 10b5-1 plan on Oct 15, 2026; 3 other insiders sold within 30 days and 149 funds added in the latest 13F quarter.
79 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
Showing the latest few. to see 74 more transactions and use the screener and CSV export. We store only your email; there is no password.
Seven facts, ranked against the sector · Rank is not a forecast
Insiders
net -$38.4M over 180 days
-$22.1M over 90 days
below 78% of Semiconductors & Electronics
Congress
no House purchase disclosed in the last 12 months
Funds
149 funds bought in last quarter
below 51% of Semiconductors & Electronics
Revenue
-4.7% year over year
below 77% of Semiconductors & Electronics
Margin
-50.3% net margin
below 78% of Semiconductors & Electronics
Buybacks
no share repurchases reported
Short interest
12.3% of the float short (float per yahoo 2026-10-27) · 5.7 days to cover · settled 2026-10-15
more than 79% of Semiconductors & Electronics
What changed in the last 30 days
Oct 16President and COO Chen Sean Chihhsiang sold $1.7M under a 10b5-1 plan (12 trades, Oct 2 to Oct 14)
Why it matters
A 10b5-1 plan schedules trades months ahead, so this says little about what the insider thinks today.
Oct 6Chief Executive Officer Esaka Fumihide sold $1.2M (Oct 2)
Oct 6Chief Technology Officer Hanson Scott McLean sold $604.1K (Oct 2)
Oct 5Officer SEAN CHEN filed to sell $3.6M by Oct 5 (Form 144)
Why it matters
A Form 144 is a notice of intent to sell; the sale may not happen, and it says nothing about the price.
Oct 2Officer Fumihide Esaka filed to sell $1.1M by Oct 2 (Form 144)
Why it matters
A Form 144 is a notice of intent to sell; the sale may not happen, and it says nothing about the price.

Watch AMBQ

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.
+80.1%12M
-25%+49%+124%+198%2025-102025-122026-022026-042026-062026-082026-10 2026-05-14 · Esaka Fumihide sold $4.2M2026-09-01 · Esaka Fumihide sold $2.8M2026-09-11 · Esaka Fumihide sold $2.7M2026-05-15 · Chen Sean Chihhsiang sold $2.3M2026-05-27 · Chen Timothy sold $1.9M2026-05-14 · Winzeler Jeffrey G sold $1.8M2026-05-27 · Chen Timothy sold $1.8M2026-05-27 · Chen Timothy sold $1.7M2026-05-15 · Chen Sean Chihhsiang sold $1.7M2026-08-26 · Hanson Scott McLean sold $1.6M2026-08-27 · Hanson Scott McLean sold $1.3M2026-08-31 · Esaka Fumihide sold $886.2K2026-08-31 · Esaka Fumihide sold $796.3K2026-09-04 · Chen Sean Chihhsiang sold $734.9K2026-08-14 · Esaka Fumihide sold $690.2K2026-09-14 · Chen Sean Chihhsiang sold $662.6K2026-10-02 · Esaka Fumihide sold $599.0K2026-09-15 · Esaka Fumihide sold $582.2K2026-09-11 · ZHANG KER sold $576.8K2026-09-02 · Esaka Fumihide sold $543.6K2026-09-11 · Esaka Fumihide sold $505.6K2026-10-02 · Esaka Fumihide sold $491.6K2026-05-14 · Hanson Scott McLean sold $424.5K2026-10-14 · Chen Sean Chihhsiang sold $377.9K2026-10-05 · Chen Sean Chihhsiang sold $365.6K2026-08-14 · Hanson Scott McLean sold $347.8K2026-08-31 · Esaka Fumihide sold $335.5K2026-08-31 · Esaka Fumihide sold $327.4K2026-08-31 · Esaka Fumihide sold $317.7K2026-10-02 · Hanson Scott McLean sold $314.0K2026-01-26 · Hanson Scott McLean sold $310.0K2026-09-15 · Hanson Scott McLean sold $299.6K2026-08-27 · Hanson Scott McLean sold $296.2K2026-05-14 · Hanson Scott McLean sold $267.6K2026-05-27 · Chen Timothy sold $266.2K2026-10-02 · Hanson Scott McLean sold $257.6K2026-01-26 · TAUTGES JOSEPH A sold $241.8K2026-09-15 · Esaka Fumihide sold $225.4K2026-10-14 · Chen Sean Chihhsiang sold $213.7K2026-10-02 · Chen Sean Chihhsiang sold $209.9K2026-10-02 · Winzeler Jeffrey G sold $197.3K2026-10-15 · Hanson Scott McLean sold $189.1K2026-10-05 · SEAN CHEN filed to sell $3.6M2026-10-02 · Jeffrey G. Winzeler filed to sell $377.2K2026-10-02 · Scott McLean Hanson filed to sell $600.2K2026-10-02 · Fumihide Esaka filed to sell $1.1M2026-10-02 · Sean Chihhsiang Chen filed to sell $401.2K2026-09-11 · FUMIHIDE ESAKA filed to sell $3.2M2026-09-11 · KER ZHANG filed to sell $634.4K2026-09-04 · KER ZHANG filed to sell $10.5K2026-09-04 · SEAN CHEN filed to sell $1.7M2026-09-02 · FUMIHIDE (HUMI) ESAKA filed to sell $625.1K2026-09-01 · FUMIHIDE (HUMI) ESAKA filed to sell $2.8M2026-08-31 · FUMIHIDE (HUMI) ESAKA filed to sell $2.0M2026-08-27 · SCOTT HANSON filed to sell $1.6M2026-08-26 · SCOTT HANSON filed to sell $1.6M2026-08-14 · FUMIHIDE ESAKA filed to sell $2.9M2026-08-14 · SCOTT HANSON filed to sell $1.4M
Insider sellForm 144 (planned sale)
Indexed to 100, dividend-adjusted, not a price chart. When a name files heavily, the largest trades are drawn first.

Who owns AMBQ: institutional holders (13F)

13F holdings, latest reported quarter
BlackRock, Inc.
1,380,623 sh
$121.9M
D. E. Shaw & Co., Inc.
983,916 sh
$86.9M
Atreides Management, LP
877,123 sh
$77.4M
STATE STREET CORP
861,979 sh
$76.1M
VANGUARD CAPITAL MANAGEMENT LLC
768,539 sh
$67.9M

Congress trades in AMBQ

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.

AMBQ planned insider sales (Form 144)

Notice of intent to sell, filed before any sale
SEAN CHEN
Filed 2026-10-05
$3.6M
Jeffrey G. Winzeler
Filed 2026-10-02
$377.2K
Scott McLean Hanson
Filed 2026-10-02
$600.2K
Fumihide Esaka
Filed 2026-10-02
$1.1M
Sean Chihhsiang Chen
Filed 2026-10-02
$401.2K

AMBQ mutual fund holders (N-PORT)

Funds ranked by the share of their own portfolio in this stock (N-PORT).
Templeton Global Smaller Companies Fund
$22.8M position · as of 2026-05-31
2.8%
Buffalo Early Stage Growth Fund
$1.9M position · as of 2026-06-30
2.6%
Pear tree essex environmental opportunities fund
$764.3K position · as of 2026-06-30
2.3%
Small-Cap Growth Portfolio
$7.3M position · as of 2026-06-30
1.2%
Goldman Sachs Small Cap Growth Fund
$5.6M position · as of 2026-05-31
1.2%
Wasatch Micro Cap Fund
$7.1M position · as of 2026-06-30
1.1%
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
Insiders have filed to sell, before selling.
The record shows a net $38.4M sold by insiders over 180 days, 149 funds added last quarter, $24.6M in planned Form 144 sales. Each figure is a federal filing, dated the day it went public.
Backtest this pattern Open the screener
Same sector, ranked by filing activity
Sector by SEC SIC code
NVDACRDOVICRMPWRALABPIMTSIMUCRCTAIPAVGOAMD

AMBQ financials

Revenue growth
-4.7%
XBRL, annual
Net margin
-50.3%
Ratios from the company's XBRL filings, latest filings
Revenue, TTM
$97.9M
four quarters, 2025-07-01 to 2026-06-30
Net margin, TTM
-37.8%
net income over revenue, 2025-07-01 to 2026-06-30
Free cash flow, TTM
n/a
capex not filed for the four quarters
Debt to equity
n/a
no debt line filed
Cash flow to debt
n/a
no debt line filed
Return on equity
-75.9%
TTM net income over average of 2025-06-30 and 2026-06-30
Return on assets
-14.1%
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
-17.5%
operating income (EBIT proxy) over average of 2025-06-30 and 2026-06-30 minus current liabilities
P/E, trailing
n/a
trailing loss, a multiple of a loss is not meaningful
Enterprise value
n/a
no debt line filed
FCF yield
n/a
capex not filed for the four quarters
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.
2025-122024-12
Revenue$72.5M$76.1M
Gross profit$32.1M$24.3M
Operating income-$39.5M-$40.6M
Net income-$36.5M-$39.7M
EPS (diluted)-4.57-113.50
Operating cash flow-$19.7M-$21.4M
Cash$140.3M$61.0M
SEC XBRL, fiscal years, as known on 2026-10-28

AMBQ Stock Sonar score 5/7 axes

Find similar shapesCompare

AMBQ ranks highest on institutional and government (49th percentile) and risk and compliance (24th), and lowest on insider conviction (14th), among Semiconductors & Electronics peers.

ProfitGrowthInsidersInstitutionsRisk
Profitability
23
Inputs
  • Return on equity-75.9% · 12 pct, sector of 154
  • Return on assets-14.1% · 30 pct, sector of 171
  • Return on invested capitalpre-tax loss, no effective tax rate to apply
  • Return on capital employed-17.5% · 28 pct, sector of 155
Growth
23
Inputs
  • Revenue growth, YoY-4.7% · 23 pct, sector of 194
  • Backlog growth, YoYno backlog line filed, or no year-earlier backlog
Insider conviction
14
Inputs
  • Net Form 4 buying (codes P and S), 180d-$23.7M · 28 pct, sector of 146
  • Insider buyers, 180d0 · 0 pct, sector of 150
Institutional and government
49
Inputs
  • Funds adding, latest quarter149 · 49 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
24
Inputs
  • Short interest, % of float+12.3% · 24 pct, sector of 220
  • Recalls per $1B revenue, 3ynot measured for this sector, almost no peer has an event
  • EPA cases per $1B revenue, 5ynot measured for this sector, almost no peer has an event
  • New text in Risk Factors, latest 10-Kneeds two 10-Ks with a Risk Factors section (not 20-F filers or stubs)
2 not measured: Financial health, US patents
  • Financial health needs 1 of 2 inputs, 0 present: no debt line filed
  • US patents needs 1 of 2 inputs, 0 present: patent data not loaded yet

5 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

AMBQ filings, in plain words

Are Ambiq Micro insiders buying or selling AMBQ?

In the 180 days to 2026-10-28, Ambiq Micro insiders were net sellers, a net $38.4M across purchases and sales reported on Form 4, by 6 sellers.

Are there planned insider sales of AMBQ?

Yes. 16 Form 144 notices of planned insider sales were filed in the 90 days to 2026-10-28, covering $24.6M of stock; the latest, by SEAN CHEN, was filed 2026-10-05.

Read the full summary

In the 180 days to 2026-10-28, Ambiq Micro insiders were net sellers of AMBQ, a net $38.4M across purchases and sales reported on Form 4 by 6 sellers. 56% of the 75 insider sales were made under a Rule 10b5-1 plan; the rest were not flagged as planned. Insiders filed 16 Form 144 notices of intent to sell in the 90 days to 2026-10-28, covering $24.6M of stock. Each figure is counted from SEC and House filings as of 2026-10-28, dated the day the filing was made public.

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