Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

Ambiq Micro, Inc.

AMBQ · NYSE · CIK 0001500412 · Technology · Semiconductors

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

107 Form 4 transaction lines observed in the same window
75 sales · 32 option, withholding, award, gift or other lines

Last qualifying purchaseNo qualifying purchase is present in the local Form 4 history.

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesHigh
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Esaka FumihideChief Executive Officer
○▼○▼○▼○▼○▼○▼▼○▼
Hanson Scott McLeanChief Technology Officer
○▼○▼○▼○▼▼○▼
Chen Sean ChihhsiangPresident and COO
○▼○▼▼▼○▼
ZHANG KERDirector
○○▼▼
Chen TimothyDirector
▼○
Winzeler Jeffrey GChief Financial Officer
○▼
● Purchase▼ Sale○ Other

Showing the six most active owners; 3 additional owner(s) remain in Form 4 evidence.

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot.—

Recent Form 4 activity

0Purchases
79Sales
40Other Form 4 lines
38SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING75 sale line(s) · context only
OTHER32 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
+19.0%
3M
-18.7%
6M
+139.0%
12M
—

Volatility & liquidity

Volatility
84.7%
Beta
—
Avg daily value
—

Valuation

Market cap
—
P/E
—

Fundamentals

Profit margin
-50.3%
ROE
-22.4%
Industry
Semiconductors

Market data

Price data up to: 2026-10-03 · Price source: OpenBB/yfinance · From SEC filings: Profit margin, ROE · Fiscal year ended: 2025-12-31 · Status: PASS

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
2,441,751
Previous report
2,110,814
Avg daily volume
688,422
Days to cover
3.5

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

No qualifying code P equity purchase is present in the local Form 4 history.

Form 4 evidence

119 transaction lines in the latest 365-day window; 132 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-15Hanson Scott McLeanSale (S)Common Stock7,000USD 51.00USD 357,008SEC filing ↗
2026-10-15Hanson Scott McLeanOption exercise / conversion (M)Common Stock7,000USD 8.12USD 56,840SEC filing ↗
2026-10-15Esaka FumihideSale (S)Common Stock5,000USD 51.00USD 255,017SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-15Hanson Scott McLeanSale (S)Common Stock7,000USD 51.00USD 357,008SEC filing ↗
2026-10-15Hanson Scott McLeanOption exercise / conversion (M)Common Stock7,000USD 8.12USD 56,840SEC filing ↗
2026-10-15Esaka FumihideSale (S)Common Stock5,000USD 51.00USD 255,017SEC filing ↗
2026-10-15Esaka FumihideOption exercise / conversion (M)Common Stock5,000USD 8.12USD 40,600SEC filing ↗
2026-10-14Chen Sean ChihhsiangSale (S)Common Stock15,000USD 51.50USD 772,438SEC filing ↗
2026-10-14Chen Sean ChihhsiangOption exercise / conversion (M)Common Stock15,000USD 8.12USD 121,800SEC filing ↗
2026-10-05Chen Sean ChihhsiangSale (S)Common Stock8,205USD 66.78USD 547,950SEC filing ↗
2026-10-02Winzeler Jeffrey GSale (S)Common Stock5,455USD 69.60USD 379,645SEC filing ↗
2026-10-02Hanson Scott McLeanSale (S)Common Stock8,680USD 69.60USD 604,091SEC filing ↗
2026-10-02Esaka FumihideSale (S)Common Stock16,560USD 69.60USD 1,152,504SEC filing ↗
2026-10-02Chen Sean ChihhsiangSale (S)Common Stock5,802USD 69.60USD 403,794SEC filing ↗
2026-09-15Hanson Scott McLeanSale (S)Common Stock7,000USD 60.28USD 421,952SEC filing ↗
2026-09-15Hanson Scott McLeanOption exercise / conversion (M)Common Stock7,000USD 8.12USD 56,840SEC filing ↗
2026-09-15Esaka FumihideSale (S)Common Stock13,500USD 60.28USD 813,723SEC filing ↗
2026-09-15Esaka FumihideOption exercise / conversion (M)Common Stock13,500USD 8.12USD 109,620SEC filing ↗
2026-09-14Chen Sean ChihhsiangSale (S)Common Stock15,000USD 60.14USD 902,138SEC filing ↗
2026-09-14Chen Sean ChihhsiangOption exercise / conversion (M)Common Stock15,000USD 8.12USD 121,800SEC filing ↗
2026-09-11ZHANG KERSale (S)Common Stock10,000USD 63.44USD 634,404SEC filing ↗
2026-09-11Esaka FumihideSale (S)Common Stock50,000USD 63.36USD 3,168,171SEC filing ↗
2026-09-11Esaka FumihideOption exercise / conversion (M)Common Stock50,000USD 12.60USD 630,000SEC filing ↗
2026-09-04ZHANG KERSale (S)Common Stock185USD 56.92USD 10,530SEC filing ↗
2026-09-04ZHANG KEROption exercise / conversion (M)Common Stock1,785USD 5.88USD 10,496SEC filing ↗
2026-09-04Chen Sean ChihhsiangSale (S)Common Stock15,000USD 57.17USD 857,604SEC filing ↗
2026-09-04Chen Sean ChihhsiangOption exercise / conversion (M)Common Stock15,000USD 8.12USD 121,800SEC filing ↗
2026-09-02Esaka FumihideSale (S)Common Stock11,027USD 56.69USD 625,103SEC filing ↗
2026-09-02Esaka FumihideOption exercise / conversion (M)Common Stock11,027USD 12.60USD 138,940SEC filing ↗
2026-09-01Esaka FumihideSale (S)Common Stock48,973USD 56.39USD 2,761,587SEC filing ↗
2026-09-01Esaka FumihideOption exercise / conversion (M)Common Stock48,973USD 12.60USD 617,060SEC filing ↗
2026-08-31Esaka FumihideSale (S)Common Stock48,500USD 57.44USD 2,785,923SEC filing ↗
2026-08-31Esaka FumihideOption exercise / conversion (M)Common Stock57,771USD 11.55USD 667,435SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerAMBQ
CIK0001500412
SectorTechnology
IndustrySemiconductors Yahoo Finance
SEC SIC3674 Semiconductors & Related Devices
ExchangeNYSE

Data coverage

Local Form 4 history132 transaction lines from 2025-07-29 to 2026-10-15
0 P purchase lines · 79 S sale lines · 53 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.