Ambiq (AMBQ) director’s entity sells 70,592 shares in open-market trades

Q: How many Ambiq Micro (AMBQ) shares did the director-linked entity sell?

The entity associated with director Timothy Chen sold 70,592 shares of Ambiq Micro common stock. These were open-market sales grouped into several transactions, with each group reported at a weighted-average price and detailed price ranges disclosed in the footnotes.

Q: At what prices were the Ambiq Micro (AMBQ) shares sold in this Form 4?

The reported sales used weighted average prices per share, including $78.85 , $79.72 , $80.61 , and $81.57 . Footnotes explain that each figure covers multiple trades within narrower price ranges, with exact breakdowns available upon request.

Q: Who actually sold the Ambiq Micro (AMBQ) shares reported for Timothy Chen?

The sales were made by Triumph Way Investment Inc. , an entity through which the holdings are reported. A footnote states that Timothy Chen exercises sole voting and dispositive control over the shares held by Triumph Way Investment Inc., tying the activity to him as reporting person.

Q: How many Ambiq Micro (AMBQ) shares does Timothy Chen hold after these transactions?

After the reported activity, Timothy Chen directly holds 47,618 shares of Ambiq Micro common stock. The filing also reflects indirect holdings through Triumph Way Investment Inc., though only the direct post-transaction share count is clearly summarized in the holding entry.

Q: What type of insider transactions are disclosed for Ambiq Micro (AMBQ) on May 27, 2026?

The Form 4 reports open-market sales of Ambiq Micro common stock coded as “S” transactions. All four sale entries are non-derivative, and the transaction summary shows 70,592 shares sold with a net-sell direction and no option exercises or gifts.

Q: Are the Ambiq Micro (AMBQ) sale prices in the Form 4 exact or averaged?

The sale prices are reported as weighted average sale prices for groups of trades. Footnotes clarify that each group includes multiple transactions within specified price ranges, and that full per-trade pricing details can be provided to investors or regulators upon request.

Filing Impact

(Very High)

Filing Sentiment

(Very Negative)

Form Type

Rhea-AI Filing Summary

Ambiq Micro, Inc. director Timothy Chen reported a series of open-market sales of the company’s common stock on May 27, 2026. In total, an entity named Triumph Way Investment Inc., over which Chen exercises sole voting and dispositive control, sold 70,592 shares at weighted-average prices ranging from about $78 to $82 per share.

Following these transactions, Chen continues to hold 47,618 Ambiq Micro shares directly, according to the filing. The sales were executed in multiple trades at different prices within specified ranges, with full price details available on request from the company or the SEC staff.

Insights

Director-linked entity sells 70,592 Ambiq shares while Chen retains a direct stake.

The filing shows an entity associated with director Timothy Chen, Triumph Way Investment Inc., completed open-market sales totaling 70,592 shares of Ambiq Micro common stock on May 27, 2026. Reported weighted-average prices span roughly $78 to just over $81 per share across four sale groupings.

Chen retains 47,618 shares in a direct position after these transactions, indicating he still has meaningful equity exposure, though the filing does not quantify his prior holdings. The trades are standard open-market sales, with no derivatives exercised and no remaining derivative positions listed in this report.

The price fields are disclosed as weighted averages, and the filing notes that more granular trade data by exact price level is available upon request. Subsequent company filings may provide additional context on Chen’s overall ownership trend and any future insider activity.

Insider Trade Summary

Net Seller: 70,592 shares ($5,632,525)

Net Sell 5 txns

Insider Chen Timothy

Role null

Sold 70,592 shs ($5.63M)

Type	Security	Shares	Price	Value
Sale	Common Stock	22,414	$78.85	$1.77M
Sale	Common Stock	24,248	$79.72	$1.93M
Sale	Common Stock	20,666	$80.61	$1.67M
Sale	Common Stock	3,264	$81.57	$266K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 48,178 shares (Indirect, By: Triumph Way Investment Inc.); Common Stock — 47,618 shares (Direct, null)

Footnotes (1)

The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $78.29 to $79.26 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The Reporting Person exercises sole voting and dispositive control over the shares held by Triumph Way Investment Inc. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $79.30 to $80.28 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $80.30 to $81.27 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $81.325 to $81.755 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Key Figures

Total shares sold: 70,592 shares Direct holdings after transactions: 47,618 shares Weighted average sale price group 1: $78.85 per share +5 more

8 metrics

Total shares sold 70,592 shares Open-market sales on May 27, 2026

Direct holdings after transactions 47,618 shares Common stock held directly by Timothy Chen after reported activity

Weighted average sale price group 1 $78.85 per share Non-derivative sale of 22,414 shares

Weighted average sale price group 2 $79.72 per share Non-derivative sale of 24,248 shares

Weighted average sale price group 3 $80.61 per share Non-derivative sale of 20,666 shares

Weighted average sale price group 4 $81.57 per share Non-derivative sale of 3,264 shares

Sell transactions count 4 transactions Non-derivative sales coded “S”

Net buy/sell direction Net-sell of 70,592 shares Transaction summary for this Form 4

Key Terms

open-market sale, weighted average sale price, voting and dispositive control, indirect ownership, +1 more

5 terms

open-market sale financial

"transaction_action: "open-market sale" for non-derivative stock sales"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

weighted average sale price financial

"The reported price in Column 4 is a weighted average sale price."

voting and dispositive control financial

"The Reporting Person exercises sole voting and dispositive control over the shares"

indirect ownership financial

"Ownership type marked as indirect with nature "By: Triumph Way Investment Inc.""

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Form 4 Insider Transactions: What Each Field Means →

05/29/2026 - 07:51 PM

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Chen Timothy

(Last)

(First)

(Middle)

C/O AMBIQ MICRO, INC.

6500 RIVER PLACE BLVD., BUILDING 7 SUITE

(Street)

AUSTIN

TEXAS

78730

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Ambiq Micro, Inc. [ AMBQ ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/27/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/27/2026		S		22,414	D	$78.85⁽¹⁾	48,178	I	By: Triumph Way Investment Inc.⁽²⁾
Common Stock	05/27/2026		S		24,248	D	$79.72⁽³⁾	23,930	I	By: Triumph Way Investment Inc.⁽²⁾
Common Stock	05/27/2026		S		20,666	D	$80.61⁽⁴⁾	3,264	I	By: Triumph Way Investment Inc.⁽²⁾
Common Stock	05/27/2026		S		3,264	D	$81.57⁽⁵⁾	0	I	By: Triumph Way Investment Inc.⁽²⁾
Common Stock								47,618	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $78.29 to $79.26 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

2. The Reporting Person exercises sole voting and dispositive control over the shares held by Triumph Way Investment Inc.

3. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $79.30 to $80.28 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

4. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $80.30 to $81.27 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

5. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $81.325 to $81.755 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

	/s/ Jeffrey Winzeler, Attorney-in-Fact	05/29/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

How many Ambiq Micro (AMBQ) shares did the director-linked entity sell?

The entity associated with director Timothy Chen sold 70,592 shares of Ambiq Micro common stock. These were open-market sales grouped into several transactions, with each group reported at a weighted-average price and detailed price ranges disclosed in the footnotes.

At what prices were the Ambiq Micro (AMBQ) shares sold in this Form 4?

The reported sales used weighted average prices per share, including $78.85, $79.72, $80.61, and $81.57. Footnotes explain that each figure covers multiple trades within narrower price ranges, with exact breakdowns available upon request.

Who actually sold the Ambiq Micro (AMBQ) shares reported for Timothy Chen?

The sales were made by Triumph Way Investment Inc., an entity through which the holdings are reported. A footnote states that Timothy Chen exercises sole voting and dispositive control over the shares held by Triumph Way Investment Inc., tying the activity to him as reporting person.

How many Ambiq Micro (AMBQ) shares does Timothy Chen hold after these transactions?

After the reported activity, Timothy Chen directly holds 47,618 shares of Ambiq Micro common stock. The filing also reflects indirect holdings through Triumph Way Investment Inc., though only the direct post-transaction share count is clearly summarized in the holding entry.

What type of insider transactions are disclosed for Ambiq Micro (AMBQ) on May 27, 2026?

The Form 4 reports open-market sales of Ambiq Micro common stock coded as “S” transactions. All four sale entries are non-derivative, and the transaction summary shows 70,592 shares sold with a net-sell direction and no option exercises or gifts.

Are the Ambiq Micro (AMBQ) sale prices in the Form 4 exact or averaged?

The sale prices are reported as weighted average sale prices for groups of trades. Footnotes clarify that each group includes multiple transactions within specified price ranges, and that full per-trade pricing details can be provided to investors or regulators upon request.