Ambiq Micro (AMBQ): Kleiner Perkins-affiliated funds reported beneficial ownership of Ambiq Micro common stock as of 09/30/2025. Reported holdings include: KPCB XVI at 1,439,667 shares (7.9%); KPCB XVI Founders Fund at 49,282 shares (0.3%); KPCB XVI Associates at 1,488,949 shares (8.2%); Kleiner Perkins Select Fund at 575,867 shares (3.2%); Kleiner Perkins Select Founders Fund at 17,015 shares (0.1%); and Kleiner Perkins Select Associates at 592,882 shares (3.3%).
Each reporting person lists sole voting and dispositive power over its shares, with notes that managing members (XVI Associates or KP Select Associates, as applicable) may be deemed to have sole power to vote and dispose. The filing is a Schedule 13G, reflecting beneficial ownership positions rather than a sale or issuance.
Positive
None.
Negative
None.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
Ambiq Micro, Inc.
(Name of Issuer)
Common Stock, $0.000001 par value per share
(Title of Class of Securities)
023193105
(CUSIP Number)
09/30/2025
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
SCHEDULE 13G
CUSIP No.
023193105
1
Names of Reporting Persons
Kleiner Perkins Caufield & Byers XVI, LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
1,439,667.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
1,439,667.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,439,667.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
7.9 %
12
Type of Reporting Person (See Instructions)
OO
Comment for Type of Reporting Person: Note to Row 5: 1,439,667 shares, except that KPCB XVI Associates, LLC ("XVI Associates"), the managing member of KPCB XVI, may be deemed to have sole power to vote these shares.
Note to Row 6: See response to row 5.
Note to Row 7: 1,439,667 shares, except that XVI Associates, the managing member of KPCB XVI, may be deemed to have sole power to dispose of these shares.
Note to Row 8: See response to row 7.
SCHEDULE 13G
CUSIP No.
023193105
1
Names of Reporting Persons
KPCB XVI Founders Fund, LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
49,282.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
49,282.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
49,282.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
0.3 %
12
Type of Reporting Person (See Instructions)
OO
Comment for Type of Reporting Person: Note to Row 5: 49,282 shares, except that KPCB XVI Associates, LLC ("XVI Associates"), the managing member of XVI Founders, may be deemed to have sole power to vote these shares.
Note to Row 6: See response to row 5.
Note to Row 7: 49,282 shares, except that XVI Associates, the managing member of XVI Founders, may be deemed to have sole power to dispose of these shares.
Note to Row 8: See response to row 7.
SCHEDULE 13G
CUSIP No.
023193105
1
Names of Reporting Persons
KPCB XVI Associates, LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
1,488,949.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
1,488,949.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,488,949.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
8.2 %
12
Type of Reporting Person (See Instructions)
OO
Comment for Type of Reporting Person: Note to Row 5: 1,488,949 shares, 1,439,667 of which are directly owned by KPCB XVI and 49,282 of which are directly owned by XVI Founders. XVI Associates, the managing member of KPCB XVI and XVI Founders, may be deemed to have sole power to vote these shares.
Note to Row 6: See response to row 5.
Note to Row 7: 1,488,949 shares, 1,439,667 of which are directly owned by KPCB XVI and 49,282 of which are directly owned by XVI Founders. XVI Associates, the managing member of KPCB XVI and XVI Founders, may be deemed to have sole power to dispose of these shares.
Note to Row 8: See response to row 7.
SCHEDULE 13G
CUSIP No.
023193105
1
Names of Reporting Persons
Kleiner Perkins Select Fund, LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
575,867.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
575,867.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
575,867.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
3.2 %
12
Type of Reporting Person (See Instructions)
OO
Comment for Type of Reporting Person: Note to Row 5: 575,867 shares, except that Kleiner Perkins Select Associates, LLC ("KP Select Associates"), the managing member of KP Select, may be deemed to have sole power to vote these shares.
Note to Row 6: See response to row 5.
Note to Row 7: 575,867 shares, except that KP Select Associates, the managing member of KP Select, may be deemed to have sole power to dispose of these shares.
Note to Row 8: See response to row 7.
SCHEDULE 13G
CUSIP No.
023193105
1
Names of Reporting Persons
Kleiner Perkins Select Founders Fund, LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
17,015.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
17,015.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
17,015.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
0.1 %
12
Type of Reporting Person (See Instructions)
OO
Comment for Type of Reporting Person: Note to Row 5: 17,015 shares, except that Kleiner Perkins Select Associates, LLC ("KP Select Associates"), the managing member of KP Select Founders, may be deemed to have sole power to vote these shares.
Note to Row 6: See response to row 5.
Note to Row 7: 17,015 shares, except that KP Select Associates, the managing member of KP Select Founders, may be deemed to have sole power to dispose of these shares.
Note to Row 8: See response to row 7.
SCHEDULE 13G
CUSIP No.
023193105
1
Names of Reporting Persons
Kleiner Perkins Select Associates, LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
592,882.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
592,882.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
592,882.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
3.3 %
12
Type of Reporting Person (See Instructions)
OO
Comment for Type of Reporting Person: Note to Row 5: 592,882 shares, 575,867 of which are directly owned by KP Select and 17,015 of which are directly owned by KP Select Founders. KP Select Associates, the managing member of KP Select and KP Select Founders, may be deemed to have sole power to vote these shares.
Note to Row 6: See response to row 5.
Note to Row 7: 592,882 shares, 575,867 of which are directly owned by KP Select and 17,015 of which are directly owned by KP Select Founders. KP Select Associates, the managing member of KP Select and KP Select Founders, may be deemed to have sole power to dispose of these shares.
Note to Row 8: See response to row 7.
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Ambiq Micro, Inc.
(b)
Address of issuer's principal executive offices:
Ambiq Micro, Inc. 6500 River Place Blvd., Building 7, Austin, TX, 78730
Item 2.
(a)
Name of person filing:
This Schedule is filed by Kleiner Perkins Caufield & Byers XVI, LLC, a Delaware limited liability company, KPCB XVI Founders Fund, LLC, a Delaware limited liability company, KPCB XVI Associates, LLC, a Delaware limited liability company, Kleiner Perkins Select Fund, LLC, a Delaware limited liability company, Kleiner Perkins Select Founders Fund, LLC, a Delaware limited liability company and Kleiner Perkins Select Associates, LLC, a Delaware limited liability company. The foregoing entities are collectively referred to as the "Reporting Persons."
(b)
Address or principal business office or, if none, residence:
The address for each of the Reporting Persons is:
c/o Kleiner Perkins Caufield & Byers, LLC
2750 Sand Hill Road
Menlo Park, California 94025
(c)
Citizenship:
See Row 4 of cover page for each Reporting Person.
(d)
Title of class of securities:
Common Stock, $0.000001 par value per share
(e)
CUSIP No.:
023193105
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
See Row 9 of cover page for each Reporting Person.
(b)
Percent of class:
See Row 11 of cover page for each Reporting Person.
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
See Row 5 of cover page for each Reporting Person.
(ii) Shared power to vote or to direct the vote:
See Row 6 of cover page for each Reporting Person.
(iii) Sole power to dispose or to direct the disposition of:
See Row 7 of cover page for each Reporting Person.
(iv) Shared power to dispose or to direct the disposition of:
See Row 8 of cover page for each Reporting Person.
Item 5.
Ownership of 5 Percent or Less of a Class.
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
Under certain circumstances set forth in the limited liability company agreements of the Reporting Persons, the members of such entities may be deemed to have the right to receive dividends from, or the proceeds from, the sale of shares of the Issuer owned by each such entity of which they are a member.
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
Not Applicable
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
Kleiner Perkins Caufield & Byers XVI, LLC
Signature:
/s/ Susan Biglieri
Name/Title:
Susan Biglieri, CFO of KPCB XVI Associates, LLC
Date:
11/03/2025
KPCB XVI Founders Fund, LLC
Signature:
/s/ Susan Biglieri
Name/Title:
Susan Biglieri, CFO of KPCB XVI Associates, LLC
Date:
11/03/2025
KPCB XVI Associates, LLC
Signature:
/s/ Susan Biglieri
Name/Title:
Susan Biglieri, Chief Financial Officer
Date:
11/03/2025
Kleiner Perkins Select Fund, LLC
Signature:
/s/ Susan Biglieri
Name/Title:
Susan Biglieri, CFO of Kleiner Perkins Select Associates, LLC
Date:
11/03/2025
Kleiner Perkins Select Founders Fund, LLC
Signature:
/s/ Susan Biglieri
Name/Title:
Susan Biglieri, CFO of Kleiner Perkins Select Associates, LLC
Kleiner Perkins-affiliated funds reported beneficial ownership of Ambiq Micro common stock with specific share counts and percentages as of 09/30/2025.
How many Ambiq Micro shares does KPCB XVI report owning?
KPCB XVI reports 1,439,667 shares, representing 7.9% of the class.
What is the largest reported percentage held by any reporting person?
KPCB XVI Associates reports 1,488,949 shares, representing 8.2% of the class.
Do the reporting persons have voting and dispositive power?
Yes. Each lists sole voting and sole dispositive power; related managing members may be deemed to have such power per the notes.
What is the date of the event triggering this filing for AMBQ?
The date of event is 09/30/2025.
Which Ambiq Micro security is covered?
Common Stock, $0.000001 par value per share, CUSIP 023193105.
Who are the reporting entities related to Kleiner Perkins?
KPCB XVI, KPCB XVI Founders Fund, KPCB XVI Associates, Kleiner Perkins Select Fund, Kleiner Perkins Select Founders Fund, and Kleiner Perkins Select Associates.
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