Nextdoor accounting chief sells 40,000 shares

The reported exercise and sale were made under a Rule 10b5-1 plan adopted June 3, 2026.

Rhea-AI Filing Summary

Nextdoor Holdings, Inc. Chief Accounting Officer How Antoinette exercised options covering 40,000 Class B shares at an exercise price of $2.41 per share on September 21, 2026, converted them one-for-one into Class A shares, and sold 40,000 Class A shares at a weighted average $2.6255 per share. The exercise and sale were made under a Rule 10b5-1 plan adopted June 3, 2026. The option entry reports 50,986 options following the exercise.

Insider Trade Summary 10b5-1

Exercise and sale activity reported; no spread calculated

Exercise and Sale 5 txns

Insider How Antoinette

Role Chief Accounting Officer

Sold 40,000 shs ($105K)

Approx. gross sale proceeds $105K

Type	Security	Shares	Price	Value
Exercise	Stock Option (Right to Buy) F1, F3	40,000	$0.00	$0.00
Exercise	Class B Common Stock F4, F1	40,000	$0.00	$0.00
Conversion	Class B Common Stock F4	40,000	$0.00	$0.00
Conversion	Class A Common Stock	40,000	$0.00	$0.00
Sale	Class A Common Stock F1, F2	40,000	$2.6255	$105K

Holdings After Transaction: Stock Option (Right to Buy) — 50,986 contracts (Direct); Class B Common Stock — 0 contracts (Direct); Class A Common Stock — 0 shares (Direct)

Footnotes (4)

1. F1. This transaction was entered into pursuant to and in accordance with the requirements of Rule 10b5-1 under the Securities Exchange Act of 1934, as amended, under a plan adopted by the Reporting Person on June 3, 2026.
2. F2. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.62 to $2.6350 per share, inclusive. 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.
3. F3. The stock option award is fully vested and exercisable.
4. F4. Each share of Class B Common Stock is convertible into one share of Class A Common Stock of the Issuer at the election of the holder any time; provided; however, that each share of Class B Common Stock shall automatically be converted into Class A Common Stock on a one-for-one basis on the earlier of the: (i) tenth anniversary of the completion of the Business Combination or (ii) date specified by the affirmative vote of the holders of two-thirds of the Class B Common Stock then outstanding. In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon any transfer, whether or not for value (subject to certain exceptions).

Key Figures

Options exercised: 40,000 shares Exercise price: $2.41 per share Class A shares sold: 40,000 shares +2 more

5 metrics

Options exercised 40,000 shares Exercise on September 21, 2026

Exercise price $2.41 per share Options exercised on September 21, 2026

Class A shares sold 40,000 shares Sale on September 21, 2026

Weighted average sale price $2.6255 per share Class A shares sold on September 21, 2026

Options following exercise 50,986 shares Reported after the September 21, 2026 exercise

Key Terms

Rule 10b5-1, weighted average price, fully vested and exercisable

3 terms

Rule 10b5-1 regulatory

"pursuant to and in accordance with the requirements of Rule 10b5-1"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

weighted average price financial

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

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

fully vested and exercisable technical

"The stock option award is fully vested and exercisable"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many NXDR shares did How Antoinette sell?

How Antoinette sold 40,000 Class A shares on September 21, 2026, at a weighted average price of $2.6255 per share.

What were the NXDR option exercise terms?

How Antoinette exercised options covering 40,000 Class B shares at $2.41 per share on September 21, 2026; the shares were converted one-for-one into Class A shares.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 09/23/2026 - 04:09 PM Accepted by SEC EDGAR 09/23/2026 - 04:05 PM Learn about SEC filing dates

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).

X

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^*

How Antoinette

(Last) (First) (Middle)

C/O NEXTDOOR HOLDINGS, INC.

420 TAYLOR STREET

(Street)

SAN FRANCISCO CALIFORNIA 94102

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Nextdoor Holdings, Inc. [ NXDR ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/21/2026

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)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	09/21/2026		C		40,000	A	$0	40,000	D
Class A Common Stock	09/21/2026		S(1)		40,000	D	$2.6255(2)	0	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	$2.41	09/21/2026		M(1)			40,000	(3)	03/23/2031	Class B Common Stock	40,000	$0	50,986	D
Class B Common Stock	(4)	09/21/2026		M(1)		40,000		(4)	(4)	Class A Common Stock	40,000	$0(4)	40,000	D
Class B Common Stock	(4)	09/21/2026		C			40,000	(4)	(4)	Class A Common Stock	40,000	$0(4)	0	D

Explanation of Responses:

1. This transaction was entered into pursuant to and in accordance with the requirements of Rule 10b5-1 under the Securities Exchange Act of 1934, as amended, under a plan adopted by the Reporting Person on June 3, 2026.

2. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.62 to $2.6350 per share, inclusive. 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.

3. The stock option award is fully vested and exercisable.

4. Each share of Class B Common Stock is convertible into one share of Class A Common Stock of the Issuer at the election of the holder any time; provided; however, that each share of Class B Common Stock shall automatically be converted into Class A Common Stock on a one-for-one basis on the earlier of the: (i) tenth anniversary of the completion of the Business Combination or (ii) date specified by the affirmative vote of the holders of two-thirds of the Class B Common Stock then outstanding. In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon any transfer, whether or not for value (subject to certain exceptions).

Remarks:

	/s/ Sophia Contreras Schwartz, as Attorney-in-Fact for Reporting Person	09/23/2026
	** 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)