Astera Labs director sells 12.5K shares in plan

A director of Astera Labs reported pre-planned open-market sales totaling 12,499 ALAB shares across direct and trust-related holdings.

Rhea-AI Filing Summary

Astera Labs, Inc. (ALAB) director Stefan A. Dyckerhoff reported selling a total of 12,499 shares of common stock on September 2, 2026, in open-market transactions at weighted average prices between about $273 and $277 per share. The sales were made pursuant to a Rule 10b5-1 trading plan adopted on December 1, 2025. Portions of the shares were held directly, while others were held indirectly through a trust and a limited partnership, and certain indirect positions and irrevocable trusts are reported with the filer disclaiming beneficial ownership except for his pecuniary interest.

Insider Trade Summary 10b5-1

Net Seller: 12,499 shares

Net Sell 17 txns

Insider Dyckerhoff Stefan A

Role Director

Sold 12,499 shs ($3.44M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2, F3	273	$273.643	$75K
Sale	Common Stock F1, F2, F4	650	$273.643	$178K
Sale	Common Stock F1, F2, F5	52	$273.643	$14K
Sale	Common Stock F1, F6, F3	2,275	$274.789	$625K
Sale	Common Stock F1, F6, F4	5,409	$274.789	$1.49M
Sale	Common Stock F1, F6, F5	429	$274.789	$118K
Sale	Common Stock F1, F7, F3	785	$275.533	$216K
Sale	Common Stock F1, F7, F4	1,867	$275.533	$514K
Sale	Common Stock F1, F7, F5	148	$275.533	$41K
Sale	Common Stock F1, F8	172	$276.752	$48K
Sale	Common Stock F1, F8, F4	407	$276.752	$113K
Sale	Common Stock F1, F8, F5	32	$276.752	$9K
holding	Common Stock F9	--	--	--
holding	Common Stock F9	--	--	--
holding	Common Stock F9	--	--	--
holding	Common Stock F9	--	--	--
holding	Common Stock F9	--	--	--

Holdings After Transaction: Common Stock — 50,456 shares (Direct); Common Stock — 294,733 shares (Indirect, By Trust); Common Stock — 3,309 shares (Indirect, By Limited Partnership (TF)); Common Stock — 3,767 shares (Indirect, By DIFT-2); Common Stock — 3,765 shares (Indirect, By DIFT-AMD); Common Stock — 3,765 shares (Indirect, By DIFT-BAD); Common Stock — 3,765 shares (Indirect, By DIFT-SHD); Common Stock — 3,765 shares (Indirect, By DIFT-IND)

Footnotes (9)

1. F1. Shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 1, 2025.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $273.27 to $274.04 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. Includes shares to be issued in connection with the vesting of one or more restricted stock units. The Reporting Person shares pecuniary interest in these shares with other parties pursuant to contractual relationships. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest in these shares.
4. F4. Shares held by a trust of which the Reporting Person is a Trustee. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.
5. F5. Shares held by a limited partnership of which the Reporting Person is a trustee of a trust which is the general partner. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.
6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $274.07 to $275.05 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.
7. F7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $275.15 to $276.05 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.
8. F8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $276.29 to $277.12 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.
9. F9. Shares held by an irrevocable trust of which the Reporting Person is a Trustee. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

Key Figures

Shares sold: 12,499 shares Weighted average sale price group 1: $273.643 per share Weighted average sale price group 2: $274.789 per share +5 more

8 metrics

Shares sold 12,499 shares Total common stock sales reported on September 2, 2026

Weighted average sale price group 1 $273.643 per share Sales with individual prices from $273.27 to $274.04

Weighted average sale price group 2 $274.789 per share Sales with individual prices from $274.07 to $275.05

Weighted average sale price group 3 $275.533 per share Sales with individual prices from $275.15 to $276.05

Weighted average sale price group 4 $276.752 per share Sales with individual prices from $276.29 to $277.12

Rule 10b5-1 plan adoption date December 1, 2025 Trading plan governing the reported sales

Indirect holding by DIFT-2 3,767 shares Common stock held indirectly by irrevocable trust DIFT-2

Indirect holdings by each of DIFT-AMD, DIFT-BAD, DIFT-SHD, DIFT-IND 3,765 shares each Common stock held indirectly by four separate irrevocable trusts

Key Terms

Rule 10b5-1 trading plan, weighted average price, restricted stock units, pecuniary interest, +1 more

5 terms

Rule 10b5-1 trading plan regulatory

"Shares were sold pursuant to a Rule 10b5-1 trading plan adopted"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted average price financial

"The price reported 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.

restricted stock units financial

"Includes shares to be issued in connection with the vesting of one or more restricted stock units."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

pecuniary interest financial

"The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest"

irrevocable trust technical

"Shares held by an irrevocable trust of which the Reporting Person is a Trustee."

An irrevocable trust is a legal arrangement where an owner transfers assets into a separate entity managed by a trustee and gives up the power to modify or reclaim those assets. For investors it matters because putting stock or other holdings into such a trust can change who controls and benefits from the assets, affect taxes and creditor protection, and influence how easy it is to sell or value those holdings—like placing valuables in a locked safe overseen by someone else.

FAQ

How many Astera Labs (ALAB) shares did Stefan A. Dyckerhoff sell in this Form 4?

He reported selling a total of 12,499 shares of Astera Labs common stock on September 2, 2026, according to the transaction summary, across multiple open-market sale transactions.

What were the sale prices for the ALAB shares reported by the director?

The reported sales used weighted average prices of $273.643, $274.789, $275.533, and $276.752 per share, with underlying trade prices ranging from $273.27 to $277.12 across the different transaction groups.

Was the ALAB insider sale made under a Rule 10b5-1 trading plan?

Yes. A footnote states the shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 1, 2025, and the filing’s 10b5-1 checkbox is affirmed.

Were all ALAB shares sold held directly by the director?

No. Some shares were held directly, while others were held indirectly through a trust and a limited partnership. Footnotes explain that beneficial ownership of these indirect holdings is disclaimed except for the reporting person’s pecuniary interest.

What ALAB share holdings are reported for the DIFT trusts?

The filing lists indirect holdings of 3,767 shares by DIFT-2 and 3,765 shares each by DIFT-AMD, DIFT-BAD, DIFT-SHD, and DIFT-IND. These are described as shares held by an irrevocable trust where the reporting person is a trustee, with beneficial ownership disclaimed except for pecuniary interest.

What role does Stefan A. Dyckerhoff have at Astera Labs (ALAB)?

He is identified as a director of Astera Labs, Inc. in the Form 4 reporting these transactions.

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Available on EDGAR 09/03/2026 - 07:08 PM Accepted by SEC EDGAR 09/03/2026 - 07:07 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^*

Dyckerhoff Stefan A

(Last) (First) (Middle)

755 PAGE MILL ROAD, SUITE A-200

(Street)

PALO ALTO CALIFORNIA 94304-1005

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Astera Labs, Inc. [ ALAB ]

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)
09/02/2026

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
Common Stock	09/02/2026		S(1)		273	D	$273.643(2)	53,688	D(3)
Common Stock	09/02/2026		S(1)		650	D	$273.643(2)	302,416	I	By Trust(4)
Common Stock	09/02/2026		S(1)		52	D	$273.643(2)	3,918	I	By Limited Partnership (TF)(5)
Common Stock	09/02/2026		S(1)		2,275	D	$274.789(6)	51,413	D(3)
Common Stock	09/02/2026		S(1)		5,409	D	$274.789(6)	297,007	I	By Trust(4)
Common Stock	09/02/2026		S(1)		429	D	$274.789(6)	3,489	I	By Limited Partnership (TF)(5)
Common Stock	09/02/2026		S(1)		785	D	$275.533(7)	50,628	D(3)
Common Stock	09/02/2026		S(1)		1,867	D	$275.533(7)	295,140	I	By Trust(4)
Common Stock	09/02/2026		S(1)		148	D	$275.533(7)	3,341	I	By Limited Partnership (TF)(5)
Common Stock	09/02/2026		S(1)		172	D	$276.752(8)	50,456	D
Common Stock	09/02/2026		S(1)		407	D	$276.752(8)	294,733	I	By Trust(4)
Common Stock	09/02/2026		S(1)		32	D	$276.752(8)	3,309	I	By Limited Partnership (TF)(5)
Common Stock								3,767	I	By DIFT-2(9)
Common Stock								3,765	I	By DIFT-AMD(9)
Common Stock								3,765	I	By DIFT-BAD(9)
Common Stock								3,765	I	By DIFT-SHD(9)
Common Stock								3,765	I	By DIFT-IND(9)

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

Explanation of Responses:

1. Shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 1, 2025.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $273.27 to $274.04 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. Includes shares to be issued in connection with the vesting of one or more restricted stock units. The Reporting Person shares pecuniary interest in these shares with other parties pursuant to contractual relationships. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest in these shares.

4. Shares held by a trust of which the Reporting Person is a Trustee. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

5. Shares held by a limited partnership of which the Reporting Person is a trustee of a trust which is the general partner. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $274.07 to $275.05 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.

7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $275.15 to $276.05 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.

8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $276.29 to $277.12 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.

9. Shares held by an irrevocable trust of which the Reporting Person is a Trustee. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

	/s/ Kanwalpreet S. Kalra, Attorney-in-Fact	09/03/2026
	** 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)