Astera Labs (ALAB) director sells 12,499 shares and receives RSU grant

Rhea-AI Filing Summary

Astera Labs director Stefan Dyckerhoff reported a mix of stock sales and an equity grant. Entities associated with him, including a trust and a limited partnership, sold a total of 12,499 shares of Astera Labs common stock on June 3, 2026 at weighted average prices of $364.246 and $365.087 per share, under a pre-arranged Rule 10b5-1 trading plan adopted on December 1, 2025. After these transactions, individual records show continued substantial direct and indirect holdings through these entities.

On June 4, 2026, Dyckerhoff also received an award of 837 restricted stock units that will vest on the earlier of the first anniversary of the grant date or the next annual stockholder meeting, subject to continued service. Following the grant, he directly holds 60,971 shares of common stock, with additional indirect holdings held through various trusts and partnerships in which he has a pecuniary interest.

Insights

Equity compensation and insider-trading analyst

Pre-planned sales and a small RSU grant show routine portfolio management.

The data show 12,499 Astera Labs shares sold on June 3, 2026 across direct holdings and related entities such as trusts and a limited partnership. Footnotes state these sales were executed under a Rule 10b5-1 trading plan adopted on December 1, 2025, indicating they were pre-scheduled rather than opportunistic.

Alongside these sales, Stefan Dyckerhoff received 837 restricted stock units on June 4, 2026, which vest after about one year or at the next annual stockholder meeting, contingent on continued service. After the transactions, he retains 60,971 shares directly plus additional indirect holdings via the trusts and partnership, suggesting the net effect is a modest reduction within a larger ongoing position.

Because the sales are both limited in scale relative to remaining holdings and conducted under a pre-arranged plan, they typically signal routine diversification and liquidity management. The RSU grant under the 2024 Stock Option and Incentive Plan continues aligning director compensation with equity performance, without indicating a major shift in the company’s outlook based solely on this filing.

Insider Trade Summary 10b5-1

Net Seller: 12,499 shares ($4,553,996)

Net Sell 12 txns

Insider Dyckerhoff Stefan A

Role null

Sold 12,499 shs ($4.55M)

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	837	$0.00	--
Sale	Common Stock	3,077	$364.246	$1.12M
Sale	Common Stock	7,314	$364.246	$2.66M
Sale	Common Stock	580	$364.246	$211K
Sale	Common Stock	428	$365.087	$156K
Sale	Common Stock	1,019	$365.087	$372K
Sale	Common Stock	81	$365.087	$30K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 60,971 shares (Direct, null); Common Stock — 320,751 shares (Indirect, By Trust)

Footnotes (1)

1. Shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 1, 2025. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $363.395 to $364.35 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. 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. 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. 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $365.00 to $365.49 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. These shares represent an award of restricted stock units (RSUs) granted on June 4, 2026 (the Grant Date) under the Astera Labs, Inc. 2024 Stock Option and Incentive Plan. Such award vests in full upon the earlier of (i) the first anniversary of the Grant Date or (ii) the date of the next annual stockholder meeting of the Issuer following the Grant Date, subject to the Reporting Person's continuous service relationship with the Issuer through such vesting date. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. 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 total: 12,499 shares Weighted average sale price 1: $364.246/share Weighted average sale price 2: $365.087/share +4 more

7 metrics

Shares sold total 12,499 shares Net shares sold across entities on June 3, 2026

Weighted average sale price 1 $364.246/share Portion of June 3, 2026 open-market sales

Weighted average sale price 2 $365.087/share Portion of June 3, 2026 open-market sales

RSU grant size 837 RSUs Award granted June 4, 2026 under 2024 plan

Direct holdings after grant 60,971 shares Common stock held directly following June 4, 2026 award

Trust holdings after sale 320,751 shares Common stock held by trust after one sale line

Limited partnership holdings after sale 5,373 shares Common stock held by limited partnership after one sale line

Key Terms

Rule 10b5-1 trading plan, restricted stock units (RSUs), pecuniary interest, irrevocable trust, +2 more

6 terms

Rule 10b5-1 trading plan regulatory

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

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.

restricted stock units (RSUs) financial

"These shares represent an award of restricted stock units (RSUs) granted on June 4, 2026 under the Astera Labs, Inc. 2024 Stock Option and Incentive Plan."

Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.

pecuniary interest financial

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

irrevocable trust financial

"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.

limited partnership financial

"Shares held by a limited partnership of which the Reporting Person is a trustee of a trust which is the general partner."

A limited partnership is a legal business structure with two types of partners: at least one general partner who runs the business and bears full legal responsibility, and one or more limited partners who contribute money, share profits, and have liability capped at their investment. For investors, it matters because it separates control from financial exposure — like putting money into a store without managing it — and affects how returns, risks, taxes and transferability of ownership are handled.

Astera Labs, Inc. 2024 Stock Option and Incentive Plan financial

"Award of RSUs granted under the Astera Labs, Inc. 2024 Stock Option and Incentive Plan."

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Form 4 Insider Transactions: What Each Field Means →

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)
06/03/2026

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	06/03/2026		S(1)		3,077	D	$364.246(2)	60,562	D(3)
Common Stock	06/03/2026		S(1)		7,314	D	$364.246(2)	320,751	I	By Trust(4)
Common Stock	06/03/2026		S(1)		580	D	$364.246(2)	5,373	I	By Limited Partnership (TF)(5)
Common Stock	06/03/2026		S(1)		428	D	$365.087(6)	60,134	D(3)
Common Stock	06/03/2026		S(1)		1,019	D	$365.087(6)	319,732	I	By Trust(4)
Common Stock	06/03/2026		S(1)		81	D	$365.087(6)	5,292	I	By Limited Partnership (TF)(5)
Common Stock	06/04/2026		A		837(7)	A	$0	60,971	D(3)
Common Stock								3,767	I	By DIFT-2(8)
Common Stock								3,765	I	By DIFT-AMD(8)
Common Stock								3,765	I	By DIFT-BAD(8)
Common Stock								3,765	I	By DIFT-SHD(8)
Common Stock								3,765	I	By DIFT-IND(8)

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 $363.395 to $364.35 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 $365.00 to $365.49 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. These shares represent an award of restricted stock units (RSUs) granted on June 4, 2026 (the Grant Date) under the Astera Labs, Inc. 2024 Stock Option and Incentive Plan. Such award vests in full upon the earlier of (i) the first anniversary of the Grant Date or (ii) the date of the next annual stockholder meeting of the Issuer following the Grant Date, subject to the Reporting Person's continuous service relationship with the Issuer through such vesting date. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock.

8. 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	06/05/2026
	** 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)

FAQ

What insider transactions did Astera Labs (ALAB) disclose for Stefan Dyckerhoff?

Astera Labs disclosed that entities associated with director Stefan Dyckerhoff sold 12,499 shares of common stock on June 3, 2026 at weighted average prices around $364–$365 per share. He also received 837 restricted stock units on June 4, 2026 that vest based on continued service.

Were the Astera Labs (ALAB) insider stock sales pre-planned under Rule 10b5-1?

Yes. A footnote states the shares were sold under a Rule 10b5-1 trading plan adopted on December 1, 2025. Such plans schedule trades in advance, so the timing of these June 2026 sales reflects a preset program rather than a discretionary market-timing decision.

How many Astera Labs (ALAB) shares does Stefan Dyckerhoff hold after these transactions?

After the reported transactions, Stefan Dyckerhoff holds 60,971 Astera Labs common shares directly. Additional indirect holdings are reported in various trusts and a limited partnership where he has a pecuniary interest, so his overall economic exposure exceeds the directly held amount noted in the filing.

What are the terms of the 837 RSUs granted to the Astera Labs (ALAB) director?

The 837 restricted stock units were granted on June 4, 2026 under the 2024 Stock Option and Incentive Plan. They vest in full on the earlier of the first anniversary of the grant date or the next annual stockholder meeting, subject to Dyckerhoff’s continuous service with Astera Labs.

At what prices were the Astera Labs (ALAB) shares sold in these insider transactions?

The filing reports weighted average sale prices of $364.246 and $365.087 per share. Footnotes explain that actual sale prices ranged from $363.395 to $365.49 across multiple trades, and detailed breakdowns are available from the issuer upon request.