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.
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Form Type
4
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)
- F1. Shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 1, 2025.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
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.
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.
AI-generated analysis. How Rhea-AI works. Not financial advice.
