STOCK TITAN
  1. Home
  2. Sec-filings
  3. ALAB
  4. [Form 4] Astera Labs, Inc. Insider Trading Activity

Astera Labs director sells 183K shares in plan

Director-related entities sold 183,000 Astera Labs shares under a pre-established Rule 10b5-1 trading plan.

Filing Impact
(Very High)
Filing Sentiment
(Very Negative)
Form Type
4

Rhea-AI Filing Summary

Astera Labs, Inc. (ALAB) director Manuel Alba reported that entities associated with him sold a total of 183,000 shares of Common Stock on September 1, 2026. The sales were executed indirectly through the Alba 2003 Living Trust and Casa Alameda 2007, LLC at weighted average prices ranging from about $276.72 to $288.99 per share.

The trades occurred automatically pursuant to a Rule 10b5-1 trading plan adopted on May 22, 2026. After these transactions, Alba also reports indirect ownership of 5,000 shares through his spouse and direct ownership of 2,351 shares, while disclaiming beneficial ownership of the trust and LLC shares except for any pecuniary interest.

Positive

  • None.

Negative

  • None.

Insights

Analyzing...

Insider ALBA MANUEL
Role Director
Sold 183,000 shs ($51.26M)
Type Security Shares Price Value
Sale Common Stock F1, F2, F3 2,575 $277.3203 $714K
Sale Common Stock F1, F4, F3 20,991 $278.3282 $5.84M
Sale Common Stock F1, F5, F3 37,176 $279.2802 $10.38M
Sale Common Stock F1, F6, F3 59,379 $280.0382 $16.63M
Sale Common Stock F1, F7, F3 12,882 $281.158 $3.62M
Sale Common Stock F1, F8, F3 5,870 $282.1283 $1.66M
Sale Common Stock F1, F9, F3 3,954 $283.185 $1.12M
Sale Common Stock F1, F10, F3 2,245 $284.1749 $638K
Sale Common Stock F1, F11, F3 340 $285.175 $97K
Sale Common Stock F1, F12, F3 2,677 $286.9944 $768K
Sale Common Stock F1, F13, F3 1,019 $287.9344 $293K
Sale Common Stock F1, F14, F3 892 $288.9543 $258K
Sale Common Stock F1, F2, F15 568 $277.3195 $158K
Sale Common Stock F1, F4, F15 4,618 $278.3282 $1.29M
Sale Common Stock F1, F5, F15 8,179 $279.2804 $2.28M
Sale Common Stock F1, F6, F15 13,070 $280.0383 $3.66M
Sale Common Stock F1, F7, F15 2,835 $281.1581 $797K
Sale Common Stock F1, F8, F15 1,288 $282.1281 $363K
Sale Common Stock F1, F9, F15 868 $283.184 $246K
Sale Common Stock F1, F10, F15 491 $284.175 $140K
Sale Common Stock F1, F11, F15 74 $285.175 $21K
Sale Common Stock F1, F12, F15 588 $286.996 $169K
Sale Common Stock F1, F13, F15 225 $287.9343 $65K
Sale Common Stock F1, F14, F15 196 $288.9543 $57K
holding Common Stock -- -- --
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 1,124,498 shares (Indirect, By Alba Trust); Common Stock — 253,863 shares (Indirect, By Casa Alameda 2007, LLC); Common Stock — 5,000 shares (Indirect, By spouse); Common Stock — 2,351 shares (Direct)
Footnotes (15)
  1. F1. The sales reported in this Form 4 occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 22, 2026.
  2. F2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $276.7200 to $277.7100, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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. These shares are owned directly by Manuel Alba-Marquez in trust for Alba 2003 Living Trust (the "Alba Trust"), of which the Reporting Person and his spouse are co-trustees. The Reporting Person disclaims beneficial ownership of these securities, except to the extent, if any, of his pecuniary interest therein, and the filing of this Form 4 is not an admission that the Reporting Person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.
  4. F4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $277.7200 to $278.7100, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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.
  5. F5. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $278.7200 to $279.7100, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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.
  6. F6. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $279.7200 to $280.7100, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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. The shares were sold in multiple transactions at prices ranging from $280.7200 to $281.7100, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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. The shares were sold in multiple transactions at prices ranging from $281.7200 to $282.7000, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $282.7200 to $283.7000, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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.
  10. F10. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $283.7200 to $284.7100, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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.
  11. F11. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $284.7600 to $285.5900, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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.
  12. F12. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $286.3600 to $287.3500, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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.
  13. F13. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $287.6400 to $288.4100, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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.
  14. F14. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $288.9400 to $288.9900, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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.
  15. F15. These shares are owned directly by Casa Alameda 2007, LLC, of which the Reporting Person is a manager. The Reporting Person disclaims beneficial ownership of these securities, except to the extent, if any, of his pecuniary interest therein, and the filing of this Form 4 is not an admission that the Reporting Person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.
Shares sold 183,000 shares Total Common Stock sold on September 1, 2026 by entities associated with the director
Sale price range (low) $276.72 per share Lowest end of weighted average price range disclosed in the footnotes
Sale price range (high) $288.99 per share Highest end of weighted average price range disclosed in the footnotes
Rule 10b5-1 plan adoption date May 22, 2026 Date the trading plan governing these sales was adopted
Number of sale transactions 24 transactions Non-derivative sale entries reported for September 1, 2026
Indirect holdings by spouse 5,000 shares Common Stock indirectly owned by the reporting person through spouse after transactions
Direct holdings 2,351 shares Common Stock directly owned by the reporting person after transactions
Rule 10b5-1 trading plan regulatory
"The sales reported ... occurred automatically pursuant to a Rule 10b5-1 trading plan"
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.
beneficial ownership regulatory
"The Reporting Person disclaims beneficial ownership of these securities, except to the extent"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
pecuniary interest financial
"except to the extent, if any, of his pecuniary interest therein"
Section 16 regulatory
"beneficial owner of these securities for purposes of Section 16 or for any other purpose"
Section 16 is a U.S. securities law rule that governs the trading and disclosure obligations of company insiders — typically officers, directors and large shareholders — to promote transparency and deter unfair profit-taking. It requires insiders to publicly report their stock trades and allows companies or the issuer to reclaim quick, short-term profits from certain insider trades, like a scoreboard and a refund policy that help investors see and limit possible insider advantage.

FAQ

What insider transaction did Astera Labs (ALAB) report on this Form 4?
Astera Labs reported that entities associated with director Manuel Alba sold 183,000 shares of Common Stock on September 1, 2026, in multiple open-market transactions at weighted average prices within specified ranges.

At what prices were the ALAB shares sold in Manuel Alba’s September 1, 2026 trades?
The reported sales were at weighted average prices in ranges from about $276.72 to $288.99 per share, with detailed price bands for each trade as described in the transaction footnotes.

Were Manuel Alba’s ALAB stock sales made under a Rule 10b5-1 plan?
Yes. The filing states that the sales occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by Manuel Alba on May 22, 2026.

Who actually owned the ALAB shares sold in this Form 4 filing?
The shares were owned by the Alba 2003 Living Trust and Casa Alameda 2007, LLC. The reporting person disclaims beneficial ownership of these securities except to the extent of any pecuniary interest.

How many Astera Labs (ALAB) shares does Manuel Alba report owning after these sales?
After the reported transactions, Manuel Alba reports indirect ownership of 5,000 shares of Common Stock held by his spouse and 2,351 shares held directly in his own name.

How many separate sale transactions did the ALAB Form 4 disclose for September 1, 2026?
The Form 4 discloses 24 sale transactions of Astera Labs Common Stock on September 1, 2026, plus two holding entries showing post-transaction positions.

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

Form 4 Insider Transactions: What Each Field Means →
See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google
Add on Google
SEC Form 4
FORM 4UNITED 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*
ALBA MANUEL
(Last)(First)(Middle)
C/O ASTERA LABS, INC.
2345 NORTH FIRST STREET
(Street)
SAN JOSE CALIFORNIA 95131
(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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
09/01/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock09/01/2026S(1)2,575D$277.3203(2)1,271,923IBy Alba Trust(3)
Common Stock09/01/2026S(1)20,991D$278.3282(4)1,250,932IBy Alba Trust(3)
Common Stock09/01/2026S(1)37,176D$279.2802(5)1,213,756IBy Alba Trust(3)
Common Stock09/01/2026S(1)59,379D$280.0382(6)1,154,377IBy Alba Trust(3)
Common Stock09/01/2026S(1)12,882D$281.158(7)1,141,495IBy Alba Trust(3)
Common Stock09/01/2026S(1)5,870D$282.1283(8)1,135,625IBy Alba Trust(3)
Common Stock09/01/2026S(1)3,954D$283.185(9)1,131,671IBy Alba Trust(3)
Common Stock09/01/2026S(1)2,245D$284.1749(10)1,129,426IBy Alba Trust(3)
Common Stock09/01/2026S(1)340D$285.175(11)1,129,086IBy Alba Trust(3)
Common Stock09/01/2026S(1)2,677D$286.9944(12)1,126,409IBy Alba Trust(3)
Common Stock09/01/2026S(1)1,019D$287.9344(13)1,125,390IBy Alba Trust(3)
Common Stock09/01/2026S(1)892D$288.9543(14)1,124,498IBy Alba Trust(3)
Common Stock09/01/2026S(1)568D$277.3195(2)286,295IBy Casa Alameda 2007, LLC(15)
Common Stock09/01/2026S(1)4,618D$278.3282(4)281,677IBy Casa Alameda 2007, LLC(15)
Common Stock09/01/2026S(1)8,179D$279.2804(5)273,498IBy Casa Alameda 2007, LLC(15)
Common Stock09/01/2026S(1)13,070D$280.0383(6)260,428IBy Casa Alameda 2007, LLC(15)
Common Stock09/01/2026S(1)2,835D$281.1581(7)257,593IBy Casa Alameda 2007, LLC(15)
Common Stock09/01/2026S(1)1,288D$282.1281(8)256,305IBy Casa Alameda 2007, LLC(15)
Common Stock09/01/2026S(1)868D$283.184(9)255,437IBy Casa Alameda 2007, LLC(15)
Common Stock09/01/2026S(1)491D$284.175(10)254,946IBy Casa Alameda 2007, LLC(15)
Common Stock09/01/2026S(1)74D$285.175(11)254,872IBy Casa Alameda 2007, LLC(15)
Common Stock09/01/2026S(1)588D$286.996(12)254,284IBy Casa Alameda 2007, LLC(15)
Common Stock09/01/2026S(1)225D$287.9343(13)254,059IBy Casa Alameda 2007, LLC(15)
Common Stock09/01/2026S(1)196D$288.9543(14)253,863IBy Casa Alameda 2007, LLC(15)
Common Stock5,000IBy spouse
Common Stock2,351D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. The sales reported in this Form 4 occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 22, 2026.
2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $276.7200 to $277.7100, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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. These shares are owned directly by Manuel Alba-Marquez in trust for Alba 2003 Living Trust (the "Alba Trust"), of which the Reporting Person and his spouse are co-trustees. The Reporting Person disclaims beneficial ownership of these securities, except to the extent, if any, of his pecuniary interest therein, and the filing of this Form 4 is not an admission that the Reporting Person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.
4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $277.7200 to $278.7100, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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.
5. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $278.7200 to $279.7100, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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.
6. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $279.7200 to $280.7100, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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. The shares were sold in multiple transactions at prices ranging from $280.7200 to $281.7100, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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. The shares were sold in multiple transactions at prices ranging from $281.7200 to $282.7000, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $282.7200 to $283.7000, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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.
10. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $283.7200 to $284.7100, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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.
11. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $284.7600 to $285.5900, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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.
12. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $286.3600 to $287.3500, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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.
13. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $287.6400 to $288.4100, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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.
14. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $288.9400 to $288.9900, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. 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.
15. These shares are owned directly by Casa Alameda 2007, LLC, of which the Reporting Person is a manager. The Reporting Person disclaims beneficial ownership of these securities, except to the extent, if any, of his pecuniary interest therein, and the filing of this Form 4 is not an admission that the Reporting Person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.
Remarks:
/s/ Philip Mazzara, Attorney-in-Fact09/03/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR