Astera Labs, Inc. Common Stock
Astera Labs, Inc. Common Stock (ALAB) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ALAB · as of Mar 31, 2025
Ownership Breakdown
433
Institutional Holders
▼ 32 vs Q4
$5.86B
Total Inst. Value
▼ $6.63B vs Q4
171.41M
Shares Outstanding
freeFloat 81.61%
98.16M
13F Shares Held
▲ 3.86M vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ALAB largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
FMR LLC semiconductors & related devices | 24.12M | 14.78% | 14.78% | $1.44T | May 12, 2025 | ▲ 712.0K |
VANGUARD GROUP INC semiconductors & related devices | 9.30M | 5.70% | 5.70% | $554.78B | May 9, 2025 | ▲ 85.8K |
ALLIANCEBERNSTEIN L.P. semiconductors & related devices | 8.40M | 5.15% | 5.15% | $501.29B | May 15, 2025 | ▲ 4.48M |
BLACKROCK, INC. semiconductors & related devices | 4.65M | 2.85% | 2.85% | $277.63B | May 2, 2025 | ▼ 2.00M |
ATREIDES MANAGEMENT, LP semiconductors & related devices | 4.65M | 2.85% | 2.85% | $277.60B | May 15, 2025 | ▲ 2.82M |
D. E. SHAW & CO., INC. semiconductors & related devices | 3.38M | 2.07% | 2.07% | $201.46B | May 15, 2025 | ▲ 929.4K |
INVESCO LTD. semiconductors & related devices | 1.88M | 1.15% | 1.15% | $112.27B | May 12, 2025 | ▼ 2.18M |
FRED ALGER MANAGEMENT, LLC semiconductors & related devices | 1.56M | 95.59% | 95.59% | $93.09B | May 16, 2025 | ▲ 179.6K |
STATE STREET CORP semiconductors & related devices | 1.54M | 94.31% | 94.31% | $91.84B | May 15, 2025 | ▼ 38.9K |
RENAISSANCE TECHNOLOGIES LLC semiconductors & related devices | 1.43M | 87.42% | 87.42% | $85.13B | May 14, 2025 | ▲ 253.0K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
33
Increased
+18.23M shares3
New Positions
first time holders12
Decreased
−9.75M shares0
Sold Out
fully exitedNet shares change (top 50)
+8.47M
+18.23M / −9.75M
Net new holders
+24
3 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ALAB insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
5
Buy transactions
181
Sell transactions
0.03
Buy/Sell ratio
$2M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Dyckerhoff Stefan A director | Jun 3, 2026 | Sale | 7,314 | $364.25 | $2.66M | 320.8K | Form 4 ↗ |
Dyckerhoff Stefan A director | Jun 3, 2026 | Sale | 1,019 | $365.09 | $372.0K | 319.7K | Form 4 ↗ |
Dyckerhoff Stefan A director | Jun 4, 2026 | Award | 837 | — | — | 61.0K | Form 4 ↗ |
Dyckerhoff Stefan A director | Jun 3, 2026 | Sale | 3,077 | $364.25 | $1.12M | 60.6K | Form 4 ↗ |
Dyckerhoff Stefan A director | Jun 3, 2026 | Sale | 428 | $365.09 | $156.3K | 60.1K | Form 4 ↗ |
Dyckerhoff Stefan A director | Jun 3, 2026 | Sale | 580 | $364.25 | $211.3K | 5.4K | Form 4 ↗ |
Dyckerhoff Stefan A director | Jun 3, 2026 | Sale | 81 | $365.09 | $29.6K | 5.3K | Form 4 ↗ |
Gajendra Sanjay President and COO | May 21, 2026 | Sale | 136,709 | $289.13 | $39.53M | 5.33M | Form 4 ↗ |
Gajendra Sanjay President and COO | May 22, 2026 | Gift | 226,189 | — | — | 5.29M | Form 4 ↗ |
Gajendra Sanjay President and COO | May 21, 2026 | Sale | 137,294 | $290.21 | $39.84M | 5.19M | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Astera Labs, Inc. Common Stock (ALAB) is primarily owned by institutional investors, who hold approximately 57.3% of total shares outstanding. Company insiders own approximately 18.39%, while retail and public investors account for the remaining 24.34%.
The largest institutional shareholder of Astera Labs, Inc. Common Stock is FMR LLC, holding approximately 24.12 million shares — equal to 14.78% of outstanding shares — as of March 31, 2025.
A total of 433 institutional investors currently hold ALAB stock, with a combined institutional value of approximately $5.86 billion as of the most recent 13F filing period.
Frequently asked questions
ALAB ownershipAstera Labs, Inc. Common Stock (ALAB) is primarily owned by institutional investors, who hold approximately 57.3% of shares. The largest shareholder is FMR LLC with a 14.78% stake. Company insiders hold 18.39%. Data sourced from SEC Form 13F as of March 31, 2025.