Astronics Corporation
Astronics Corporation (ATRO) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ATRO · as of Sep 30, 2025
Ownership Breakdown
235
Institutional Holders
▲ 4 vs Q2
$1.33B
Total Inst. Value
▲ $313.26M vs Q2
35.84M
Shares Outstanding
freeFloat 93.63%
29.21M
13F Shares Held
▼ 1.20M vs Q2
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
ATRO largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. aircraft parts & auxiliary equipment, nec | 2.27M | 6.28% | 6.28% | $103.36B | Nov 12, 2025 | ▲ 31.5K |
VANGUARD GROUP INC aircraft parts & auxiliary equipment, nec | 1.94M | 5.37% | 5.37% | $88.31B | Nov 7, 2025 | ▲ 105.3K |
STATE STREET CORP aircraft parts & auxiliary equipment, nec | 1.45M | 4.03% | 4.03% | $66.24B | Nov 14, 2025 | ▼ 49.5K |
CAPITAL INTERNATIONAL INVESTORS aircraft parts & auxiliary equipment, nec | 1.41M | 3.90% | 3.90% | $64.17B | Nov 13, 2025 | NEW |
325 CAPITAL LLC aircraft parts & auxiliary equipment, nec | 1.36M | 3.77% | 3.77% | $62.06B | Nov 14, 2025 | — held |
ACK ASSET MANAGEMENT LLC aircraft parts & auxiliary equipment, nec | 1.23M | 3.41% | 3.41% | $56.10B | Nov 14, 2025 | ▼ 830.0K |
NEXT CENTURY GROWTH INVESTORS LLC aircraft parts & auxiliary equipment, nec | 1.21M | 3.37% | 3.37% | $55.38B | Nov 14, 2025 | ▼ 53.6K |
LUXOR CAPITAL GROUP, LP aircraft parts & auxiliary equipment, nec | 1.16M | 3.20% | 3.20% | $52.70B | Nov 14, 2025 | NEW |
D. E. SHAW & CO., INC. aircraft parts & auxiliary equipment, nec | 882.1K | 2.45% | 2.45% | $40.23B | Nov 14, 2025 | ▲ 33.5K |
UBS GROUP AG aircraft parts & auxiliary equipment, nec | 820.1K | 2.27% | 2.27% | $37.40B | Nov 13, 2025 | NEW |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
22
Increased
+2.09M shares7
New Positions
first time holders20
Decreased
−2.71M shares0
Sold Out
fully exitedNet shares change (top 50)
629.4K
+2.09M / −2.71M
Net new holders
+9
7 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
ATRO insider trading · insider activity
Source: SEC Form 4
19
Buy transactions
14
Sell transactions
1.36
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Davis Julie M Secretary | Mar 3, 2026 | Tax Withhold | 1,472 | $81.35 | $119.7K | 7.5K | Form 4 ↗ |
PEABODY MARK Executive VP & Pres-Aerospace | Mar 3, 2026 | Tax Withhold | 2,642 | $81.35 | $214.9K | 62.4K | Form 4 ↗ |
Hedges Nancy L Principal Accounting Officer | Mar 3, 2026 | Tax Withhold | 1,821 | $81.35 | $148.1K | 32.0K | Form 4 ↗ |
Mulato James Pres Astronics Test Systems | Mar 3, 2026 | Tax Withhold | 2,801 | $81.35 | $227.9K | 35.8K | Form 4 ↗ |
GUNDERMANN PETER J PRESIDENT/CEO | Mar 3, 2026 | Tax Withhold | 3,489 | $81.35 | $283.8K | 94.0K | 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
Astronics Corporation (ATRO) is primarily owned by institutional investors, who hold approximately 81.5% of total shares outstanding. Company insiders own approximately 6.37%, while retail and public investors account for the remaining 12.14%.
The largest institutional shareholder of Astronics Corporation is BLACKROCK, INC., holding approximately 2.27 million shares — equal to 6.28% of outstanding shares — as of September 30, 2025.
A total of 235 institutional investors currently hold ATRO stock, with a combined institutional value of approximately $1.33 billion as of the most recent 13F filing period.
Frequently asked questions
ATRO ownershipAstronics Corporation (ATRO) is primarily owned by institutional investors, who hold approximately 81.5% of shares. The largest shareholder is BLACKROCK, INC. with a 6.28% stake. Company insiders hold 6.37%. Data sourced from SEC Form 13F as of September 30, 2025.