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Overview
Financials
Chart
Business Summary
Filings
Ownership
Valuation
Ownership — ATRO
Institutional Holdings
Insider Transactions
US Institutional Ownership
87.1%
Institution
Shares
Value
Ownership %
Change
Filing Date
BlackRock, Inc.
2.83M
$188.0M
7.91%
+27.0K
2026-03-31
STATE STREET CORP
2.35M
$156.0M
6.58%
+517.6K
2026-03-31
AMERICAN CENTURY COMPANIES INC
1.74M
$115.0M
4.86%
-26.7K
2026-03-31
VANGUARD CAPITAL MANAGEMENT LLC
1.39M
$92.0M
3.89%
--
2026-03-31
Capital International Investors
1.29M
$86.0M
3.61%
-560.9K
2026-03-31
UBS Group AG
1.11M
$74.0M
3.11%
+9.1K
2026-03-31
GEODE CAPITAL MANAGEMENT, LLC
887.0K
$59.0M
2.48%
+130.6K
2026-03-31
Pertento Partners LLP
815.3K
$54.0M
2.28%
--
2026-03-31
NEXT CENTURY GROWTH INVESTORS LLC
786.3K
$52.0M
2.20%
-281.3K
2026-03-31
DIMENSIONAL FUND ADVISORS LP
673.8K
$44.0M
1.89%
+34.0K
2026-03-31
D. E. Shaw & Co., Inc.
608.4K
$40.0M
1.70%
+115.0K
2026-03-31
Point72 Asset Management, L.P.
570.6K
$38.0M
1.60%
+73.4K
2026-03-31
Capital World Investors
560.9K
$37.0M
1.57%
--
2026-03-31
TORONTO DOMINION BANK
494.4K
$32.0M
1.38%
+365.8K
2026-03-31
RAYMOND JAMES FINANCIAL INC
492.8K
$31.0M
1.38%
+57.0K
2026-03-31
GOLDMAN SACHS GROUP INC
455.1K
$30.0M
1.27%
+140.4K
2026-03-31
AMERIPRISE FINANCIAL INC
450.7K
$30.0M
1.26%
+194.8K
2026-03-31
EMERALD ADVISERS, LLC
449.1K
$29.0M
1.26%
+206.4K
2026-03-31
MORGAN STANLEY
447.5K
$29.0M
1.25%
-104.2K
2026-03-31
Nuveen, LLC
401.3K
$26.0M
1.12%
-2.5K
2026-03-31
HENNESSY ADVISORS INC
377.8K
$25.0M
1.06%
-13.1K
2026-03-31
BNP PARIBAS FINANCIAL MARKETS
371.0K
$24.0M
1.04%
-73.4K
2026-03-31
VANGUARD PORTFOLIO MANAGEMENT LLC
366.0K
$24.0M
1.02%
--
2026-03-31
ROYCE & ASSOCIATES LP
363.4K
$24.0M
1.02%
-157.2K
2026-03-31
Fisher Asset Management, LLC
348.8K
$23.0M
0.98%
+288.2K
2026-03-31
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