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Business Summary
Filings
Ownership
Valuation
Ownership — ATMU
Institutional Holdings
Insider Transactions
US Institutional Ownership
100.0%
Institution
Shares
Value
Ownership %
Change
Filing Date
BlackRock, Inc.
12.39M
$631.0M
15.18%
+5.58M
2026-06-30
FMR LLC
5.32M
$271.0M
6.52%
+378.6K
2026-06-30
VANGUARD PORTFOLIO MANAGEMENT LLC
4.60M
$234.0M
5.64%
+915.4K
2026-06-30
Invesco Ltd.
4.46M
$227.0M
5.46%
+1.11M
2026-06-30
PRICE T ROWE ASSOCIATES INC /MD/
4.39M
$223.0M
5.38%
-98.4K
2026-06-30
VANGUARD CAPITAL MANAGEMENT LLC
3.61M
$184.0M
4.42%
+43.3K
2026-06-30
STATE STREET CORP
3.26M
$166.0M
3.99%
+1.36M
2026-06-30
GOLDMAN SACHS GROUP INC
2.90M
$148.0M
3.56%
-387.2K
2026-06-30
GEODE CAPITAL MANAGEMENT, LLC
2.87M
$146.0M
3.52%
+223.2K
2026-06-30
NEUBERGER BERMAN GROUP LLC
2.42M
$123.0M
2.97%
+1.25M
2026-06-30
T. Rowe Price Investment Management, Inc.
1.78M
$90.0M
2.19%
+203.9K
2026-06-30
Channing Capital Management, LLC
1.73M
$88.0M
2.12%
+340.0K
2026-06-30
Jupiter Topco LLC
1.63M
$83.0M
2.00%
--
2026-06-30
MORGAN STANLEY
1.62M
$82.0M
1.98%
-118.8K
2026-06-30
FIRST TRUST ADVISORS LP
1.59M
$80.0M
1.94%
-616.0K
2026-06-30
DIMENSIONAL FUND ADVISORS LP
1.46M
$74.0M
1.79%
+158.0K
2026-06-30
WELLINGTON MANAGEMENT GROUP LLP
1.45M
$73.0M
1.77%
+59.3K
2026-06-30
WESTWOOD HOLDINGS GROUP INC
1.40M
$71.0M
1.71%
+158.0K
2026-06-30
MANGROVE PARTNERS IM, LLC
1.21M
$61.0M
1.48%
-104.0K
2026-06-30
FRONTIER CAPITAL MANAGEMENT CO LLC
1.16M
$59.0M
1.42%
+415.7K
2026-06-30
Port Capital LLC
1.03M
$52.0M
1.27%
+125.6K
2026-06-30
ROYCE & ASSOCIATES LP
995.2K
$50.0M
1.22%
+217.5K
2026-06-30
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
957.1K
$48.0M
1.17%
+16.4K
2026-06-30
Sixth Street Partners Management Company, L.P.
957.1K
$48.0M
1.17%
--
2026-06-30
Nuveen, LLC
930.5K
$47.0M
1.14%
-514.2K
2026-06-30
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