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AAMI · Acadian Asset Management Inc.

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$92.11 +1.26 (+1.39%)
Market Cap
$3.22B
Shares
35.49M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 301
Total Value: $2,574,473,487
Total Shares: 36,003,280

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 301 13F filers · Δ vs Mar 31, 2026
Top Holder
16.2%
Sep 2023 → Jun 2026 · range 16.2% – 25.0%
−5.3 pts
Top 5
40.4%
Sep 2023 → Jun 2026 · range 40.4% – 57.0%
−6.5 pts
Top 10
54.7%
Sep 2023 → Jun 2026 · range 54.7% – 70.0%
−4.7 pts
HHI
552
Sep 2023 → Jun 2026 · range 552 – 998
Broadly held−198

Quarterly Activity

vs Mar 31, 2026
New
68
Increased
100
Decreased
97
Sold Out
23
Unchanged
36
Holder count: +45
Institutional value: +31.6%
Shares held: +0.1%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 301
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1748824 CUSIP 10948W103 13F (30d) 274 filings 269 filers Visit website Investor relations