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CSTM · Constellium SE · Holdings

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$26.17 +0.18 (+0.69%) At close · Sep 11
Market Cap
$3.56B
Shares
136.15M

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: 387
Total Value: $3,878,191,291
Total Shares: 121,741,073
Showing 1–100 of 397 holdings by value · page 1 of 4

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 387 13F filers · Δ vs Mar 31, 2026
Top Holder
10.5%
Sep 2023 → Jun 2026 · range 10.3% – 14.5%
+0.2 pts
Top 5
29.6%
Sep 2023 → Jun 2026 · range 29.6% – 50.0%
−2.6 pts
Top 10
41.2%
Sep 2023 → Jun 2026 · range 41.2% – 63.1%
−3.7 pts
HHI
291
Sep 2023 → Jun 2026 · range 291 – 585
Broadly held−48

Quarterly Activity

vs Mar 31, 2026
New
111
Increased
149
Decreased
109
Sold Out
37
Unchanged
18
Holder count: +74
Institutional value: +25.6%
Shares held: -3.2%

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 397
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1563411 CUSIP F21107101 13F (30d) 110 filings 110 filers Visit website Investor relations