CONSTELLIUM SE (CSTM) Institutional Ownership and Insiders Activity
CONSTELLIUM SE (CSTM) is widely held by institutional investors, with 373 firms reporting positions valued at approximately $3.81B based on SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is the largest disclosed holder, reporting approximately $408.01M in CSTM holdings in its latest filing.
Recent insider activity includes 2 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.
Institutional Holders
373
Total Reported Value
$3.81B
Largest Holder
Blackrock, Inc.
Largest Position
$408.01M
Insider Transactions (90d)
2
Latest Filing Quarter
Q2 2026
New Institutional Positions
113
Funds Exiting Positions
45
Top Institutional Owners
View allInvestorReported Balance
- Blackrock, Inc.$408.01M
- Bpifrance Sa$267.83M
- Morgan Stanley$197.06M
- Vanguard Portfolio Management Llc$139.97M
- American Century Companies Inc$134.52M
Related CSTM Institutional Insights:
- CSTM 13F Institutional Holders
- CSTM Superinvestors
- CSTM Institutional Ownership Changes
- Basic Materials Sector Institutional Ownership
- Basic Materials Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Basic Materials Stocks By Institutional Investors
- Most Sold Basic Materials Stocks By Institutional Investors
- CSTM Insider Trading & SEC Form 4 Activity
- CSTM Articles
- Top Institutional Investor Stock Rankings