Constellium SE· CSTM

🇺🇸 US · MidBroad USNYSE

Basic Materials Aluminum Website

Price: $25.55
Day: -2.44%
Mkt Cap: $3.46B
52W Range: $14.39 – $36.99
Volume: 2.58M
Beta: 1.55

D55D FrameworkQuarterly Data

Holdings Analysis

Insider activity, institutional flows, and fund ownership.

Smart Money: 3.4 / 5 (Neutral), from 3 of 3 components
Institutions Q2 2026: 400 institutions hold; 264 added, 108 reduced
Insiders Q3 2026: 1 purchase ($40.6K), no sales

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Constellium SE

CSTM|Basic Materials|Aluminum

Current price: $26

Smart Money

Dimension 5 of 5

Insider selling pace · Q3 2026

—

buy-only quarter

Seller breadth · Q3 2026

0 sellers

vs 9.5 avg per quarter

Institutional net breadth · Q2 2026

+233

378 adding vs 145 reducing

Institutional ownership · Q2 2026

88.7%

400 institutions

Insider Selling Pace

Each quarter's selling vs this stock's own trailing 6-quarter average

Light <0.5xRoutineElevated >1.5xHeavy >3xBuying

Institutional Positions

Institutions adding above the line, reducing below, net as a line

NewIncreasedReducedClosedNet

Largest Institutional Holders, Q2 2026

By reported market value, and how each moved in the quarter

Holder

Change

BLACKROCK, INC.

12.8M

-1.6%

BPIFRANCE SA

8.4M

-33.5%

MORGAN STANLEY

6.2M

+92.8%

VANGUARD PORTFOLIO MANAGEMENT LLC

4.4M

+11.4%

AMERICAN CENTURY COMPANIES INC

4.2M

+101.7%

T. ROWE PRICE INVESTMENT MANAGEMENT, INC.

3.0M

-25.0%

ETF & Fund Activity, Q2 2026

How the covering funds split between buying, holding and selling

21 buying67 unchanged22 selling

89 funds held CSTM in Q2 2026, holding 19.2M shares between them, up 7.3% on the quarter.

Largest fund holders

VICTORY PORTFOLIOS674.0K sh

THRIVENT SERIES FUND INC488.1K sh

Bridge Builder Trust274.4K sh

Notable Insider Transactions, Q3 2026

Largest open-market purchases and sales by value in the last eight quarters

Sale · May 1

Hoffmann Philippe

$1.6M

Sale · May 1

Jurkovic Philip Ryan

$1.6M

Sale · Mar 4

Hoffmann Philippe

$1.3M

Insider transactions from SEC Form 4 filings; institutional holdings from quarterly 13F filings, which are reported with a lag and can overlap between filers. 13F: quarterly institutional holdings report · ETF: Exchange-Traded Fund

See the complete picture

The full 5D Framework: Business Quality · Peer Comparison · Valuation · Analyst Sentiment · Smart Money

Explore CSTM on stockoscope.com→

Generated September 22, 2026

For educational purposes only. Not financial advice. Data may be delayed or incomplete.

Smart Money Sentiment

CSTM Smart Money Sentiment Score

A weighted 1-5 sentiment score across three smart money signals.

Smart Money

3.4/5

Neutral

Weighted across 3 components

Component Breakdown (3 of 3 available)

Insider Activity

40% weight

Institutional Flow

50% weight

+36

Fund Flow

10% weight

Overall Smart Money sentiment of 3.4/5 (Neutral) based on a weighted combination of 3 components. Insider activity uses a relative-baseline comparison against the stock's own history; institutional flow tracks position momentum and 13F share changes; fund flow measures ETF / mutual-fund buying vs selling. Higher scores indicate stronger bullish sentiment from professional investors.Last updated September 21, 2026.

Insider Trading Activity

Insider trading analysis comparing the latest quarter against the stock's own historical baseline.

Insider Selling Pace for CSTM

Each quarter's selling vs the stock's own trailing 6-quarter average; 1.0x is typical for this stock. Green triangles mark quarters with insider buying.

Neutral

Light insider buying in Q3 2026

Minor: 1 purchase totaling $40.6K (1.5K shares)

Limited history to compare against

Buying is rare, only seen in 2 of 15 quarters

Net insider flow has improved over recent quarters

—

Selling pace

buy-only quarter

0.00%

Stake sold

of active insiders' holdings

0 sellers

Seller breadth

in Q3 2026

$40.6K

Insider buying

1 buyer in Q3 2026

Notable Recent Transactions, CSTM

Top 8 highest-value insider trades from the last 8 quarters

Hoffmann Philippe

President, A&t

Sell

50,000 shares at $31.92

≈25.8% of their stake at the time

May 1, 2026$1.60M

Jurkovic Philip Ryan

SVP & Chro

Sell

48,784 shares at $32.01

≈22.1% of their stake at the time

May 1, 2026$1.56M

Hoffmann Philippe

President, A&t

Sell

50,000 shares at $26.03

≈36.9% of their stake at the time

Mar 4, 2026$1.30M

Guo Jack Q.

CFO

Sell

41,717 shares at $25.87

≈17.9% of their stake at the time

Mar 10, 2026$1.08M

Brun Nicolas

SVP Pa, Comm & Sust

Sell

26,661 shares at $33.85

≈20.3% of their stake at the time

May 11, 2026$902.47K

Guo Jack Q.

CFO

Sell

25,201 shares at $32.62

≈12.0% of their stake at the time

May 5, 2026$822.06K

Hoffmann Philippe

President, A&t

Sell

30,000 shares at $27.14

≈35.1% of their stake at the time

Mar 4, 2026$814.20K

Jurkovic Philip Ryan

SVP & Chro

Sell

29,900 shares at $25.87

≈12.4% of their stake at the time

Mar 10, 2026$773.51K

Institutional Ownership Analysis

Institutional ownership analysis with position momentum, 13F share flow, and ownership percentage trends.

Institutional Positions for CSTM

Institutions adding (new + increased) above zero, reducing (reduced + closed) below, net as a line

New Increased Reduced Closed Net (adding − reducing)

Bullish Signal

Institutions accumulating in Q2 2026

88.7% institutional ownership

Strong accumulation: 378 institutions adding vs 145 reducing positions

13F shares decreased by 3.2%, a notable change

+233

Net breadth

378 adding vs 145 reducing

Strong accumulation

2.61

Add / reduce ratio

in Q2 2026

+77

New − closed

114 initiated, 37 exited

5 of 10

Top holders adding

largest holders with a known change

Position Changes

Q2 2026: how are institutions adjusting their positions?

+378 growing-145 shrinkingNet: +233

114

264

108

New (114)

Increased (264)

Reduced (108)

Closed (37)

Top Institutional Holders, CSTM

Largest 8 institutional positions by ownership percentage as of Q2 2026

BLACKROCK, INC.

12.8M

$408.0M

Ownership

9.42%

-1.6%

BPIFRANCE SA

8.4M

$267.8M

Ownership

6.19%

-33.5%

MORGAN STANLEY

6.2M

$197.1M

Ownership

4.55%

+92.8%

VANGUARD PORTFOLIO MANAGEMENT LLC

4.4M

$140.0M

Ownership

3.23%

+11.4%

AMERICAN CENTURY COMPANIES INC

4.2M

$134.5M

Ownership

3.11%

+101.7%

T. ROWE PRICE INVESTMENT MANAGEMENT, INC.

3.0M

$95.0M

Ownership

2.19%

-25.0%

STATE STREET CORP

3.0M

$94.2M

Ownership

2.18%

+6.9%

STATE STREET CORP

3.0M

$94.2M

Ownership

2.17%

+6.6%

ETF and Mutual Fund Holdings

ETF and mutual fund activity breakdown showing buying vs selling funds, top fund holders, and detailed holdings.

Fund Activity

Q2 2026: 110 ETFs and mutual funds reporting

21 buying22 sellingNet: -1

Buying (21)

Unchanged (67)

Selling (22)

In total, funds bought 1.8M shares and sold 399.2K this quarter. Each fund counts once in the bar above, whatever the size of its move.

Neutral

Mixed fund activity in Q2 2026

110 ETFs and mutual funds reporting

21 buying vs 22 selling (balanced)

Top Fund Holders, CSTM

Largest 8 ETF and mutual fund positions by shares held, each fund's latest filing

VICTORY PORTFOLIOS

674.0K

Weight

0.50%

Jun 30, 2026No change

THRIVENT SERIES FUND INC

488.1K

Weight

0.50%

Jun 30, 2026Increased

Bridge Builder Trust

274.4K

Weight

0.00%

Jun 30, 2026Increased

HC CAPITAL TRUST

182.6K

Weight

0.32%

Jun 30, 2026No change

AUGUSTAR VARIABLE INSURANCE PRODUCTS FUND INC

75.1K

Weight

0.47%

Jun 30, 2026Decreased

TIMOTHY PLAN

50.3K

Weight

0.89%

Jun 30, 2026Decreased

JOHN HANCOCK INVESTMENT TRUST

49.7K

Weight

0.01%

Jun 30, 2026Increased

CLEARWATER INVESTMENT TRUST

46.6K

Weight

0.39%

Jun 30, 2026Decreased

Constellium SE· CSTM

Holdings Analysis

Insider Trading Activity

1.3Transaction History33Real market purchases and sales onlyShow All Types

Institutional Ownership Analysis

2.4Detailed Holdings140Most recent institutional positions with changes and valuations

ETF and Mutual Fund Holdings

3.3Fund Holdings Details25Most recent ETF and mutual fund holdings with share counts and weights

Search stocks

Holdings Analysis

Insider Trading Activity

1.3Transaction History33Real market purchases and sales onlyShow All Types

Institutional Ownership Analysis

2.4Detailed Holdings140Most recent institutional positions with changes and valuations

ETF and Mutual Fund Holdings

3.3Fund Holdings Details25Most recent ETF and mutual fund holdings with share counts and weights