EdgeMarketInstruments › CSTM

CSTM — CONSTELLIUM SE

US Materials Steel & metals equity mkt cap 3.6B
27.04 +1.92% today
USD · as of 2026-08-21

Price · 2024-08-26 → 2026-08-21

499 daily closes shown
52w low 13.73 · high 36.15

Anonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2016-01-04.

Performance

1 day+1.92%
1 week-8.65%
1 month-9.87%
3 months-15.61%
6 months+6.29%
Year to date+36.77%
1 year+87.78%
3 years+59.34%
5 years+35.13%

Technicals

RSI 1442.5
vs 50-day avg-10.26%
vs 200-day avg+3.83%
Volatility 1y46.9%
Max drawdown 1y-26.61%
Avg volume 30d1.6M
Daily bars held2,674
History from2016-01-04

Measured signals that fired on CSTM

datesignal measured base rate
2026-08-20Bollinger bandwidth breaks out of its own compression
structure
-0.63% over 21 days · t = -2.80 · n = 7,196
statistically distinguishable from its control group
2026-08-19Fair value gap, bearish
structure
-0.45% over 21 days · t = -3.29 · n = 108,591
statistically distinguishable from its control group
2026-08-05Fair value gap, bullish
structure
-0.67% over 21 days · t = -6.43 · n = 111,973
statistically distinguishable from its control group
2026-08-03Equal lows taken out
structure
-0.64% over 21 days · t = -4.75 · n = 55,661
statistically distinguishable from its control group
2026-07-16Equal lows taken out
structure
-0.64% over 21 days · t = -4.75 · n = 55,661
statistically distinguishable from its control group
2026-05-15Fair value gap, bearish
structure
-0.45% over 21 days · t = -3.29 · n = 108,591
statistically distinguishable from its control group

Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →

Insider transactions (Form 4)

dateinsiderwhatshares pricevalue
2026-08-03Deslarzes Jean-Christophe
Director
Open-market purchase1.5K27.2440.6K
2026-07-10Joerg Ingrid
CEO
Shares withheld for tax3.0K29.2887.4K
2026-06-04Ormerod John
Director
Open-market sale8.0K35.01280.1K
2026-05-28Becker Marcus
SVP CPO
Open-market sale10.4K34.93363.0K
2026-05-14Jarrett Martin
SVP Chief Innovation Officer
Open-market sale4.7K33.46157.8K
2026-05-14Soultz Bradley Lee
Director
Open-market purchase2.5K33.8484.6K
2026-05-12Piquier Ludovic
SVP Manuf Excellence & CTO
Open-market sale1.0K33.5733.6K
2026-05-11Brun Nicolas
SVP PA, Comm & Sust
Open-market sale26.7K33.85902.5K
2026-05-08Corre Stephane
President, AS&I
Open-market sale5.0K33.52167.6K
2026-05-05Guo Jack Q.
EVP & CFO
Open-market sale25.2K32.62822.1K

Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →

Largest institutional holders

managervalueshares
BlackRock, Inc.318.7M13.0M
Bpifrance SA309.6M12.6M
FMR LLC171.1M7.0M
VANGUARD PORTFOLIO MANAGEMENT LLC96.5M3.9M
MILLENNIUM MANAGEMENT LLC85.3M3.5M
D. E. Shaw & Co., Inc.79.5M3.2M
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP79.3M3.2M
MORGAN STANLEY78.6M3.2M
Nuveen, LLC69.5M2.8M
STATE STREET CORP67.9M2.8M

13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →

Short selling

Avg short volume, 90d36.7% of tape
Days observed61

This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →

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