Michèle Katja AmmannDeclared Swiss shareholdings
Michèle Katja Ammann: 2 Swiss companies with a declared holding, including Mikron Holding AG, The Swatch Group AG. Latest filing: 09.12.2025.
- Estimated value (CHF)
- …
- Swiss companies held
- 2
- Largest position
- 56,13 %
- Mikron Holding AG
- 12-month trend
- Stable
- 0 rate rises · 0 rate falls
- Latest filing
- 09.12.2025
- Active since 2025
Declared Swiss portfolio
Latest declared rate per company
Sector allocation
Share of companies heldHow to read these figures?
Rates come from the 6 official filings published by SIX Exchange Regulation. A filing is only required when a threshold is crossed (3, 5, 10, 15, 20, 25, 33⅓, 50, 66⅔%): the actual position may have changed since.
Estimated value = shares held per the latest filing × latest CHF closing price. It is an indicative order of magnitude: the position may have changed without a new threshold being crossed, and holdings without a share count or a CHF price are not valued. Each company's mini-chart traces the successive declared rates.
This profile shows only what the declarant published. No external data is added to it.
Group structure
Shareholding disclosures are often filed jointly by several entities of the same group. The registry links them together: "Controls" lists the group entities declared alongside this shareholder, "Controlled by" the head entities. The figure is the number of joint disclosures, followed by the date of the most recent one.
Show group structure7 controls
Controls
Group entities linked to this shareholder in joint disclosures.
- AFC Beteiligungen AG3 · 06.12.2025
- Ammann Group Holding AG Bern2 · 26.04.2025
- Erbengemeinschaft Nicolas G. Hayek1 · 09.12.2025
- Hayek Holding AG1 · 09.12.2025
- Wat Holding AG1 · 09.12.2025
- Caisse de pensions Swatch Group1 · 09.12.2025
- Ammann Group Holding AG1 · 09.12.2025
This mapping reflects observed disclosures; it does not necessarily indicate permanent legal control.
Disclosure behaviour
Upward and downward threshold crossings show direction, without measuring daily trades below legal thresholds.
90 days · Upward crossings
0
visible history: 6
90 days · Downward crossings
0
visible history: 0
Nature of disclosed positions
Derivatives, sale positions or lending may indicate a more complex strategy than a long equity holding.
Latest shareholding disclosures
The Swatch Group AG
Michèle Katja Ammann · Group of shareholders
Mikron Holding AG
Michèle Katja Ammann · Group of shareholders
Mikron Holding AG
Michèle Katja Ammann · Group of shareholders
Show 3 older disclosures
Mikron Holding AG
Michèle Katja Ammann · Group of shareholders
Mikron Holding AG
Michèle Katja Ammann · Group of shareholders
Mikron Holding AG
Michèle Katja Ammann · Group of shareholders
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Management purchases in this portfolio
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These figures aggregate public disclosures. They are not investment advice.
Common questions
Which Swiss companies are in Michèle Katja Ammann’s disclosed portfolio?
Mikron Holding AG, The Swatch Group AG.
What is Michèle Katja Ammann’s latest disclosure?
The latest available disclosure was published on 09.12.2025 and concerns The Swatch Group AG. Threshold disclosures do not describe every purchase or sale.
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Recent insider purchases
What are insiders doing at companies disclosed by this shareholder?
All purchases this weekInsider barometer
Compare insider purchases and sales across the Swiss stock exchange over 30 days.
View the Swiss barometerThese signals are not investment advice.