I have a similar situation but with $SOLV WI (spin-off of 3M) But my buy-in is €0. I have no idea how this will be handled for tax purposes if I sell them now. Do I have to pay tax on the entire sale proceeds?
@Dividenden-Sammler 0€ is just nonsense and only shows the laziness of some brokers.
With spin-offs, there are 2 variants that mathematically come to the same result:
1. capital leaves company A to found spin-off B. In other words, the capital invested in A decreases while it is transferred to B. Example: You have 1 share of A at 100€. Spin-off B consists of 25% of A's capital and you receive a share. So you have 1x 75€ A and 1x 25€ B. Together they add up to 100€, which corresponds to your initial invested capital. The €25 is also the buy-in for the new position.
2nd value at the time of entry = tax base. This means that the entire calculation for the real buy-in only takes place at the time of sale and then calculates what is calculated directly at 1.