March 10 (Reuters) - Hochtief AG
* Intention to make a proportional bid
* Intention to make a proportional offer to acquire 3 out of every 8 shares
held by Leighton shareholders for $22.15 cash per share
* If all Leighton shareholders accept offer, co will increase stake in Leighton
from 58.77 percent to maximum of 74.23 percent for total consideration of
about $1.16 billion
* Source text for Eikon
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