(Adds: Cato Networks, MFE-MediaForEurope)

September 3 (Reuters) - The following bids, mergers,

acquisitions and disposals were reported by 1330 GMT on

Wednesday:

** Israeli cyber security firm Cato Networks said it was

buying cyber startup Aim Security, its first ever acquisition,

and raising another $50 million in a private funding round.

** MFE-MediaForEurope has secured a stake of above

70% in ProSiebenSat.1 following its takeover bid for

the German broadcaster, sources close to the matter told

Reuters.

** Australia's Steadfast Group has strengthened its U.S.

footprint after acquiring a majority stake in MGA and wholesaler

Novum Underwriting Partners LLC.

** Global Indemnity subsidiary Penn-America Underwriters has

completed the acquisition of Sayata, an AI-enabled digital

distribution marketplace for commercial insurance.

** Skyward Specialty Insurance Group has agreed a $555

million deal to acquire 100% of Apollo Group Holdings Limited

from Alchemy, the Lloyd's insurer's management, employees and

other strategic investors.

(Compiled by Rajarshi Roy and Ateev Bhandari in Bengaluru)