March 17 (Reuters) - Victory Capital ( VCTR ) submitted a revised offer for rival Janus Henderson ( JHG ) on Tuesday, ratcheting up efforts to derail the asset manager's take-private deal ‌with Nelson Peltz's Trian and venture capital firm General Catalyst.

The move comes days after Janus rejected Victory's $8.6 billion cash-and-stock offer, saying the proposal was not superior to the existing Trian-led deal.

Under the revised proposal, San Antonio-based Victory has boosted the cash consideration.

The firm is now offering $40 in cash and 0.25 of its shares for each Janus share. Victory had earlier offered $30 in cash and 0.35 of its shares.

In December, Janus said it had agreed to a $7.4 billion all-cash buyout by Trian and General Catalyst after a five-year push by Peltz that began as an activist campaign.