Shivpal, who is also MLA from the party's bastion of Jaswantnagar, held a "courtesy meeting" with Adityanath for nearly 15 minutes at 5 Kalidas Marg, the official residence of the UP Chief Minister.
Earlier on March 24, Aparna Yadav had met the UP chief minister.
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On March 31, Adityanath had visited a cow shelter run by Aparna Yadav.
The SP got only 47 seats in the 403-member UP Assembly.
Shivpal, the warring uncle of SP chief Akhilesh Yadav, had threatened to form a new party after the polls.
However, Shivpal had recently said any decision on forming a new party was yet to be taken.
"I am with Netaji (Mulayam) and would stay with him," he had said.