(Reuters) - APM Human Services International said on Friday it had received a letter of intention from its largest shareholder, Madison Dearborn Capital Partners, to acquire all shares of the employment services firm.

The company, which went on a trading halt last week, requested its trading suspension be extended to April 8 to receive and consider the indicative offer.

(Reporting by John Biju in Bengaluru; Editing by Vijay Kishore)