NEW YORK ( TheStreet) -- Apollo Group ( APOL) was among the most active names in a very busy after-hours session on Monday after the private education company topped Wall Street expectations for its quarterly results.

The company, which operates the University of Phoenix, reported an adjusted profit of $238.9 million, or $1.63 per share, for its fiscal first quarter ended Nov. 30, on revenue of $1.33 billion, ahead of the average estimate of analysts polled by Thomson Reuters for earnings of $1.35 a share on revenue of $1.26 billion. Apollo said new degreed enrollment fell to 56,500 for the quarter from 98,100 in the same period a year earlier.

The for-profit education stocks were roiled during Monday's regular session after Strayer Education ( STRA) issued a weak student enrollment outlook. Apollo's stock fell more than 5% in regular trades but it was last quoted at $38.02, up 5.8%, on volume of 3.3 million, according to

The news helped other stocks in the sector bounce as Corinthian Colleges ( COCO) rose 2.8% to $4.71 on volume of around 520,000; Career Education Corp. ( CECO) advanced 2.6% to $19.10 on volume of 13,000; and ITT Educational Services ( ESI) gained 2.3% to $57.80 on volume of 18,000.

St. Joe Co.

Shares of St. Joe Co. ( JOE) fell sharply in late trades after the Florida-based real estate developer disclosed it's the subject of an "informal inquiry" by the Securities and Exchange Commission.

In a Form 8-K filing with the SEC, the company said the regulatory agency is looking into its policies and practices "concerning impairment of investment in real estate assets." St. Joe is cooperating with the probe.

The stock was last quoted at $20.83, down 9.7%, on volume of around 65,000. Based on a regular session close at $23.07, the shares had fallen nearly 40% since hitting a 52-week high of $37.44 in late April.

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