Akorn, NYSE Euronext, Rockwell Collins, RPX: U.S. Equity Movers

Shares of the following companies had unusual moves in U.S. trading. Stock symbols are in parentheses, and prices are as of 4 p.m. in New York.

99 Cents Only Stores (NDN) rose 9.4 percent, the most since March, to $20.46. Private-equity firm Apollo Global Management LLC may be preparing a bid for the discount-retail chain at as much as $24 a share, the New York Post reported.

Family Dollar Stores Inc. (FDO) , another discount retailer, added 2.7 percent to $53.45.

AAR Corp. (AIR) declined 9.4 percent to $20.52, the lowest price since Oct. 6. The aircraft parts and maintenance provider reported fiscal first-quarter profit excluding some items of 41 cents a share, missing the average analyst estimate by 8.1 percent, according to Bloomberg data.

Akorn Inc. (AKRX) surged 6.8 percent to $9.06, the highest price since October 2000. The pharmaceutical company was rated “buy” in new coverage at Deutsche Bank AG.

Diamond Foods Inc. (DMND) rallied 12 percent to $87.30, a record price. The packaged foods company forecast earnings in 2012 will be at least $3.05 a share, topping a previous prediction of no more than $2.98 and the average analyst estimate of $3.06.

First Solar Inc. (FSLR) slipped the second-most in the Standard & Poor’s 500 Index, sinking 5.4 percent to $85.70. The world’s largest maker of thin-film solar modules had its share- price estimate slashed to $35 from $75 at Axiom Capital Management, which said the company’s business is deteriorating.

Netflix Inc. (NFLX) dropped the most in the S&P 500, losing 8.3 percent to $155.19. The mail-order and online film- rental service was downgraded to “average” from “above average” at Caris & Co., which said the company’s cut in U.S. subscriber forecast is “clearly calling into question NFLX’s ability to prognosticate the overall health of the business.”

NYSE Euronext (NYX) fell 1.5 percent, the most in the 25-company Bloomberg World Exchanges Index, to $27.73. Since the owner of the New York Stock Exchange agreed in February to sell itself in return for equity in Deutsche Boerse, the value of the $9.53 billion agreement has plummeted by 21 percent, according to data compiled by Bloomberg.

Patriot Coal Corp. (PCX) slid 10 percent, the most since Aug. 18, to $12.86. The St. Louis, Missouri-based coal company forecast third-quarter production to be down 450,000 tons.

Research In Motion Ltd. (RIMM) tumbled 19 percent, the most since June 17, to $23.93. The maker of the BlackBerry smartphone missed analysts’ estimates for the second quarter on lower-than-expected sales of phones and the PlayBook tablet computer. Profit, excluding some costs, fell to 80 cents a share, compared with the average analyst prediction of 88 cents. Revenue fell to $4.17 billion, compared with the average estimate of $4.47 billion.

Revlon Inc. (REV) increased 8 percent, the most since Feb.18, to $13.58. The cosmetics maker was raised to “outperform” from “market perform” at BMO Capital Markets. The 12-month share-price estimate is $21.

RPX Corp. (RPXC US) rose 9.5 percent, the most since May 4, to $22.43 and advanced 12 percent earlier. The provider of patent risk management services and its certain shareholders are selling 3 million shares.

St. Joe Co. (JOE US) climbed 6.6 percent to $18.20, the highest price since Aug. 31. The largest landholder in northern Florida agreed to allow Fairholme Capital Management LLC, its biggest shareholder, to buy as much as 50 percent of its outstanding stock.

Stratasys Inc. (SSYS) declined 8.1 percent, the lowest since Aug.18, to $23.01. The maker of software used by the automotive industry to design prototypes was cut to “hold” from “buy” at Needham & Co.

Tyco International Ltd. (TYC) rose 3.1 percent to $43.70, the highest price since Aug. 3. The world’s largest maker of securities systems and Textron Inc. (TXT) may be takeover targets for United Technologies Corp. (UTX) , Reuters reported, citing people with direct knowledge of the matter. United Technologies is seeking financing that may exceed $20 billion for a major U.S. acquisition, a person familiar with the matter said. John Moran, a spokesman for United Technologies, declined to comment. Textron jumped the third-most in the S&P 500, rising 6.8 percent to $18.63.

Other candidates include Rockwell Collins Inc. (COL) and Goodrich Corp. (GR) , Reuters reported. The shares climbed 7.8 percent to $56.21 and 7.4 percent to $92.89, respectively.

To contact the reporter on this story: Nikolaj Gammeltoft in New York at ngammeltoft@bloomberg.net

To contact the editor responsible for this story: Nick Baker at nbaker7@bloomberg.net

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