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.

Agilent Technologies Inc. (A) rose 4.1 percent, the most since Jan. 3, to $40.51. The maker of scientific-testing equipment reported earnings in the second quarter were 78 cents a share, topping the average analyst estimate by 5 cents.

American Science & Engineering Inc. (ASEI) fell 24 percent to $51.21 in its biggest slide since 1993. The maker of x-ray equipment for security inspections reported fourth-quarter earnings of 15 cents a share, missing the average analyst estimate by 82 percent, the most since at least 2005, according to data compiled by Bloomberg.

Arctic Cat Inc. (ACAT) dropped 10 percent, the most since July 2010, to $37.97. The snowmobile maker forecast full- year sales of $650 million at most. That missed the average analyst estimate of $659.7 million in a Bloomberg survey.

Avon Products Inc. (AVP) fell 9.7 percent, the most in the Standard & Poor’s 500 Index, to $18.71. Coty Inc. withdrew its $10.7 billion offer for the world’s largest door-to-door cosmetics seller, citing Avon’s “unwillingness to engage in discussions.”

Cellcom Israel Ltd. (CEL) tumbled 14 percent to $9.02, the lowest price since it went public in February 2007. Israel’s largest mobile-phone company posted a 43 percent decline in first-quarter profit amid concern competition will force the company to cut prices.

Dick’s Sporting Goods Inc. (DKS) jumped 6 percent, the most since Jan. 12, to $50.05. The largest publicly traded U.S. athletics store boosted its full-year sales forecast.

Dynavox Inc. (DVOX) fell 26 percent to $1.61, the lowest intraday price since its initial public offering in April 2010. The seller of speech software for people with learning disabilities reported third-quarter earnings that missed analysts’ estimates and said it will stop providing a forecast.

FriendFinder Networks Inc. (FFN) rallied 21 percent, the most since Feb. 8, to $1.29. The owner of Penthouse magazine, which is affiliated with about 250,000 dating and pornographic websites, said new adult subscriptions rose 2.5 percent in the first quarter from a year earlier.

Groupon Inc. (GRPN) rallied 3.7 percent to $12.17, the highest price since April 25. The largest daily coupon site reported first-quarter profit that topped analysts’ estimates, helped by lower marketing costs and expanded international sales.

Home Depot Inc. (HD) had the second-biggest retreat in the Dow Jones Industrial Average, losing 2.4 percent to $48.67. The largest U.S. home-improvement retailer reported first- quarter sales that trailed analysts’ projections after shoppers shied away from larger home projects.

Lakeland Industries Inc. (LAKE) fell 21 percent, the most since 1992, to $8. The Ronkonkoma, New York-based protective work clothing maker said it was ordered to pay $9 million in damages in a decision in a Brazilian arbitration proceeding involving the company and two former officers.

Millennial Media Inc. (MM) slumped 13 percent to $13.40, the lowest price since it went public in March. The second- largest mobile-advertising company forecast sales in 2012 will be no more than $176 million, falling short of the average analyst estimate of $202.8 million.

Opnet Technologies Inc. (OPNT) advanced 24 percent, the most since 2002, to $27.35. The software maker reported fourth- quarter earnings of 21 cents a share, beating the average analyst estimate by 1 cent.

Patriot Coal Corp. (PCX) slumped 18 percent to $3.94, the lowest price since April 2009. The coal producer cut the forecast it made a week ago for sales of steelmaking coal mined in Appalachia because of a potential default by a customer.

Other coal stocks fell. Alpha Natural Resources Inc. (ANR) slipped 9.4 percent to $11.92. Peabody Energy Corp. (BTU) lost 6.8 percent to $26.10.

Summer Infant Inc. (SUMR) tumbled 33 percent, the most since it went public in May 2005, to $3.20. The Woonsocket, Rhode Island-based infant health and safety products company reported first-quarter sales of $58.5 million, trailing the average analyst estimate of $65 million in a Bloomberg survey.

TJX Companies Inc. (TJX) rose the most in the S&P 500, climbing 6.9 percent to $42.45. The discount clothing seller increased its full-year earnings forecast.

To contact the reporter on this story: Whitney Kisling in New York at wkisling@bloomberg.net

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