LONDON -- A week of strong company results is boosting the FTSE 100 (INDEX: ^FTSE) nicely: The U.K.'s major stock market index is up 0.26% by 8:15 a.m. EST to 6,444 -- but it did briefly beat that yesterday, setting a new 52-week high of 6,461 pence before falling back at closing time.

But there are individual constituents of the index doing even better than that. Here are three that are heading up today.

Aggreko (AGK)
Aggreko shares stormed up 13.3% to 1,991 pence in response to a great set of full-year results. For the year to December 2012, group revenue at the power and temperature-control equipment specialist rose by 14% to 1.6 billion pounds, with pre-exceptional pre-tax profit up 11% to 367 million pounds. Earnings per share rose 16% to 104 pence, and the full-year dividend was lifted by 15% to 23.9 pence per share.

Chairman Ken Hanna said, "The recently completed Strategy Review underlines the strong position the Group holds in fast-growing markets, and the exciting prospects that lie ahead for the next five years."

IMI (IMI -0.92%)
Results from IMI sent the shares flying up 5.4% to 1,330 pence after the engineer lifted its full-year dividend by 8% to 32.5 pence per share. Revenue grew by 3% to 2.2 billion pounds over the year, with adjusted pre-tax profit up a modest 1% to 366.3 million pounds. Adjusted earnings rose 3% to 84.3 pence per share.

The shares are now up 40% over the past 12 months, with 2013 forecasts putting them on a P/E of just less than 15. There's 11% earnings growth forecast for 2014, though that's quite some way out yet.

Schroders (SDR -4.19%)
Shares in Schroders gained 1.6% after the investment firm revealed record assets under management of 212 billion pounds at the end of 2012, 13% up on the same stage of the previous year. EPS fell by 9.7% to 104.7 pence, but that was better than analysts' expectations of about 97 pence. The full-year dividend beat expectations, too, up 10% to 43 pence per share.

Schroders told us that despite fluctuating economic conditions over the year and fears over the eurozone and China, the firm had a solid year and dividends should remain "well supported" for 2013.

When we see shares rising like these, attention must surely turn to investing in growth possibilities (though a side helping of dividends is always a welcome addition). But finding companies that have not yet achieved their full potential is not always easy, which is why The Motley Fool's best analysts have put their heads together to bring you their top growth selection for 2013. You can find out what it is completely free of charge, but the report will be available for a limited period only. So click here to get your copy today.