This week was a mixed one for investors in the energy sector. While oil prices hit new highs for the year, that rising tide didn't lift all boats.

If fact, several energy stocks were down by more than 10% this week after delivering disappointing news to investors. Three of the biggest losers, according to S&P Capital IQ data, were GulfMark Offshore (NYSE:GLF)Peabody Energy (NYSE:BTU), and Natural Resource Partners (NYSE:NRP). To learn more about the news that drove these stocks lower, check out the slideshow below.

Matt DiLallo has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.