What a month for the S&P/ASX 200 (Index: ^AXJO) (ASX: XJO)!

Lots of carnage yesterday, with an estimated $40 billion wiped off the sharemarket.

The big four banks got hammered losing around 5% each. Mining shares didn’t fare much better, losing between 2% and 5%, except of course for our gold miners who gained between 6% and 9%.

But, it’s not all bad news for investors!

Today I’ve compiled a list of five companies that continue to buck the trend. These five-star performers have crushed the S&P/ASX 200 over the past month, which is down almost 10% year to date.

ResMed Inc. (CHESS) (ASX: RMD)

ResMed recently announced results for its quarter ended 31 December 2015. Revenue for the quarter was up 7% to $454.5m compared to the pcp. This was a 13% increase on a constant currency basis.

ResMed has outperformed the market by 11% over the past month and its growth should continue on a strong trajectory as more patients incorporate ResMed’s non-invasive treatments into their sleeping patterns. The company has also changed its focus onto compliance rather than low-cost systems, which means ResMed should thrive, given its history of introducing innovative products that improve sleep apnea therapy.

Oil Search Limited (ASX: OSH)

Oil Search recently provided its quarterly activities report for the period ended 31 December 2015 showing its production in the fourth quarter of 2015 was 7.51m barrels of oil equivalent (mmboe). Its continued strong performance during the quarter took 2015 full year production to 29.25 mmboe, 52% higher than production in 2014 and an all-time record for the company.

Oil Search outperformed the market by 6% over the past month. Its group equity output has tripled to 24 million barrels of oil equivalent with the startup of the PNG LNG project, which means the company can service its USD $3.8 billion in net debt using LNG and oil cash flow.

JB Hi-Fi Limited (ASX: JBH)

JB Hi-Fi recently released its half-year report showing net profit was up 7.52% to $95.2 million compared to the pcp. JB Hi-Fi has outperformed the market by 12% over the past month and may continue to dominate its space thanks to the downfall of Dick Smith Holdings Ltd (ASX: DSH).

Treasury Wine Estates Ltd (ASX: TWE)

Treasury recently announced a trading update notifying that its Earnings Before Interest, Tax and SGARA (EBITS) for the six months ended 31 December 2015 will be $120 million.

Treasury has outperformed the market by 12% over the past month, the reason, the company continues to have a balanced proportion of luxury/premium brands which assures access to distributors in all major markets, while several iconic brands afford easier access to fast-growing wine demand in emerging markets, in particular China.

Medibank Private Ltd (ASX: MPL)

Last month, Medibank’s unaudited financials suggested operating profit of $270 million for the six months to December 31 2015. It now anticipates full-year operating profit to exceed $470 million, $100 million above its previous guidance.

Medibank has outperformed the market by 16% over the past month. The company’s key strength is its relationship with the private hospital operators. Private hospitals are reliant on the private insurance system, as the majority of private hospital income is paid by the insurers.

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Motley Fool contributor John Hopkins has no position in any stocks mentioned. Unless otherwise noted, the author does not have a position in any stocks mentioned by the author in the comments below. The Motley Fool Australia has no position in any of the stocks mentioned. 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. This article contains general investment advice only (under AFSL 400691). Authorised by Bruce Jackson.