The asset was held on the company's books at a value of $11 million, so the sale represents a significant premium – and clearly the market had no idea it could be worth so much – otherwise the share price would have been much higher and the rise today would have been much smaller.

Ariadne had a market cap of $73 million at last night's close of 36.5 cents – but that has now jumped to more than $107 million with the share price around 53.5 cents.

The investment company had three divisions focused on investments (securities including shares), car parking – through its Secure Parking holding and property – consisting of Orams Marine Village in Auckland and the marinas at Port Macquarie and Batemans Bay – although the marinas were sold off in March this year.

Ariadne says the proceeds from the sale of the Secure Parking asset will be reinvested into other assets, which may have dashed shareholders hopes of a special dividend or capital return.

However, if Ariadne can reinvest the proceeds into assets that deliver more capital gains and income, then shareholders should be pleased.

Excluding Secure Parking, Ariadne held gross assets worth ~$86 million at the end of June suggesting that shares may still be cheap compared to the total value of the assets. Net assets – excluding Secure Parking and $10.7 million in liabilities – were ~$75 million – but add in the proceeds of $75 million from the sale of Secure Parking and you can see that the net asset value of Ariadne is around $150 million or ~75 cents a share.

That's a rough calculation, and there's no guarantee that Ariadne's assets could be sold for book value or above. However, Foolish investors willing to dig deeper may uncover a hidden gem.

The post Why the Ariadne Australia Limited share price jumped 49% today appeared first on The Motley Fool Australia.

Overlooked in the plethora of large companies reporting their full year and interim results today are four stocks that have posted strong gains of more than 10%.

Here's our rundown on the four companies and why their share prices have surged…

Hub24 Ltd (ASX: HUB) is up 20.4%, after the company announced the acquisition of independently owned financial planning licencee Paragem Pty Ltd. Paragem has 20 financial advisory practices across Australia and has been cashflow positive for the past two financial years. Hub24 is paying cash of $1m upfront, with a deferred payment of another $1m, plus an earnout provision of up to $6m over the next 3 years – paid for in HUB24 shares.

Reverse Corp Limited (ASX: REF) is up 15.4% at 15 cents, after noted micro-cap fund manager Pie Funds Management took a 10.7% stake in the company from CC Asia Absolute Return Master Fund, at an average of 7 cents a share. Reverse Corp expects to report earnings before interest, tax, depreciation and amortisation (EBITDA) of around $2.4 million for the 2014 financial year.

Ariadne Australia Limited (ASX: ARA) has seen its share rise 14.3%, after the company reported a 219% jump in net profit to $6.3 million, compared to the previous year. Ariadne is an investment company with a 50% holding in Secure Parking, which generated the majority of profit, but its investment and property divisions also saw strong profits.

Maverick Drilling and Exploration Ltd (ASX: MAD), once a market darling, is up 10.8% at 20.5 cents, recovering from a fall to 17 cents earlier in the week. That came after the company revised down its proven oil and gas reserves from to just 4.4 million barrels. It's still early days yet for Maverick though.

The post 4 stocks soaring more than 10% today appeared first on The Motley Fool Australia.