DELAFIELD, Wis. (Stockpickr) -- Corporate insiders sell their own companies' stock for a number of reasons.

They might need the cash for a big personal purchase such as a new house or yacht, or they might need the cash to fund a charity. Sometimes they sell as part of a planned selling program that they have put in place for diversification purposes, which allows them to sell stock in stages instead of selling all at one price.

Other times they sell because they think their stock is overvalued and the risk/reward is no longer attractive. Some even dump their own stock because they have inside knowledge that a competitor is eating their lunch and stealing market share.

But insiders usually buy their own shares for one reason: They think the stock is a bargain and has tremendous upside.

The key word in that last statement is "think." Just because a corporate insider thinks his or her stock is going to trade higher, that doesn't mean it will play out that way. Insiders can have all the conviction in the world that their stock is a buy, but if the market doesn't agree with them, the stock could end up going nowhere. Also, I say "usually" because sometimes insiders are loaned money by the company to buy their own stock. Those loans are often sweetheart deals and shouldn't be viewed as organic insider buying.

At the end of the day, it's institutional money managers running big mutual funds and hedge funds that drive stock prices, not insiders. That said, many of these savvy stock operators will follow insider buying activity when they agree with the insider that the stock is undervalued and has upside potential. This is why it's so important to always be monitoring insider activity but twice as important to make sure the trend of the stock coincides with the insider buying.

Recently, a number of companies' corporate insiders have bought large amounts of stock. These insiders are finding some value in the market, which warrants a closer look at these stocks.

YuMe

YUME ChartYUME data by YCharts

One stock that insiders are loading up on here is YuMe  (YUME), which provides digital video brand advertising solutions in the U.S. and internationally. Insiders are buying this stock into modest weakness, since shares are off by 1.5% over the last six months.

YuMe has a market cap of $174 million and an enterprise value of $133 million. This stock trades at a reasonable valuation, with a price-to-sales of 1.00 and a price-to-book of 1.71. Its estimated growth rate for this year is 23.5%, and for next year it's pegged at 100%. This is a cash-rich company, since the total cash position on its balance sheet is $45.13 million and its total debt is just $8,000.

A beneficial owner just bought 268,178 shares, or about $1.44 million worth of stock, at $5.38 to $5.40 per share.

From a technical perspective, YuMe is currently trending above both its 50-day and 200-day moving averages, which is bullish. This stock has been consolidating and trending sideways over the last month, with shares moving between $5.03 on the downside and $5.76 on the upside. Shares of YuMe have recently pulled back to right around its 200-day moving average of $5.17 a share and back below its 20-day moving average of $5.32 a share.

If you're bullish on YuMe, then I would look for long-biased trades as long as this stock is trending above its 200-day at $5.17 or above its 50-day at $5.04 and then once it breaks out above its 20-day at $5.32 and then above some key overhead resistance levels at $5.60 to $5.85 a share with high volume.

Look for a sustained move or close above those levels with volume that hits near or above its three-month average action of 128,443 shares. If that breakout triggers soon, then this stock will set up to re-test or possibly take out its next major overhead resistance level at its 52-week high of $6.51 a share.

Carbonite

CARB ChartCARB data by YCharts

Another stock that insiders are active in here is Carbonite (CARB - Get Report), which provides cloud and hybrid backup solutions to small and medium sized businesses and individuals in the U.S. Insiders are buying this stock into notable weakness, since shares have fallen by 16.7% over the last six months.

Carbonite has a market cap of $321 million and an enterprise value of $261 million. This stock trades at a premium valuation, with a forward price-to-earnings of 84. Its estimated growth rate for the next quarter is 75%, and for next year it's pegged at 40%. This is a cash-rich company, since the total cash position on its balance sheet is $64.54 million and its total debt is zero.

The CEO just bought 10,000 shares, or about $118,000 worth of stock, at $11.85 per share.

From a technical perspective, Carbonite is currently trending below its 200-day moving average and above its 50-day moving average, which is neutral trendwise. This stock has been uptrending over the last three months, with shares moving higher from its low of $9.90 to its recent high of $12.26 a share. During that uptrend, shares of Carbonite have been making mostly higher lows and higher highs, which is bullish technical price action.

If you're in the bull camp on Carbonite, then I would look for long-biased trades as long as this stock is trending above its 50-day moving average of $11.38 and then once it breaks out above some near-term overhead resistance levels at $12 to $12.26 a share and then above its 200-day at $12.46 a share with volume that hits near or above its three-month average action of 161,500 shares.

If that breakout hits soon, then this stock will set up to re-test or possibly take out its next major overhead resistance level at $13 a share. Any high-volume move above $13 will then give this stock a chance to re-fill some of its previous gap-down-day zone from March that started near $15 a share.

Dorian

LPG ChartLPG data by YCharts

One energy stock that insiders are jumping into here is Dorian (LPG - Get Report), which operates as a liquefied petroleum gas shipping company worldwide. Insiders are buying this stock into big strength, since shares have ripped higher by 36.5% over the last six months.

Dorian has a market cap of $957 million and an enterprise value of $955 million. This stock trades at a fair valuation, with a trailing price-to-earnings of 36.6 and a forward price-to-earnings of 9.99. Its estimated growth rate for this year is 343.8%, and for next year it's pegged at -22.5%. This is not a cash-rich company, since the total cash position on its balance sheet is $204.82 million and its total debt is $213.07 million.

The CEO just bought 20,000 shares, or about $338,000 worth of stock, at $16.91 to $16.96 per share.

From a technical perspective, Dorian is currently trending above both its 50-day and 200-day moving averages, which is bullish. This stock has been uptrending strong over the last six months, with shares soaring higher from its low of $10.10 to its recent high of $17.59 a share. During that uptrend, shares of Dorian have been consistently making higher lows and higher highs, which is bullish technical price action.

If you're bullish on Dorian, then I would look for long-biased trades as long as this stock is trending above its 50-day moving average of $15.02 or above more near-term support at $14.93 and then once it breaks out above some near-term overhead resistance levels at $17.38 to $17.59 a share with high volume.

Look for a sustained move or close above those levels with volume that registers near or above its three-month average action of 198,333 shares. If that breakout develops soon, then this stock will set up to re-test or possibly take out its next major overhead resistance levels at $19 to $20, or even $22 a share.

Lawson Products

LAWS ChartLAWS data by YCharts

Another stock that insiders are jumping into here is Lawson Products (LAWS - Get Report), which distributes various products and services for the industrial, commercial, institutional and government maintenance, repair and operations marketplace in the U.S. and Canada. Insiders are buying this stock into notable weakness, since shares have trended lower by 14% over the last six months.

Lawson Products has a market cap of $193 million and an enterprise value of $215 million. This stock trades at a cheap valuation, with a forward price-to-earnings of 52.7. Its estimated growth for the current quarter is 57.1%, and for next year it's pegged at 223.1%. This is not a cash-rich company, since the total cash position on its balance sheet is $1.99 million and its total debt is $9.20 million.

A beneficial owner just bought 25,828 shares, or about $616,000 worth of stock, at $23.80 per share.

From a technical perspective, Lawson Products is currently trending below both its 50-day and 200-day moving averages, which is bearish. This stock trended to the downside on Tuesday, with shares of Lawson Products trending back below both its 50-day and 200-day moving averages. That said, this stock is still trading inside of its recent range, that's seen shares of Lawson Products move between $21 on the downside and right around $25 on the upside.

If you're bullish on Lawson Products, then I would look for long-biased trades as long as this stock is trending above some near-term support at $21 a share and then once it breaks out above its 50-day at $23.06 and its 200-day at $23.81 a share and back above some major overhead resistance at $25 a share with high volume.

Look for a sustained move or close above those levels with volume that hits near or above its three-month average action of 40,259 shares. If that breakout materializes soon, then this stock will set up to re-test or possibly take out its next major overhead resistance levels at $27 to its 52-week high of $28.30 a share.

Atlas Energy Group

ATLS ChartATLS data by YCharts

One final stock with some decent insider buying is Atlas Energy Group (ATLS), which develops and produces natural gas, crude oil and natural gas liquids in the U.S. Insiders are buying this stock into massive weakness, since shares have plunged by 58.9% over the last six months.

Atlas Energy Group has a market cap of $101 million and an enterprise value of $1.6 billion. This stock trades at a cheap valuation, with a price-to-sales of 0.15 and a price-to-book of 0.60. This is not a cash-rich company, since the total cash position on its balance sheet is $13.54 million and its total debt is $1.60 billion.

A beneficial owner just bought 30,352 shares, or about $132,000 worth of stock, at $4.37 per share.

From a technical perspective, Atlas Energy Group is currently trending below both its 50-day and 200-day moving averages, which is bearish. This stock has been downtrending badly over the last four months, with shares plunging lower from its high of $8.05 to its recent low of $3.85 a share. During that downtrend, shares of Atlas Energy Group have been consistently making lower highs and lower lows, which is bearish technical price action. That said, this stock has been attempting to carve out a near-term bottom over the last few weeks, with shares finding buying interest at around $3.85 to $3.88 a share.

If you're bullish on Atlas Energy Group, then I would look for long-biased trades as long as this stock is trending above some near-term support at $3.88 to $3.85 a share and then once it breaks out above some near-term overhead resistance levels at $4 to $4.20 a share with high volume. Look for a sustained move or close above those levels with volume that hits near or above its three-month average volume of 193,289 shares.

If that breakout gets going soon, then this stock will set up to re-test or possibly take out its next major overhead resistance levels at $4.40 to $4.60, or even $4.88 to $5 a share.

This article is commentary by an independent contributor. At the time of publication, the author held no positions in the stocks mentioned.