Image Source: UnsplashInvestors closely monitor insider buys. But who are ‘insiders’?An insider is defined by Section 16 of the Security Exchange Act as an officer, director, 10% stockholder, or anyone who possesses information because of their relationship with the company.Of course, many strict rules apply to insiders. Notably, they have a longer holding period than most, a critical aspect investors should know.Several companies – Dominion Energy (D – Free Report) , Carvana (CVNA – Free Report) , Keurig Dr Pepper (KDP – Free Report) , American Homes 4 Rent (AMH – Free Report) , and Enphase Energy (ENPH – Free Report) – have all seen recent insider activity. Let’s take a closer look at the transactions for those interested in trading like the insiders.Enphase EnergyEnphase Energy is a global energy technology company that delivers energy management technology for the solar industry.The CEO of Enphase Energy recently made a splash, acquiring 4000 shares at a total transaction value of roughly $480k. Analysts have taken a bearish stance on the stock, revising their earnings expectations lower over the last several months.Image Source: Zacks Investment ResearchDown 40% over the last year, the purchase reflects a confident stance among the CEO, scooping up shares at slashed levels.  American Homes 4 RentAmerican Homes 4 Rent is an internally managed real estate investment trust. A Director recently purchased roughly 1,000 shares, totaling $23.7k.Investors stand to reap a passive income from AMH shares, currently yielding 2.4% annually. And dividend growth is robust, with the company carrying a 50% five-year annualized dividend growth rate.Image Source: Zacks Investment ResearchKeurig Dr PepperKeurig Dr Pepper is a beverage and coffee company in the United States and Canada. The CEO recently made a big purchase, acquiring 171k shares at a total cost of $5 million.Like AMH, KDP shares reward investors nicely, paying out 2.9% annually. Dividend growth is also apparent, with the company carrying a 10% five-year annualized dividend growth rate.The current yield is a few ticks higher than the average of those in the Zacks Beverages – Soft Drinks industry, as shown below.Image Source: Zacks Investment ResearchDominion EnergyDominion Energy and its subsidiaries produce and transport energy in the United States. Analysts have taken a bearish stance on the company’s outlook, with the current $3.01 Zacks Consensus EPS estimate down 22% over the last year and pushing the stock into an unfavorable Zacks Rank #4 (Sell).Image Source: Zacks Investment ResearchThe CEO of Dominion recently bought 21.7k shares at a total cost of just under $1 million. The company’s near-term outlook is undoubtedly cloudy, and investors would likely be better off waiting for positive earnings estimate revisions to hit the tape.CarvanaCarvana is a leading e-commerce platform for buying and selling used cars. A Director recently purchased 1.3k shares at a total cost of $100k.Shares have been on a remarkable run over the last year, gaining nearly 800% in value and crushing its respective Zacks industry performance.Image Source: Zacks Investment ResearchBottom LineMany investors closely monitor insider buys, as they can provide insight into the longer-term picture. After all, if an insider didn’t believe in the company’s future pathway, why would they buy?All five stocks above – Dominion Energy, Carvana, Keurig Dr Pepper, American Homes 4 Rent, and Enphase Energy – have seen recent insider activity.More By This Author:3 Stocks To Buy For Post-Earnings Momentum 3 Top-Ranked Stocks To Buy For Stability These Highly Ranked Construction Sector Stocks Could March Higher This Month