Looking at the universe of stocks we cover at Dividend Channel, on 12/3/14, Insperity Inc (NSP), Iron Mountain Inc (IRM), and Knight Transportation Inc. (KNX) will all trade ex-dividend for their respective upcoming dividends. Insperity Inc will pay its quarterly dividend of $0.19 on 12/19/14, Iron Mountain Inc will pay its quarterly dividend of $0.475 on 12/22/14, and Knight Transportation Inc. will pay its quarterly dividend of $0.06 on 12/22/14.As a percentage of NSP's recent stock price of $32.80, this dividend works out to approximately 0.58%, so look for shares of Insperity Inc to trade 0.58% lower — all else being equal — when NSP shares open for trading on 12/3/14. Similarly, investors should look for IRM to open 1.25% lower in price and for KNX to open 0.18% lower, all else being equal. Below are dividend history charts for NSP, IRM, and KNX, showing historical dividends prior to the most recent ones declared. Insperity Inc (NSP):
Iron Mountain Inc (IRM):
In Monday trading, Insperity Inc shares are currently up about 0.5%, Iron Mountain Inc shares are off about 0.3%, and Knight Transportation Inc. shares are off about 0.4% on the day.