X0306 4 2015-12-11 0 0000078460 PIEDMONT NATURAL GAS CO INC PNY 0001368018 Simon Jose M PO BOX 33068 CHARLOTTE NC 28233 0 1 0 0 Vice President Common Stock 2015-12-11 4 A 0 1862 57.35 A 18319.68 D Shares issued upon vesting of 2015 LTIP Award under registrant's Incentive Compensation Plan. Represents value of shares based on closing price of Piedmont stock on day prior to vesting, which was $57.35. No consideration was paid for the shares. This number does not include 1,832.65 shares that are held indirectly by Mr. Simon in his 401(k) account and it does not include 446.4 shares that are held indirectly by Mr. Simon's spouse. /s/ Judy Z. Mayo by limited power of attorney for Jose M. Simon 2015-12-15