ROGERS, June 28, 2014 (AFP) - Canada's Sharp had seven birdies and one bogey on the par-71 Pinnacle Country Club course, setting an early target that none of the later starters could match.
Wie came on strong with four of her five birdies on the back nine, and the US star was joined in second place on five-under 66 by Mexico's Alejandra Llaneza, who also played without a bogey.
On a tightly packed leaderboard, South Korea's Ryu So-Yeon led a group of 10 players sharing fourth place on four-under 67.
Ryu was joined by compatriot Oh Ji-Young, Thailand's Moriya Jutanugarn and Pornanong Phatlum, China's Feng Shanshan, Sweden's Caroline Hedwall, the Philippines' Jennifer Rosales, Chile's Paz Echeverria and Americans Emma Jandel and Gerina Piller.
Eleven players were a further stroke back on 68, the big group including South Korea's Choi Na-Yeon, Norway's Suzann Pettersen and rising US star Jessica Korda.
Wie, 24, claimed the first major title of her career with a victory in the US Women's Open at Pinehurst on Sunday.
It was a long-awaited milestone for the one-time prodigy, who gained notoriety as a teen professional who wanted to test herself against top male golfers but has struggled to establish herself as a force on the LPGA tour.
Wie's major breakthrough is part of a strong 2014 campaign in which she also won the LPGA Lotte Championship in her native Hawaii. She has nine top-10 finishes in 13 starts this year.
Leading first-round scores on Friday in the 54-hole LPGA NW Arkansas Championship (USA unless noted, par-71):
65 - Alena Sharp (CAN)
66 - Michelle Wie, Alejandra Llaneza (MEX)
67 - Pornanong Phatlum (THA), Ryu So-Yeon (KOR), Moriya Jutanugarn (THA), Emma Jandel, Feng Shanshan (CHN), Gerina Piller, Caroline Hedwall (SWE), Oh Ji-Young (KOR), Paz Echeverria (CHI), Jennifer Rosales (PHI)
68 - Choi Na-Yeon (KOR), Suzann Pettersen (NOR), Jenny Shin (KOR), Jessica Korda, Victoria Elizabeth, Mo Martin, Azahara Munoz (ESP), Angela Stanford, Line Vedel (DEN), Karin Sjodin (SWE), Lee-Anne Pace (RSA)