On Feb. 27 Southwestern Energy Co. announced net profit for the 2000 fiscal year, ended Dec. 31, as $4.15 million for its seven wholly-owned subsidiaries. The company's remaining natural gas utility, Arkansas Western Gas Co., recorded a net profit of $7.78 million. Headquartered in Fayetteville, Arkansas Western Gas sold $144.59 million of gas to an average of 152,727 customers last year.