In Gentry v. Credit Plan Corp. of Houston, 528 S.W.2d 571, 573 (Tex. 1975), the Court held that "a subsidiary corporation will not be regarded as the alter ego of its parent merely because of stock ownership, a duplication of some or all of the directors or officers, or an exercise of the control that stock ownership gives to stockholders." Gentry, 528 S.W.2d at 573. Though Gentry dealt with whether a subsidiary corporation should be regarded as its parent's alter ego for purposes of service of process, the Fifth Circuit relied on its alter ego rule in determining personal jurisdiction. See Walker, 583 F.2d at 167; Gutierrez v. Raymond Int'l, Inc., 484 F. Supp. 241, 253 (S.D. Tex. 1979); Conner, 944 S.W.2d at 419; 3- D Elec. Co. v. Barnett Constr. Co., 706 S.W.2d 135, 139 (Tex. App.-Dallas 1986, writ ref'd n.r.e.).