17 CFR 240.12d2-2(a)(2)
Preliminary Notes:
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The filing of the Form 25 (Sec. 249.25 of this chapter) by an issuer relates solely to the withdrawal of a class of securities from listing on a national securities exchange and/or from registration under section 12(b) of the Act (15 U.S.C. 78l(b)), and shall not affect its obligation to be registered under section 12(g) of the Act and/or reporting obligations under section 15(d) of the Act (15 U.S.C. 78o(d)).
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https://www.law.cornell.edu/cfr/text/17/240.12d2-2