Пожалуй не соглашусь, из того что нашёл, если переходишь порог 5% нужно в течении 10 дней.
Under Section 13(d), any person who indirectly or directly becomes the beneficial owner of more than 5% of an issuer’s equity securities registered under Section 12 of the Exchange Act or any equity security of an insurance company that is exempt from registration under Section 12(g)(2)(g) of the Exchange Act, must file with the SEC a Schedule 13D within 10 days after the acquisition.