Citadel Advisors LLC Increases Stake in NioCorp Developments Ltd. to 3.4%

On April 8, 2026, Citadel Advisors LLC and its affiliated reporting persons, including Kenneth Griffin, filed a Schedule 13G regarding their holdings in NioCorp Developments Ltd. (NB). As of the event date of February 25, 2026, Citadel Advisors LLC reported beneficial ownership of 4,932,309 common shares, representing 3.4% of the shares outstanding. This indicates a significant increase from their previous position of 36,188 shares. When accounting for all affiliated reporting entities under the control of Kenneth Griffin, the aggregate beneficial ownership reaches 6,216,351 shares, or 4.3% of the company. The shares are held by various entities including Citadel CEMF Investments Ltd. and Citadel Multi-Asset Fund (Ireland) DAC, with Citadel Advisors serving as the portfolio manager. The filing confirms that these securities were acquired in the ordinary course of business and not for the purpose of influencing or changing the control of the issuer. All reporting persons share voting and dispositive power over their respective portions of the reported shares.