X0306 4 2017-08-18 1 0001386570 ChromaDex Corp. CDXC 0001705335 Pioneer Step Holdings Ltd C/O 29TH FLOOR, HARBOUR CENTRE 25 HARBOUR ROAD WANCHAI K3 HONG KONG 0 0 1 0 0001687026 Chau Hoi Shuen Solina Holly C/O 29TH FLOOR, HARBOUR CENTRE 25 HARBOUR ROAD WANCHAI K3 HONG KONG 0 0 1 0 Common Stock 2017-08-18 4 P 0 786167 2.60 A 3846155 D Pioneer Step Holdings Limited ("Pioneer Step") acquired 786,167 shares of the Issuer's common stock at the closing of the third tranche on August 18, 2017, pursuant to the Securities Purchase Agreement, dated April 26, 2017 (the "SPA"), by and among the Issuer, Champion River Ventures Limited ("Champion River") and Pioneer Step, as amended by the First Amendment to Securities Purchase Agreement, dated May 24, 2017 (the "First Amendment"), by and among the Issuer, Champion River and Pioneer Step. The shares are held directly by Pioneer Step. The sole shareholder and sole director of Pioneer Step is Chau Hoi Shuen Solina Holly ("Solina Chau"). Solina Chau disclaims Section 16 beneficial ownership of the securities held by Pioneer Step, except to the extent of her pecuniary interest therein, if any. Exhibit 24 - Power of Attorney (incorporated herein by reference to the Power of Attorney filed as Exhibit 24 to the Form 3 filed by the Reporting Persons on May 8, 2017) Pioneer Step Holdings Limited, By: /s/ Ng Ngar Bun Raymond, Attorney-in-Fact 2017-08-22 Chau Hoi Shuen Solina Holly, By: /s/ Ng Ngar Bun Raymond, Attorney-in-Fact 2017-08-22