1. HF Sinclair is traded on the New York Stock Exchange under the symbol "DINO"
2. Additional information can be located by accessing the following link: DINO on NYSE

Transfer Agent

Effective February 1, 2018, EQ Shareowner Services is our new Transfer Agent and Registrar. Your stockholder records will automatically transfer to EQ Shareowner Services. You may contact EQ Shareowner Services as provided below:

Online

www.shareowneronline.com

Telephone

800-468-9716 (Toll-Free)
651-450-4064 (Outside the United States)

Written Correspondence

EQ Shareowner Services
P.O. Box 64874
St Paul, MN 55164-0854

Certified and Overnight Delivery

EQ Shareowner Services
1110 Centre Point Curve, Suite 101
Mendota Heights, MN 55120

We do not directly offer either a DSP or DRIP at this time. However, our transfer agent, EQ Shareowner Services, makes such programs available to our shareholders. For further information, please contact EQ Shareowner Services as provided below:

www.shareowneronline.com

Telephone

800-468-9716 (Toll-Free)
651-450-4064 (Outside the United States)

Written Correspondence

EQ Shareowner Services
P.O. Box 64874
St Paul, MN 55164-0854

For inquiries regarding royalty payments, please contact our Division Orders Group as provided below:

Email

Division.Orders@HollyFrontier.com

Telephone

575-748-4033

Written Correspondence

The HollyFrontier Companies
P.O. Box 1600
Artesia, NM 88211-1600

The Board evaluates dividend declarations quarterly. Historically, HF Sinclair has paid a quarterly cash dividend per share of its common stock. Receipt of dividends previously declared by the HF Sinclair Board of Directors has generated Form 1099-DIV for tax purposes. See the Dividend History webpage for more details.