SemGroup Corp. priced its upsized public offering of 7.5 million Class A common shares at $27 each.

The underwriter received a 30-day option to purchase about 1.1 million additional shares.

Net proceeds of $202.5 million will support working capital and general corporate purposes that include capex and paying down the revolving credit facility.

The offering is scheduled to close on June 22.

Barclays is the sole book-running manager.

SemGroup Corp. is based in Tulsa, Okla.