4. Debt

Repricing of Term Loan Facility

On March 31, 2017, the Company entered into a repricing amendment to the credit agreement governing its $350.0 million senior secured term loan facility maturing on September 30, 2023 (the "Term Loan Facility"). The amendment reduced the margins applicable to the term loan from 3.25% per annum (subject to a leverage-based step-down to 2.75%) to 2.50% per annum (subject to a leverage-based step-down to 2.00%) in the case of base rate loans, and from 4.25% per annum (subject to a leverage-based step-down to 3.75%) to 3.50% per annum (subject to a leverage-based step-down to 3.00%) in the case of LIBOR loans (subject to a 1.00% floor on LIBOR loans), provided that each of the leverage-based step-downs was contingent upon the consummation of the IPO. The amount and terms of the Term Loan Facility were otherwise unchanged.

Repayment of Debt with Proceeds from Initial Public Offering

On May 2, 2017, the Company completed its IPO, pursuant to which it sold an aggregate of 10,147,025 shares of Class A common stock, par value $0.001 per share (after giving effect to the underwriters’ exercise in full of their option to purchase additional shares) at a price of $21.00 per share. The Company received aggregate net proceeds of approximately $192.0 million after deducting underwriting discounts and commissions and other offering expenses.

The Company used net proceeds from the IPO of approximately $192.0 million to repay a portion of the amounts outstanding under the Term Loan Facility, including accrued and unpaid interest. The partial paydown resulted in a loss on extinguishment of debt in the amount of approximately $5.4 million.

Fair Value of Debt

Market risk associated with our fixed and variable rate long‑term debt relates to the potential change in fair value and negative impact to future earnings, respectively, from a change in interest rates. The aggregate fair value of debt is based primarily on our estimates of interest rates, maturities, credit risk, and underlying collateral and is classified as Level 3 within the fair value hierarchy. At September 28, 2017 and December 29, 2016, the fair values of the Company’s debt were as follows: