Lannett (LCINQ) 8-K Regulation FD Disclosure

Exhibit 99.1

Sources, Uses and Pro Forma Capitalization Pro forma for the repurchase of $50 million Senior Unsecured Notes on May 26, 2016. Pro forma for $125 million revolver draw down on April 8, 2016. Cash netting for purposes of net leverage calculations limited to lesser of unrestricted cash or $200 million. As of June 9, 2016. Amounts do not include the impact of Original Issue Discount (OID) % Cap Amount Leverage Adj. Amount Leverage (Facility) (US$ mm) (Multiple) (US$ mm) (US$ mm) (Multiple) (Percent) Cash (1)(2) $300.4 ($54.9) $245.5 Revolver ($125MM) 125.0 0.4x 125.0 0.4x 6.1% First Bank of Cody Mortgage 0.9 0.0x 0.9 0.0x 0.0% Term Loan A 271.6 0.8x 271.6 0.8x 13.2% Term Loan B 627.1 1.9x 150.0 777.1 2.3x 37.7% Total Secured Debt $1,024.6 3.0x $1,174.6 3.5x 57.0% Total Net Secured Debt (3) $824.6 2.4x $974.6 2.9x Senior Unsecured Notes (1) 200.0 0.6x (200.0) - 0.0x 0.0% Total Debt $1,224.6 3.6x $1,174.6 3.5x 57.0% Total Net Debt (3) $1,024.6 3.0x $974.6 2.9x Market Value of Equity (4) 886.0 2.6x 886.0 2.6x 43.0% Total Capitalization $2,110.6 6.3x $2,060.6 6.1x 100.0% Operating Metrics 31-Mar-16 31-Mar-16 Adjusted EBITDA (US$ mm) $337.0 $337.0 Current Pro Forma Sources Uses Amount Amount (US$ mm) (US$ mm) Cash from B/S $54.9 Refinance Existing Notes $200.0 Incremental Term Loan B 150.0 Fees & Expenses 4.9 Total Sources $204.9(5) Total Uses $204.9(5) $150.0 $150.0 ($50.0) ($50.0) ($50.0) - - - -