EX-99.d.2

Delaware Management Company

100 Independence, 610 Market Street

Philadelphia, PA 19106-2354

February 19, 2026

Delaware Group^® Adviser Funds

100 Independence, 610 Market Street

Philadelphia, PA 19106-2354

To whom it may concern:

By our execution of this letter agreement (the “Agreement”), intending to be legally bound hereby, Delaware Management Company, a series of Nomura Investment Management Business Trust (the “Manager”), agrees that in order to improve the performance of Nomura Diversified Income Fund (the “Fund”), a series of Delaware Group Adviser Funds, the Manager shall waive all or a portion of its investment advisory fees and/or pay/reimburse expenses (excluding any 12b-1 fees, acquired fund fees and expenses, taxes, interest, short sale dividend and interest expenses, brokerage fees, certain insurance costs, and nonroutine expenses or costs, including, but not limited to, those relating to reorganizations, litigation, conducting shareholder meetings, and liquidations (collectively, the “Excluded Expenses”)) in an aggregate amount equal to the amount by which the Fund’s total annual fund operating expenses (excluding any Excluded Expenses) exceed the percentages set forth below for the period from February 27, 2026 through February 26, 2027. For purposes of this Agreement, Excluded Expenses may also include such additional costs and expenses as may be agreed upon from time to time by the Fund’s Board of Trustees and the Manager.

The Manager acknowledges that it (1) shall not be entitled to collect on, or make a claim for, waived fees at any time in the future, and (2) shall not be entitled to collect on, or make a claim for, reimbursed Fund expenses at any time in the future.

Delaware Management Company, a series of

Nomura Investment Management Business Trust