SCHEDULE 13G/A

NUVEEN VRIABL RAT PFD & INM

Common Stock · CUSIP: 67080R102

Event date: 2025-02-14

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Sit Investment Associates, Inc.

  Shares: 2,545,155.00 · Class: 10.5%

• Sit Fixed Income Advisors II, LLC

  Shares: 2,545,155.00 · Class: 10.5%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.