MAMXX SEC Filings — Treasury Securities Portfolio
Data updated: 2026-02-27
31 SEC filings are listed: 23 prospectuses (latest Feb 27, 2026) and 8 annual N-CEN reports (latest Jan 13, 2026).
MAMXX Prospectus (485BPOS / 497)
Objective, strategy, fees and risks. 23 filings on SEC EDGAR.
- Filed Feb 27, 2026 · 485BPOS
- Filed Feb 3, 2026 · 485BPOS
- Filed Aug 29, 2025 · 497
- Filed Mar 6, 2025 · 497
- Filed Feb 28, 2025 · 485BPOS
- Filed Jun 28, 2024 · 497
- Filed Mar 4, 2024 · 497
- Filed Feb 28, 2024 · 485BPOS
- Filed Mar 3, 2023 · 497
- Filed Feb 28, 2022 · 485BPOS
- Filed Feb 25, 2021 · 485BPOS
- Filed Mar 13, 2020 · 485BPOS
- Filed Mar 15, 2019 · 485BPOS
- Filed Mar 15, 2018 · 485BPOS
- Filed Mar 16, 2017 · 497
- Filed Mar 10, 2017 · 485BPOS
- Filed Apr 20, 2016 · 485BPOS
- Filed Mar 17, 2016 · 485BPOS
- Filed Mar 19, 2015 · 485BPOS
- Filed Mar 21, 2014 · 485BPOS
- Filed Mar 18, 2013 · 485BPOS
- Filed Mar 22, 2012 · 485BPOS
- Filed Mar 21, 2011 · 485BPOS
MAMXX Annual census (N-CEN)
Service providers, brokerage and operations. 8 filings on SEC EDGAR.
Browse every Treasury Securities Portfolio filing on SEC EDGAR
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, and annual data from Form N-CEN.
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.