MRPXX — State Street Institutional Treasury Plus Money Market Fund

Data updated: 2026-10-16

MRPXX — State Street Institutional Treasury Plus Money Market Fund. no sales load · since 2007 · Money Market. Holdings, fees, performance and SEC filings.

MRPXX Fund Overview

MRPXX — State Street Institutional Treasury Plus Money Market Fund is a US mutual fund managed by SSGA Funds Management, Inc., categorised as Money Market. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.

  • Type: US mutual fund
  • Adviser: SSGA Funds Management, Inc.
  • Trust: State Street Institutional Investment Trust
  • Category: Money Market
  • Inception date: October 24, 2007
  • Ticker: MRPXX
  • SEC CIK: 0001107414
  • SEC series ID: S000019118
  • Share class ID: C000276763
  • FIGI: BBG021T8JWB3
  • LEI: 549300PNASLVKQG64331

About MRPXX

State Street Institutional Treasury Plus Money Market Fund (MRPXX) seeks a high level of current income consistent with preserving principal and liquidity and maintaining a stable $1.00 per share net asset value. It is a government money market fund that invests only in U.S. Treasury bills, notes and bonds and repurchase agreements collateralized by these obligations, through a master-feeder structure that invests substantially all of its assets in the Treasury Plus Portfolio.

MRPXX Debt Constituents

No individual debt constituents are reported in State Street Institutional Treasury Plus Money Market Fund's latest SEC N-PORT filing.

MRPXX Prospectus and SEC Filings

Official State Street Institutional Treasury Plus Money Market Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.

MRPXX Service Providers

Firms that manage, distribute, hold, administer and audit State Street Institutional Treasury Plus Money Market Fund, as reported on SEC Form N-CEN, fiscal year ending December 31, 2025.

  • Adviser: SSGA Funds Management, Inc.
  • Distributor: State Street Global Advisors Funds Distributors, LLC
  • Custodian: State Street Bank and Trust Company
  • Transfer agent: SS&C GIDS, Inc.
  • Administrator: SSGA Funds Management, Inc.
  • Auditor: Ernst & Young LLP
  • Securities lending agent: State Street Bank and Trust Company

Related Funds

Other Money Market funds tracked on ABC INVEST:

MRPXX: Frequently Asked Questions

Does MRPXX charge a sales load?

No. This share class (MRPXX) charges no sales load.

Who manages MRPXX and when did it launch?

MRPXX is managed by SSGA Funds Management, Inc.. It is a series of State Street Institutional Investment Trust. It launched on October 24, 2007.

Where can I find MRPXX's prospectus and SEC filings?

MRPXX's latest prospectus (497) was filed October 16, 2026. All 35 filings are linked on ABC INVEST and on SEC EDGAR (series S000019118). MRPXX SEC filings

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.