CalSTRS — the California State Teachers' Retirement System — is the largest educator-only pension fund in the world, managing roughly $417 billion for California's public school and community college educators. It invests across global equities, private equity, real estate, fixed income and inflation-sensitive assets to fund teachers' defined benefit pensions.
The California State Teachers' Retirement System — CalSTRS — is the largest pension fund on earth dedicated solely to educators, and the second-largest public pension fund in the United States after its sister fund CalPERS. It manages retirement benefits for California's public school teachers and community college faculty, investing a portfolio that crossed $400 billion in 2026. For allocators, it is a reference point for how a very large public plan can cut costs by bringing investment management in-house.
How big is CalSTRS?
The CalSTRS investment portfolio was worth approximately $417 billion as of 31 May 2026. That figure had climbed steadily off a base of roughly $341 billion two years earlier, lifted by strong global equity markets and the fund's growing private-market programmes.
CalSTRS sits in a distinctive position in the institutional landscape. It is large enough to invest like a universal owner — diversified across the entire global economy and unable to escape systemic risks by trading around them — yet it serves a single, well-defined constituency: educators. That combination of scale and focus shapes both its investment strategy and its funding politics.
What is the CalSTRS funded status?
Funded status — assets as a percentage of promised benefits — is the defining health metric for any pension fund. The most recently published figure for the CalSTRS Defined Benefit Program was 75.9% as of 30 June 2023, with subsequent valuations released as markets improved. A funded ratio below 100% reflects a gap between the benefits already promised and the assets on hand to pay them.
CalSTRS' path back to full funding is unusually well-defined. Legislation passed in 2014 (the Funding Plan) raised contribution rates for members, employers and the state, with the explicit goal of eliminating the unfunded liability and reaching full funding by 2046. That legislated glide path distinguishes CalSTRS from many peer plans, where funding policy is set year to year and is more exposed to political pressure. Strong investment returns in recent years have allowed contribution rates to hold steady rather than rise further.
What is the CalSTRS Collaborative Model?
The most important strategic idea at CalSTRS is the Collaborative Model — its programme of managing a growing share of assets internally and investing directly, or alongside trusted partners, rather than paying external managers full fees.
The arithmetic is compelling at CalSTRS' scale. External managers in private equity and real assets typically charge management fees plus a share of profits; on a portfolio measured in hundreds of billions, those fees compound into very large sums. By building internal investment teams, co-investing directly in deals and taking larger, more concentrated positions with fewer partners, CalSTRS estimates it saves hundreds of millions of dollars a year. Those savings flow straight back into the fund and reduce the return the portfolio has to earn to stay on its funding path.
This is the same insight that built the "Canadian model" at funds like CPP Investments and Ontario Teachers': at sufficient scale, in-house capability is cheaper and more controllable than outsourcing. CalSTRS is the leading US public-pension example of the approach.
How does CalSTRS invest?
CalSTRS runs a diversified institutional portfolio designed to hit its long-term return target while limiting the depth of losses in a downturn. The building blocks are familiar to any large asset owner:
- Global public equity — the largest allocation and the portfolio's primary growth engine.
- Private equity — direct stakes and fund commitments seeking returns above public markets.
- Real estate — income-producing property that hedges inflation and diversifies equity risk.
- Fixed income — bonds for income and stability.
- Inflation-sensitive assets — infrastructure and real-return strategies.
- Risk-mitigating strategies — a sleeve explicitly designed to protect capital when equities fall.
That last category is notable. Rather than relying solely on bonds for downside protection, CalSTRS maintains a dedicated allocation intended to cushion the fund during equity drawdowns — a recognition that a pension plan still climbing toward full funding cannot afford to give back years of progress in a single bad market.
Who does CalSTRS serve?
CalSTRS was established by state law in 1913, making it one of the oldest public retirement systems in the United States. It provides retirement, disability and survivor benefits to roughly 1 million members and beneficiaries — California's public educators from pre-kindergarten through community college. Like CalPERS, it is a defined benefit system: members are promised a benefit based on salary and service, and the investment portfolio exists to fund that promise.
Why CalSTRS matters to the institutional market
For asset managers, the lesson of CalSTRS is uncomfortable but instructive: one of their largest potential clients is deliberately building the capability to do without them. The Collaborative Model has reshaped how CalSTRS engages with private-market managers — favouring co-investment, larger commitments to fewer partners, and direct deals — and that posture influences fee negotiations and partnership structures across the industry.
For other pension plans, CalSTRS is a proof point that a US public fund can adopt the cost-saving, direct-investing playbook long associated with Canadian and sovereign funds, even within the constraints of state governance and public-sector compensation.
In plain English
CalSTRS is the pension fund for California's teachers. It invests over $400 billion so it can pay retirement benefits, currently holds roughly three-quarters of the assets it needs to cover every promise, and is on a legislated path to be fully funded by 2046. To get there cheaply, it manages more and more of its money in-house instead of paying outside firms — the strategy it calls the Collaborative Model.
Sources and further reading
- CalSTRS — investment portfolio market value of approximately $417 billion as of 31 May 2026.
- CalSTRS — Defined Benefit Program funded status of 75.9% as of 30 June 2023; full-funding target of 2046 under the 2014 Funding Plan.
- CalSTRS — "CalSTRS at a glance" and Collaborative Model fee-savings disclosures.
- Top1000funds.com — CalSTRS asset-owner profile and prior-year AUM of ~$341B.