An 18-year bet on “cleantech” has left California’s largest public pension with a 71% loss, $22 million in private equity fees, and a Congressional subpoena on the doorstep. The fund’s broader $100 billion climate push, meanwhile, is quietly propped up by Exxon, Chevron, and Shell.
The California Public Employees’ Retirement System — CalPERS, the $532 billion behemoth that underwrites retirement for roughly two million current and former state workers — is now the subject of a formal Congressional investigation over a single private equity vehicle that has incinerated more than $330 million in retiree capital while its general partners quietly collected management fees for nearly two decades. The fund at the center of the probe, the CalPERS Clean Energy & Technology Fund, was pitched in 2007 as a way to marry California’s climate ambitions with its fiduciary obligations. Eighteen years later, filings show it has done neither.
In a February 12, 2026 letter, the U.S. House Committee on Education and the Workforce gave CalPERS until February 27 to produce internal records explaining how the fund lost 71% of its principal while the pension system’s leadership publicly doubled down on a broader $100 billion “Climate Action Plan.” The investigation pulls back the curtain on an arrangement that, records suggest, channeled hundreds of millions of dollars into speculative biofuel, algae, and cellulosic ethanol ventures — many of which later filed for bankruptcy — while CalPERS refused to disclose the underlying portfolio to the public it serves.
A $468 Million Commitment, $138 Million Left
The numbers are unambiguous. According to CalPERS’ own investment records cited by the House committee and reproduced in state-level reporting, the pension system committed $465 million to the Clean Energy & Technology Fund (CETF) in 2007, at the apex of the first “cleantech bubble.” Over the years that followed, CalPERS actually paid in $468,423,814 in capital calls. As of March 31, 2025 — the most recent reporting date available — the cash-plus-remaining value of that investment had fallen to $138,045,373.
CalPERS’ own books show a net internal rate of return of –18.6% on the vehicle. On any reading, the fund ranks among the worst-performing private equity commitments in the pension’s history.
- Total committed (2007): $465 million
- Capital paid in: $468.4 million
- Value as of March 31, 2025: $138.1 million
- Loss since inception: $330+ million (71%)
- Management fees paid to GPs: at least $22 million
- Net IRR: –18.6%
The fund was originally structured by Pacific Corporate Group, a La Jolla–based private equity adviser that CalPERS publicly severed ties with in 2010 amid an unrelated pay-to-play scandal that ensnared a former CalPERS board member. Management was later reassigned to Capital Dynamics. Under a fund-of-funds architecture — CalPERS to CETF to underlying venture capital firm to startup — industry analysts estimate total fee drag across the structure can exceed 25% of the original commitment before any returns flow back to beneficiaries.
What the CETF Actually Bought
Though CalPERS has declined to release a full list of the fund’s underlying portfolio companies, independent reporting and trade publications have identified multiple losers among the vehicle’s bets. Industry documentation of CalPERS-adjacent cleantech exposure through this period names several failed vintages, including:
- Cellulosic ethanol pilots that never reached commercial scale, beset by feedstock economics and enzyme costs that refused to fall;
- Algae and jatropha biofuel ventures that collapsed under yield and water-usage problems;
- Fulcrum BioEnergy, a municipal-waste-to-jet-fuel venture that filed for Chapter 11 bankruptcy in 2024 after years of cost overruns at its Nevada facility;
- World Energy’s Paramount project, a sustainable aviation fuel conversion that suffered major capital setbacks as expected costs ballooned.
By contrast, the biofuel investments that generated real returns during the same window were not the venture-backed start-ups favored by the CETF but the established majors — Phillips 66’s Rodeo Renewed refinery, Marathon Petroleum’s Martinez Renewable Fuels plant, and Chevron’s 2022 acquisition of Renewable Energy Group — all of which retrofitted proven infrastructure rather than inventing new chemistry. None of those companies are ESG darlings. All of them are, to varying degrees, on the divestment lists CalPERS has simultaneously been pressured to adopt.
The Transparency Problem
When The Center Square and other outlets filed California Public Records Act requests seeking detailed information about the CETF’s underlying holdings and fee structure, CalPERS declined to produce the documents, citing a state statute that exempts “alternative investments” — private equity, hedge funds, and real assets — from most disclosure requirements.
“The public should have a right to know how public money is being invested,” David Loy, legal director of the First Amendment Coalition, said in response to those denials. Loy’s organization has argued for years that the alternative-investment carve-out in California’s open-records regime has been stretched beyond its original purpose of protecting genuinely competitive trade secrets and is now functioning as a blanket shield against basic accountability.
The House committee’s February letter zeroes in on exactly this problem. Its seven document requests seek due-diligence memoranda for the fund’s selection, board and staff communications regarding compliance with “exclusive benefit” requirements, fee schedules, performance reports, investment decision records, and consultant and advisory service expenses. In effect, Congress is asking for everything CalPERS has declined to give California taxpayers.
A “Climate” Portfolio Built on Oil Majors
If the CETF were an isolated misstep, it might amount to a cautionary footnote about the first cleantech boom. But records suggest the fund sits inside a much larger pattern. In November 2023, CalPERS announced a $100 billion “Climate Action Plan,” pledging to invest that sum in “climate solutions” by 2030 as part of a broader commitment to halve portfolio carbon intensity and reach net-zero emissions by 2050. By June 30, 2025, CalPERS reported that it had already booked $59.7 billion toward that goal — nearly 60% of the target.
A closer look at the underlying holdings suggests the definition of “climate solution” is doing extraordinary work. According to documents obtained through California Public Records Act requests by the worker advocacy group California Common Good, the “climate” portfolio and adjacent retirement-asset holdings include positions in nearly every major listed oil and gas company in the world: BP, Chevron, ExxonMobil, Marathon Petroleum, Occidental Petroleum, Shell, and Valero Energy, along with state-controlled producers from Abu Dhabi, Brazil, China, Malaysia, and Saudi Arabia.
The advocacy group’s analysis, drawing on CalPERS’ own September 30, 2024 holdings data, found:
- $549.58 million invested in Shell and Shell International Finance securities alone;
- $3.56 billion across companies appearing on science-based lists of the most dangerous greenhouse gas emitters operating in the U.S. or worldwide;
- Only $25.7 billion of the $47 billion “climate solutions” total initially announced was disclosed in publicly traded form, with the remainder allocated to private vehicles whose holdings CalPERS has not itemized.
California Senate Majority Leader Lena Gonzalez, herself a Democrat, told reporters that the inclusion of major oil companies in the climate plan “is a disservice to the intent of the Board of Trustees, beneficiaries and to the hardworking people of California.” CalPERS, for its part, has defended the holdings on the theory that engagement with oil producers can encourage transition investment — a position that sidesteps the arithmetic question of whether engagement has reduced the actual emissions of those companies.
The Fiduciary Arithmetic
The House committee’s letter frames the CETF loss as a potential violation of the “exclusive benefit rule,” a principle rooted in common law and codified for private plans at Internal Revenue Code Section 401(a). Because CalPERS is a governmental plan, it is not directly subject to ERISA, but Section 401(a) still requires that qualified pension plan assets be held for the “exclusive benefit” of employees and their beneficiaries. Losing that tax-qualified status would be catastrophic for any plan.
The data behind the concern is not new. A Boston College Center for Retirement Research study of state pension funds found that ESG-oriented investment strategies reduced retiree returns by between 0.70% and 0.90% per year, with most of the underperformance attributable to higher fees — averaging 0.80% above comparable conventional mandates. Applied to a $500 billion portfolio across two decades, that spread compounds into tens of billions of dollars in foregone retirement security.
CalPERS’ own long-run returns illustrate the stakes. Over the past 20 years, the system has averaged 6.8% annually, while its sister fund CalSTRS averaged 7.6%. Both lag the S&P 500’s 10.4% average over the same period — a gap that, compounded over a working lifetime, translates into roughly half the terminal balance a plain-vanilla index investor would have reached. CalPERS’ current funded status stands at 82% as of September 30, 2025, meaning roughly $100 billion in unfunded promises still overhang the state’s balance sheet. Earlier estimates pegged that unfunded liability as high as $180 billion.
What Comes Next
The House committee’s February 27 deadline has passed; CalPERS has confirmed receipt of the letter and said it is “reviewing” the request, adding in a statement attributed to spokesperson Abram Arredondo that the system had “nothing further to add” while the Congressional inquiry is ongoing. The fund’s board has not publicly addressed whether it will revise the CETF’s valuation methodology, claw back any fees, or modify the broader $100 billion climate mandate in light of the loss.
California Assemblyman Carl DeMaio, who has separately called for a federal Department of Justice investigation into what he describes as roughly $3 billion in cumulative CalPERS losses on green-energy commitments since 2007, has signaled he will press for public hearings at the state level. House Committee staff have indicated that if the records produced by CalPERS reveal material breaches of the exclusive benefit rule, the matter could be referred to the Department of Labor or the Department of Justice for further action — a step that would move the dispute from political theater to potential litigation.
What remains unknown is whether the CETF’s failures were driven by the idiosyncratic collapse of first-generation cleantech, by governance lapses inside CalPERS’ private equity office, or by a structural willingness to sacrifice returns for a policy objective. Filings alone cannot resolve that question; only the internal memoranda now sought by the House committee can. Until those documents are produced, roughly two million California workers and retirees are left with a 71% loss, a $22 million fee bill, and a fund manager that has told them the details are none of their business.