# Wisconsin Regulator Upholds $7B Collateral Requirement for Oracle's 1GW Lighthouse Campus > Source: > Published: 2026-07-23 12:23:49.872901+00:00 # Wisconsin Regulator Upholds $7B Collateral Requirement for Oracle's 1GW Lighthouse Campus - Wisconsin PSC declined to reopen its April 2026 order requiring data center operators rated below A-/A3 to post collateral with utility We Energies [[1]](https://www.theregister.com/ai-and-ml/2026/07/21/oracle-faces-100m-annual-bill-to-back-wisconsin-datacenter-power-promises/5275728) - Oracle's BBB S&P rating triggers an estimated $7B collateral obligation, costing more than $100M annually in financing fees [[2]](https://www.datacenterknowledge.com/regulations/oracle-lawsuit-tests-wisconsin-ai-data-center-credit-rules) - The ~1GW Lighthouse campus in Port Washington represents a ~$15B investment by Oracle, Vantage Data Centers, and OpenAI under the Stargate partnership [[3]](https://www.businesswire.com/news/home/20251022873578/en) - We Energies uniquely pegs collateral to the net book value of dedicated generating assets rather than monthly bills, producing a far larger security requirement than comparable tariffs in Indiana or Ohio [[4]](https://www.latitudemedia.com/news/does-oracle-actually-have-a-case-against-wisconsins-data-center-rule/) - Oracle filed suit in Ozaukee County court on June 19, 2026, and has offered to withdraw if the PSC reopens proceedings [[4]](https://www.latitudemedia.com/news/does-oracle-actually-have-a-case-against-wisconsins-data-center-rule/) The Wisconsin Public Service Commission has declined to reopen or overturn its April 2026 order requiring hyperscale data center operators to post financial security before taking power service — a decision that saddles Oracle with an estimated $7 billion collateral obligation and more than $100 million in annual financing costs for the nearly 1GW Lighthouse campus in Port Washington [[1]](https://www.theregister.com/ai-and-ml/2026/07/21/oracle-faces-100m-annual-bill-to-back-wisconsin-datacenter-power-promises/5275728) [2]. The Lighthouse campus, a joint development by Oracle, Vantage Data Centers, and OpenAI under the Stargate infrastructure partnership, represents roughly $15 billion in planned investment across 672 acres. It is one of the largest private investments in Wisconsin history and a centerpiece of Oracle's $300 billion computing infrastructure agreement with OpenAI [[3]](https://www.businesswire.com/news/home/20251022873578/en) [2]. Oracle's S&P credit rating of BBB — one notch below the A- threshold the PSC imposed on We Energies' new "very large customer" tariff — triggers the collateral requirement. The company filed suit in Ozaukee County court on June 19 challenging the tariff, while simultaneously petitioning the PSC to reopen the proceeding. The commission rejected the rehearing request [[4]](https://www.latitudemedia.com/news/does-oracle-actually-have-a-case-against-wisconsins-data-center-rule/) [1]. ## The Tariff and Why It Hits Oracle Hard When the PSC approved We Energies' new very large customer (VLC) and bespoke resources tariff in April 2026, it imposed a credit-rating floor: any data center developer with an S&P rating below A- or a Moody's rating below A3 must post collateral before taking service. The original proposal from We Energies and the data center developers had set the bar lower at BBB/Baa2 with utility discretion to waive the requirement; the commission unilaterally raised it [[2]](https://www.datacenterknowledge.com/regulations/oracle-lawsuit-tests-wisconsin-ai-data-center-credit-rules) [4]. What makes Wisconsin's tariff unusually expensive is how We Energies calculates the security deposit. Rather than basing collateral on a multiple of monthly bills — the standard approach in most jurisdictions — We Energies pegs it to the net book value of dedicated generating resources built to serve the customer. For a nearly 1GW campus requiring purpose-built power plants, that figure reaches approximately $7 billion, compared to roughly $1 billion under bill-based formulas used in Indiana and Ohio [4]. The PSC said the rules are designed to protect existing ratepayers from bearing the costs of expensive grid expansion tied to AI-related load growth. If Oracle were to abandon the facility, ratepayers would otherwise be left with stranded generation assets [1]. ## Oracle's Credit Position S&P recently downgraded Oracle from BBB to BBB-, citing the company's heavy borrowing to finance AI infrastructure. The rating agency noted that OpenAI accounts for roughly half of the $638 billion in remaining performance obligations on Oracle's books [1]. To manage the financial exposure, Oracle secured a $10 billion credit line from Bank of America and JPMorgan Chase. The company stated it 'remains committed to paying its full share for energy' and characterized the project as being 'developed responsibly in partnership with the community' [1]. ## Legal Challenge and Comparative Context Oracle filed suit in Ozaukee County court on June 19, 2026, asking a judge to review the PSC's tariff order. An Oracle vice president described the Wisconsin tariff as 'one of the most stringent' she had encountered. The company offered to withdraw the lawsuit if the PSC agrees to reopen the proceeding; the commission has thirty days to respond [4]. The A-/A3 credit-rating threshold itself is not unique — Indiana and Ohio impose identical standards. Amazon, Google, and Microsoft have accepted comparable terms in other jurisdictions, and Microsoft actually recommended this framework to Wisconsin regulators [4]. The distinguishing factor is the collateral calculation method tied to net book value of generation assets. Wisconsin also layers on a tangible net worth requirement: operators must demonstrate either twice the security amount in net worth or ten times that figure in liquidity. No other utility using an A-/A3 threshold imposes this dual test, according to analysis by Latitude Intelligence [4]. For broader context, Santee Cooper in South Carolina requires up to 180 months of minimum bills as security for large customers — potentially exceeding $8.5 billion. Wisconsin's requirement ranks among the highest nationally but is not unprecedented [4]. ## What's Next The PSC's refusal to reopen the proceeding leaves Oracle with two paths: prevail in the Ozaukee County lawsuit or post the collateral and absorb the financing costs. The commission still has a pending response window on Oracle's offer to withdraw litigation in exchange for a reopened proceeding [4]. The outcome carries implications beyond Wisconsin. As hyperscalers push gigawatt-scale campuses into new markets, utility commissions across the country are designing tariffs that balance ratepayer protection with the economic development benefits of massive data center investments. Wisconsin's approach — tying collateral to generation asset values rather than bill multiples — represents one of the more aggressive models and could influence regulatory frameworks in other states [[2]](https://www.datacenterknowledge.com/regulations/oracle-lawsuit-tests-wisconsin-ai-data-center-credit-rules) [4]. ## Companies mentioned ## Further sources [[1] The Register — Oracle faces $100M annual bill to back Wisconsin datacenter powe… ↗](https://www.theregister.com/ai-and-ml/2026/07/21/oracle-faces-100m-annual-bill-to-back-wisconsin-datacenter-power-promises/5275728) [[2] Data Center Knowledge — Oracle Suit in Wisconsin Tests States' AI Credit Rules ↗](https://www.datacenterknowledge.com/regulations/oracle-lawsuit-tests-wisconsin-ai-data-center-credit-rules) [[3] BusinessWire — OpenAI, Oracle and Vantage Data Centers Announce Stargate Data C… ↗](https://www.businesswire.com/news/home/20251022873578/en) [[4] Latitude Media — Does Oracle actually have a case against Wisconsin's data cent… ↗](https://www.latitudemedia.com/news/does-oracle-actually-have-a-case-against-wisconsins-data-center-rule/) The stories that matter, in one email. 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