INDEPENDENT VERDICT
NH Elm Coulee Investments LP is a verifiable 2026 Delaware private investment vehicle tied strongly to North Hudson Resource Partners, but its real significance emerges only after reconstructing North Hudson's prior activity in the Elm Coulee oil field. The August 28 Form D uses North Hudson's Houston headquarters at 1106 Witte Road, Suite 100, its 713-936-6570 telephone number and Mark Bisso as executive officer, promoter and filing signatory. The issuer is classified as an Other Investment Fund, relies on Rule 506(b), claims both Sections 3(c)(1) and 3(c)(7), offers equity and pooled investment fund interests, and reported first sale yet to occur, $0 sold and zero investors. The filing therefore confirms formation of a new capital vehicle but does not disclose a target size, underlying asset purchase price or current NAV.
The name "Elm Coulee" is unusually informative because North Hudson already had a substantial economic relationship with that exact oil field before this fund existed. In May 2025, TXO Partners announced an agreement with White Rock Energy, a Quantum Capital Group portfolio company, to acquire producing assets in the Elm Coulee field in Montana and North Dakota. TXO said its own cash consideration would be approximately $350 million and that North Hudson affiliates would acquire a 30% non-operated interest; including North Hudson's participation, total consideration for the White Rock Elm Coulee properties was stated at approximately $475 million. The transaction closed on July 31, 2025. One year later, North Hudson created an issuer explicitly called NH Elm Coulee Investments, making the new fund much more plausibly connected to an existing operating relationship than to a generic energy strategy.
THE SECOND ELM COULEE CAPITAL EVENT
The chronology in August and September 2026 is the strongest part of the research. NH Elm Coulee Investments filed at 2:05 p.m. on August 28. Less than two hours later on the same day, White Rock Opportunities Fund I, L.P. filed its own new Form D. White Rock's vehicle was a 2026 Delaware Private Equity Fund, also using Rule 506(b), with first sale yet to occur, $0 sold and an indefinite offering; unlike the North Hudson vehicle, it named Jefferies LLC in the sales-compensation section and listed White Rock executives including Charles Bray, Rusty Ginnetti and Gayle McCrory. The two vehicles therefore have separate CIKs, managers, addresses and legal identities, but their same-day formation becomes important because of what happened next.
On September 14, North Hudson publicly announced that White Rock had closed a continuation vehicle called White Rock Opportunities Fund I and that North Hudson Resource Partners and affiliated funds provided the lead commitment. White Rock said the continuation vehicle allowed existing Fund II investors to crystallize their return while permitting White Rock to continue owning and developing the portfolio, with management also investing meaningful capital. The assets were described as being in the Williston and Permian Basins, producing more than 12,000 net Boe/d across nearly 170,000 acres. Mark Bisso specifically said the transaction allowed North Hudson to continue partnering with a management team that had pioneered the redevelopment of the Elm Coulee field.
The timing creates a strong but still incomplete linkage. NH Elm Coulee Investments was established before the White Rock continuation transaction was publicly announced; White Rock Opportunities Fund I was formed the same day; and North Hudson soon disclosed that its affiliated funds were providing anchor capital to that exact White Rock vehicle. Those facts make it reasonable to investigate NH Elm Coulee Investments as a possible dedicated North Hudson sleeve for part of the continuation investment. However, neither Form D states that NH Elm Coulee Investments owns White Rock Opportunities Fund I, and the public continuation announcement does not name NH Elm Coulee Investments individually. FilingDossier therefore treats that relationship as a strong structural lead rather than a confirmed ownership fact.
FROM A $475M ASSET PURCHASE TO A CONTINUATION VEHICLE
The 2025 transaction and the 2026 continuation deal represent two different ways North Hudson can gain exposure to White Rock and Elm Coulee. In the first transaction, North Hudson partnered with public operator TXO in a direct producing-asset acquisition. TXO's SEC filings confirm that TXO and North Hudson jointly completed the White Rock acquisition on July 31, 2025, after agreeing that North Hudson affiliates would own a 30% non-operated interest. The purchased properties were producing assets in the Elm Coulee field spanning Montana and North Dakota, and TXO described the broader property package as approximately $475 million of total consideration before customary adjustments.
The 2026 White Rock continuation vehicle is structurally different. Instead of acquiring one defined block of assets alongside TXO, North Hudson became the anchor investor in a new vehicle extending White Rock's ownership of its existing Fund II platform. White Rock said the portfolio now contains assets in both the Williston and Permian Basins, so the continuation transaction should not automatically be treated as an Elm Coulee-only fund. That difference may explain why North Hudson created a separately named "Elm Coulee Investments" vehicle while White Rock created the broader Opportunities Fund I, but public materials do not yet provide enough evidence to prove the exact allocation.
This sequence is particularly interesting because continuation transactions can reset ownership without forcing the underlying operating assets to be sold. Existing White Rock Fund II investors can receive liquidity, continuing investors can roll exposure, management can reinvest and new capital such as North Hudson's can acquire an economic position at a newly negotiated valuation. For a new North Hudson investor, that means the key diligence questions are not merely how many wells exist, but what valuation was placed on the continuation assets, how much of the investment relates specifically to Elm Coulee, what interests were acquired from legacy investors and how new capital ranks economically beside White Rock management and any rolling Fund II investors.
NORTH HUDSON'S NON-OPERATED STRATEGY EXPLAINS THE STRUCTURE
North Hudson is not a new oil-and-gas sponsor built around this single transaction. The firm describes itself as a Houston-based energy investment manager focused on upstream and midstream opportunities and has developed a large specialization in non-operated working interests. In May 2025, North Hudson closed Production Partners V at its $344 million hard cap and said the firm had reached approximately $1.4 billion of AUM at that time. North Hudson reported that its non-operated funds had acquired more than $1.3 billion of assets over the prior five years and had worked with more than 30 operators, while its portfolio contained more than 1,600 horizontal non-operated wells across basins including the Permian, Williston, Haynesville, Utica, DJ and San Juan.
By September 2026, North Hudson's own White Rock continuation announcement said platform AUM had increased to more than $2.1 billion. These are firm-level figures and should not be used as NH Elm Coulee Investments AUM. The new vehicle's Form D declines to disclose NAV and reports no completed sales. What the North Hudson history does demonstrate is that the Elm Coulee vehicle fits an established strategy: North Hudson frequently supplies capital while another operator controls day-to-day field operations. In the TXO transaction, North Hudson took a non-operated position while TXO retained the controlling operating interest; in the White Rock continuation vehicle, North Hudson again provides capital while White Rock management continues operating and developing the assets.
Mark Bisso's background also fits this approach. North Hudson identifies him as Managing Partner with roughly 25 years of energy finance and private-equity experience. Before founding North Hudson, Bisso was Co-Head of Global Energy at Oz Management, where he managed private energy investments, and earlier spent 11 years at ArcLight Capital Partners investing across upstream and midstream energy. His presence on the new Form D is therefore not merely administrative; he is the same North Hudson investment executive publicly quoted in both Production Partners and White Rock transaction announcements.
ELM COULEE IS A REAL OPERATING BASIN, NOT AN INTERNAL FUND CODE
Unlike many Form D names that reveal nothing about the underlying investment, Elm Coulee corresponds to a specific and historically important oil-producing area. The Elm Coulee field sits in the Williston Basin across eastern Montana and nearby North Dakota and is associated with production from the Bakken formation. Montana geological materials describe Elm Coulee as the birthplace of the modern Bakken oil boom, where horizontal drilling helped demonstrate the commercial potential of the Middle Bakken. That geological context matters because the new fund name is geographically and economically consistent with North Hudson's documented 2025 acquisition rather than appearing to be an arbitrary internal code.
The investment risk is nevertheless different from owning a generic diversified energy fund. If NH Elm Coulee Investments is concentrated around one field, one operating relationship or a limited set of continuation assets, returns can depend heavily on oil prices, well decline curves, drilling results, workover economics, operating costs, transportation differentials and future development decisions made by third-party operators. A non-operated investor also has less direct control over daily field decisions even though it shares the capital requirements and economic results of the wells. North Hudson's strategy is built around selecting operators and assets where it believes those economics are attractive, but investors still need the vehicle-specific ownership and reserve data rather than relying on firm-wide well counts.
FINAL ASSESSMENT
NH Elm Coulee Investments is unusually well suited to transaction-chain research because the SEC filing itself says almost nothing about the underlying asset while the surrounding public record says a great deal. The August 28 filing confirms a new North Hudson-linked pooled fund with Mark Bisso, the exact North Hudson headquarters, Rule 506(b), dual 3(c)(1)/3(c)(7) exclusions and no completed first sale. Independent SEC and company records confirm that North Hudson had already acquired a 30% non-operated interest in White Rock's Elm Coulee assets alongside TXO in the approximately $475 million 2025 transaction.
The more distinctive evidence appears in 2026. NH Elm Coulee Investments and White Rock Opportunities Fund I filed new Form D notices on the same day, and just over two weeks later North Hudson announced that it and affiliated funds were the anchor capital provider for White Rock's newly completed continuation vehicle. White Rock's portfolio includes Williston and Permian assets, while Mark Bisso specifically linked the transaction to White Rock's history redeveloping Elm Coulee. That sequence creates a credible hypothesis that NH Elm Coulee Investments may be one of North Hudson's dedicated investment sleeves associated with the continuation transaction, but the public documents reviewed do not yet establish the exact ownership chain.
That evidence boundary is the most important conclusion. FilingDossier can verify North Hudson, Mark Bisso, the 2025 TXO/White Rock Elm Coulee acquisition, the two same-day August 2026 Form D filings and North Hudson's September anchor investment in White Rock Opportunities Fund I. What cannot yet be verified publicly is whether NH Elm Coulee Investments LP directly owns an interest in White Rock Opportunities Fund I, holds only Elm Coulee assets from that portfolio, or represents a different North Hudson investment connected to the same field. Investors should obtain the LP agreement, subscription materials, asset schedule, ownership diagram and continuation-vehicle waterfall before treating those structures as economically identical.
Form D is an exempt-offering notice. It is not SEC approval of NH Elm Coulee Investments, North Hudson Resource Partners, White Rock Resources, TXO Partners or any oil-and-gas investment.
SEC SNAPSHOT
ISSUER: NH Elm Coulee Investments LP | CIK: 0002146617 | SEC FILE NO.: 021-595798 | FILM NO.: 261338235 | ACCESSION NO.: 0002146617-26-000001 | FILED / EFFECTIVE: August 28, 2026
ENTITY: Delaware Limited Partnership | FORMATION YEAR: 2026 | ADDRESS: 1106 Witte Road, Suite 100, Houston, TX 77055 | PHONE: 713-936-6570
INDUSTRY: Pooled Investment Fund - Other Investment Fund | EXEMPTION: Regulation D Rule 506(b) | INVESTMENT COMPANY ACT: Sections 3(c)(1) and 3(c)(7)
SECURITIES: Equity | Pooled Investment Fund Interests | OFFERING DURATION: One year or less | FIRST SALE: Yet to occur | TOTAL OFFERING: Indefinite | AMOUNT SOLD: $0 | INVESTORS: 0 | MINIMUM INVESTMENT FIELD: $0 | NAV: Declined to disclose
RELATED PERSON / PROMOTER / FORM D SIGNATORY: Mark Bisso | TITLE ON SIGNATURE: Managing Member of the GP of the GP of the Issuer
FORM D FEE DISCLOSURE: General Partner is entitled to carried interest and management company is entitled to a management fee; amounts are disclosed in confidential offering materials.
MANAGEMENT PLATFORM: North Hudson Resource Partners LP | CRD: 297155 | SEC NO.: 801-118888 | SEC-REGISTERED SINCE: June 10, 2020
NORTH HUDSON CURRENT PUBLIC PLATFORM AUM: More than $2.1B as of September 14, 2026. THIS IS FIRM-LEVEL AUM, NOT NH ELM COULEE INVESTMENTS NAV OR AMOUNT SOLD.
2025 ELM COULEE TRANSACTION: TXO Partners and North Hudson acquired producing assets from White Rock Energy in the Elm Coulee field. TXO announced approximately $350M of its own consideration and said North Hudson affiliates would acquire a 30% non-operated interest; total transaction consideration including North Hudson was approximately $475M before adjustments.
TRANSACTION CLOSED: July 31, 2025.
SAME-DAY 2026 FILING: White Rock Opportunities Fund I LP also filed a new Form D on August 28, 2026. It is a separate White Rock-managed Private Equity Fund using Rule 506(b) and 3(c)(7), with Jefferies LLC identified in the sales-compensation section.
2026 CONTINUATION VEHICLE: White Rock announced on September 14, 2026 that White Rock Opportunities Fund I had closed as a continuation vehicle for its Fund II platform, with North Hudson Resource Partners and affiliated funds providing the lead commitment and White Rock management also investing.
WHITE ROCK CONTINUATION PORTFOLIO: Assets in the Williston and Permian Basins | more than 12,000 net Boe/d production | almost 170,000 acres according to the September 2026 transaction announcement.
IMPORTANT CONNECTION LIMITATION: Public evidence strongly connects North Hudson, Elm Coulee, the same-day White Rock fund formation and North Hudson's continuation-vehicle investment, but no reviewed public document directly states that NH Elm Coulee Investments LP is the legal investor in White Rock Opportunities Fund I. FilingDossier therefore treats that connection as a high-value diligence lead rather than a confirmed ownership fact.
CORE INDEPENDENT FINDING: NH Elm Coulee Investments appears after North Hudson had already established a major economic position in Elm Coulee and immediately before North Hudson became anchor investor in a White Rock continuation vehicle. The unusual sequence suggests a second-stage investment architecture around an existing operating relationship rather than a generic new energy fund, making the exact ownership path between the North Hudson vehicle, White Rock continuation fund and Elm Coulee assets the central diligence question.
Form D is an exempt-offering notice and is not an SEC-issued certificate, approval or endorsement.