# Charter Oak Carbon
Charter Oak Carbon is the name under which Charter Oak Carbon Fund I LP, a Delaware limited partnership and venture capital fund based in [Stamford, Connecticut](https://www.edgepedia.org/stamford-connecticut), filed its only securities offering, a Form D notice of exempt offering filed on December 13, 2022 reporting USD 144.94 million sold toward a USD 300 million target.[1](https://www.sec.gov/Archives/edgar/data/1957126/000195712622000001/0001957126-22-000001-index.htm) • [2](https://www.sec.gov/Archives/edgar/data/1957126/0001957126-22-000001.txt) The fund is led by Heath Watkin and [Brad Walker](https://www.edgepedia.org/brad-walker), who are listed in the filing as its executive officers, directors, and promoters.[2](https://www.sec.gov/Archives/edgar/data/1957126/0001957126-22-000001.txt)
| Key fact | Detail |
|---|---|
| Entity | Charter Oak Carbon Fund I LP, a Delaware limited partnership[1](https://www.sec.gov/Archives/edgar/data/1957126/000195712622000001/0001957126-22-000001-index.htm) |
| Classification | Pooled investment fund, venture capital fund[2](https://www.sec.gov/Archives/edgar/data/1957126/0001957126-22-000001.txt) |
| Address | 65 High Ridge Road #429, Stamford, Connecticut 06905[1](https://www.sec.gov/Archives/edgar/data/1957126/000195712622000001/0001957126-22-000001-index.htm) |
| Offering target | USD 300,000,000[2](https://www.sec.gov/Archives/edgar/data/1957126/0001957126-22-000001.txt) |
| Amount sold | USD 144,940,000 to 31 investors as of December 13, 2022[2](https://www.sec.gov/Archives/edgar/data/1957126/0001957126-22-000001.txt) |
| Minimum outside investment | USD 1,000,000; first sale December 1, 2022[2](https://www.sec.gov/Archives/edgar/data/1957126/0001957126-22-000001.txt) |
| Key people | Heath Watkin (signed as Managing Member of the GP) and Brad Walker[2](https://www.sec.gov/Archives/edgar/data/1957126/0001957126-22-000001.txt) |
| Status (through 2026) | LEI record ACTIVE; no new SEC filings after December 2022[3](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&filenum=021-467280) • [4](https://americanlei.com/detailed-information/45740256/25490071NVJQ2KSY7435/charter-oak-carbon-fund-i-lp/) |
## Charter Oak Carbon Fund I LP (by the numbers)
The fund's Form D, the notice private funds file for exempt offerings under Regulation D, was filed on December 13, 2022 under SEC file number 021-467280.[1](https://www.sec.gov/Archives/edgar/data/1957126/000195712622000001/0001957126-22-000001-index.htm) It reported a total offering target of USD 300 million, with USD 144,940,000 sold to 31 investors as of the filing date and USD 155,060,000 remaining.[2](https://www.sec.gov/Archives/edgar/data/1957126/0001957126-22-000001.txt) The first sale occurred on December 1, 2022, twelve days before the filing, and the minimum investment accepted from outside investors was USD 1,000,000.[2](https://www.sec.gov/Archives/edgar/data/1957126/0001957126-22-000001.txt) On the filing's classification questions the fund identified itself as a pooled investment fund in the venture capital fund category and stated it does not rely on Investment Company Act registration.[2](https://www.sec.gov/Archives/edgar/data/1957126/0001957126-22-000001.txt)
The Form D records the fund's fiscal year end as December 31 and does not by itself disclose the fund's investment strategy, target asset types, or geography.[1](https://www.sec.gov/Archives/edgar/data/1957126/000195712622000001/0001957126-22-000001-index.htm) • [2](https://www.sec.gov/Archives/edgar/data/1957126/0001957126-22-000001.txt)
## Founding and people
The filing names two individuals in connection with the fund: Heath Watkin and Brad Walker, each listed as Executive Officer, Director, and Promoter.[2](https://www.sec.gov/Archives/edgar/data/1957126/0001957126-22-000001.txt) Heath Watkin signed the Form D on December 13, 2022 as Managing Member of the general partner.[2](https://www.sec.gov/Archives/edgar/data/1957126/0001957126-22-000001.txt) No independent biographical coverage of either person, and no description of their prior roles, appears in the public record retrieved for this article; the filing itself is the only source for their involvement.
## Identity and Connecticut base
The fund's legal domicile is Delaware, while its business address is a Stamford, Connecticut mailing address.[1](https://www.sec.gov/Archives/edgar/data/1957126/000195712622000001/0001957126-22-000001-index.htm)
## Status through September 2026
SEC EDGAR lists one filing for the entity, the December 13, 2022 Form D; no follow-on amendment reporting a completed or terminated offering, and no filing for a second fund, appears through retrieval in 2026.[3](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&filenum=021-467280) The fund's [Legal Entity Identifier](https://www.edgepedia.org/legal-entity-identifier) record, 25490071NVJQ2KSY7435, shows the partnership registered on August 19, 2022, status ACTIVE, with record updates in December 2024, and November 2025 and the next renewal due November 19, 2026.[4](https://americanlei.com/detailed-information/45740256/25490071NVJQ2KSY7435/charter-oak-carbon-fund-i-lp/) Taken together, the record shows an entity that has maintained its legal registrations but with no publicly reported new funds, deals, hires, or wind-down since its 2022 filing.
## References
1. [SEC EDGAR Form D filing index — Charter Oak Carbon Fund I LP (Accession 0001957126-22-000001)](https://www.sec.gov/Archives/edgar/data/1957126/000195712622000001/0001957126-22-000001-index.htm)
2. [SEC Form D full text — Charter Oak Carbon Fund I LP (filed 2022-12-13)](https://www.sec.gov/Archives/edgar/data/1957126/0001957126-22-000001.txt)
3. [SEC EDGAR filing index for Charter Oak Carbon Fund I LP (CIK 0001957126)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&filenum=021-467280)
4. [Charter Oak Carbon Fund I LP — LEI record 25490071NVJQ2KSY7435 (American LEI)](https://americanlei.com/detailed-information/45740256/25490071NVJQ2KSY7435/charter-oak-carbon-fund-i-lp/)
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*Topic: Encyclopedia › Society and history › Economics and business › Finance › Venture capital and private equity › Venture capital firms of the Americas › Climate, energy, and sustainability investors*
*Initially written Sep 17, 2026 · Edited: Oct 11, 2026; Oct 15, 2026*
*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*
License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license