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Investors / United States / EnCap Flatrock Midstream

EnCap Flatrock Midstream

Venture capital · San Antonio, TX, United States · North America

efmidstream.com

EnCap Flatrock Midstream is a venture capital firm focused on the North American midstream energy sector, founded in 2008 by Flatrock Energy Advisors and EnCap Investments L.P. It partners with seasoned management teams, providing capital, expertise and operational support to build midstream businesses and hard-asset infrastructure.

Invests inEducationHealthcare & Biotech

In its own wordsmidstreamenergyoil and gasinfrastructurepipelinesnatural gas

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10portfolio companies
0funding rounds on record
Seedstages it states
Indefinite offeringlatest fund2026

EnCap Flatrock Midstream lists 10 checked portfolio companies on its own site. Its largest themes are Education (58%) and Healthcare & Biotech (42%). 80% of its companies are based in United States.

No funding round on record names EnCap Flatrock Midstream yet, so the figures come from its portfolio page.

Round figures show recent activity, not EnCap Flatrock Midstream's whole history. Rounds on record name 0 companies; its own site lists 10. Funding rounds are complete from mid-2025, so counts and the yearly trend undercount a firm that invested before then. The portfolio, themes and places come from its own site and are not affected.

Investment themes

share of its checked companies

This firmAll checked companies

Show as a table
Investment themes
This firmAll checked companies
Education58%7%
Healthcare & Biotech42%15%

Investor profile

percentile among all firms
Portfolio size: 10 companiesRecent activity: 0 rounds in 12 monthsEarly stage: 0% of entries at pre-seed or seedEvidence: 0% of companies confirmed by a roundSector focus: 58% in its largest sectorReach: 3 countriesPortfolio size23th pctRecent activity46th pctEarly stage54th pctEvidence52th pctSector focus88th pctReach59th pct
This firmMedian of all firms
Show as a table
EnCap Flatrock Midstream compared with all firms
MeasurePercentile of all firmsValue
Portfolio size23th10 companies
Recent activity46th0 rounds in 12 months
Early stage54th0% of entries at pre-seed or seed
Evidence52th0% of companies confirmed by a round
Sector focus88th58% in its largest sector
Reach59th3 countries

Its portfolio companies

where they are based, and what their own sites show

Headquarters

Site status

  • Site answers10100%
  • No longer answers00%
  • Points to another company00%
  • Parked or sold domain00%

A site that stops answering three checks in a row is counted as no longer answering; that is not proof of closure. A site that points to another company is often an acquisition.

Compare EnCap Flatrock Midstream head to head

portfolio size, rounds, entry stages, themes and the companies both back

Three or more firms at once: portfolio overlap.

Funds

from public registers and its site
EnCap Flatrock Midstream Fund VI-B, L.P.2026 · Indefinite offering, SEC Form D
EnCap Flatrock Midstream Fund VI, L.P.2026 · Indefinite offering, SEC Form D

Portfolio

10 companies checked against their own sites
CompanyWhat it doesThemesFirst round with itEvidence
Aspen Midstreamaspenmidstream.com · United StatesAspen Midstream constructs and operates midstream assets for oil and gas producers
EducationHealthcare & Biotech
Portfolio page
Brazos Midstreambrazosmidstream.com · United StatesBrazos Midstream is a privately held midstream company that develops and grows large-scale energy infrastructure.
EducationHealthcare & Biotech
Portfolio page
Clearfork Midstreamclearforkmidstream.com · United StatesClearfork Midstream provides midstream services for oil and gas producers in the Haynesville Shale
EducationHealthcare & Biotech
Portfolio page
Edgewater Midstreamedgewatermidstream.com · United StatesEdgewater Midstream is focused on the acquisition, development and operation of pipelines and terminals in proximity to major North American petroleum trading hubs and demand centers.
EducationHealthcare & Biotech
Portfolio page
Frontier Energyfrontierenergyllc.com · USAThe company develops midstream assets serving the needs of the energy industry.
EducationEducation
Portfolio page
Greenfield Midstreamgreenfieldmidstream.com · United StatesGreenfield Midstream serves producers through the organic development of midstream assets in underserved areas across North America.
EducationHealthcare & Biotech
Portfolio page
Manchester Energymanchesterenergy.com · United StatesManchester Energy transforms businesses and realizes value across the energy value chain
EducationHealthcare & Biotech
Portfolio page
Moda Midstream IImodamidstream.com · United StatesModa Midstream is an independent midstream solutions provider focused on the acquisition and development of reliable last-mile storage and transportation solutions
Education
Portfolio page
M6 Midstreammomentummidstream.com · United StatesThe company develops, builds, and operates pipelines to connect natural gas supply to markets and demand centers.
EducationHealthcare & Biotech
Portfolio page
Rangeland Midstream Canadarangelandmidstream.ca · CanadaThe company focuses on identifying opportunities to contract, construct and operate midstream solutions for the crude oil, natural gas, and natural gas liquids markets.
EducationHealthcare & Biotech
Portfolio page

About this data

site last read 5 Nov 2026
The homepage of EnCap Flatrock Midstream, as last read
efmidstream.com as VCinfo last read it
Site
efmidstream.com
Last read
5 Nov 2026
Watching since
6 Nov 2026
Companies checked
10

Rates come from what VCinfo has observed since observation_start. Firms tend to remove companies that closed, so early rates understate reality. A company leaving a portfolio page does not mean it closed or exited. An unreachable site means our checks failed, nothing more.

How we grade the data

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GET /v1/firms/efmidstream.com/portfolio
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