Venture firm with private equity activity · probable Side Door Ventures is a global venture capital firm backing audacious founders building tomorrow’s life-changing companies. We’re sector-agnostic and invest in companies across software, life sciences, space, deep tech, blockchain, logistics, gaming, media, security, food, and financial services that aim to transform industries and improve lives.
Stated: Manufacturing, Consumer, Life sciences, Software and 1 more
Industries: Aerospace, defense and government (2 companies) · Software (1 company) · Life sciences (stated)
unsized2024 PE fund GAV not reported0 PE funds of 0investment professionals not trackedlast event Jan 27, 2026
Sidereal Capital
Stated: EBITDA $3.0M to $10.0M · EV $15.0M to $60.0M · equity check $8.0M to $25.0M · control · Industrial services, Industrials, Manufacturing
Industries: Industrial services (stated) · Manufacturing (stated)
Lower middle market2024 PE fund GAV $54.1M4 PE funds of 4, latest vintage 20246 investment professionalslast event Apr 27, 2022
We support exceptional entrepreneurs, providing capital, strategy, and a global network of energy leaders to help build the best companies.
Stated: Technology, Energy, Healthcare, Education
Industries: Software (stated) · Tech-enabled and IT services (stated) · Hardware and deep tech (stated)
Middle market2024 PE fund GAV $2.4B13 PE funds of 17, latest vintage 201820 investment professionalslast event Aug 31, 2026
Venture firm with private equity activity · probable ••• Locked
Stated: Life sciences, Technology, Industrials, Food and beverage and 5 more
Industries: Healthcare services (1 company) · Life sciences (1 company) · Software (stated)
Lower middle market2024 PE fund GAV $623M2 PE funds of 3, latest vintage 202442 investment professionalslast event Sep 1, 2026
••• Locked
Stated: Industrial services, Industrials, Manufacturing, Healthcare and 6 more
Industries: Software (stated) · Tech-enabled and IT services (stated) · Hardware and deep tech (stated)
unsized2024 PE fund GAV not reported1 PE fund of 1, latest vintage 20147 investment professionalslast event Sep 17, 2026
Private credit manager · probable ••• Locked
Stated: minority · Media and telecom, Software, Financial services
Industries: Software (stated) · Financial services (stated) · Media and telecom (stated)
Lower middle market2024 PE fund GAV $943M5 PE funds of 5, latest vintage 202127 investment professionalslast event Sep 14, 2026
••• Locked
Stated: EV $20.0M to $200M · Manufacturing, Consumer
Industries: Manufacturing (stated) · Consumer products and retail (stated) · Consumer services (stated)
Lower middle market2024 PE fund GAV $502M4 PE funds of 4, latest vintage 201818 investment professionalslast event Mar 28, 2013
••• Locked
Stated: EV $20.0M to $200M · equity check $20.0M to $50.0M · majority · Manufacturing, Distribution
Industries: Industrial services (2 companies) · Manufacturing (2 companies) · Software (1 company)
unsized2024 PE fund GAV not reported1 PE fund of 2, latest vintage 20202 platforms4 investment professionalslast event Sep 1, 2026
••• Locked
Stated: EBITDA $5.0M to $50.0M · Consumer, Food and beverage, Manufacturing
Industries: Consumer products and retail (1 company) · Consumer services (1 company) · Manufacturing (stated)
Lower middle market2024 PE fund GAV $960M14 PE funds of 14, latest vintage 20233 platforms19 investment professionalslast event May 25, 2021
••• Locked
Stated: EBITDA up to $15.0M · revenue $40.0M to $200M · EV up to $125M · Industrials, Manufacturing
Industries: Industrial services (stated) · Manufacturing (stated)
Lower middle market2024 PE fund GAV $83.0M6 PE funds of 6, latest vintage 20245 investment professionalslast event Mar 27, 2026
S••••• C••••••Newton, MA · s•••••••••.com · SEC exempt reporting adviser
Buyout firm••• Locked
Stated: revenue $5.0M to $20.0M · Software, Consumer
Industries: Software (stated) · Consumer products and retail (stated) · Consumer services (stated)
Lower middle market2024 PE fund GAV $32.9M8 PE funds of 8, latest vintage 20255 investment professionalslast event Mar 25, 2026
Hybrid manager · probable ••• Locked
Stated: Industrials, Manufacturing, Transportation and logistics, Chemicals and materials and 4 more
Industries: Software (stated) · Tech-enabled and IT services (stated) · Hardware and deep tech (stated)
Lower middle market2024 PE fund GAV $97.7M3 PE funds of 4, latest vintage 202239 investment professionalslast event Feb 13, 2012
S•••••• C••••••New York, NY · s•••••••••.com · SEC registered investment adviser
Buyout firm••• Locked
Stated: equity check $100M to $500M · minority · Aerospace and defense, Consumer, Transportation and logistics, Industrials and 3 more
Industries: Hardware and deep tech (1 company) · Manufacturing (1 company) · Transportation and logistics (1 company)
Middle market2024 PE fund GAV $4.0B17 PE funds of 17, latest vintage 20245 investment professionalslast event Aug 18, 2026
••• Locked
Stated: control · Healthcare, Technology, Software, Aerospace and defense and 15 more
Industries: Software (2 companies) · Business services (2 companies) · Tech-enabled and IT services (1 company)
Upper middle market2024 PE fund GAV $14B25 PE funds of 25, latest vintage 202462 investment professionalslast event Aug 31, 2026
••• Locked
Stated: EBITDA $5.0M to $100M · revenue $5.0M to $100M · control · Business services, Software, Technology
Industries: Software (stated) · Tech-enabled and IT services (stated) · Hardware and deep tech (stated)
unsized2024 PE fund GAV not reported1 PE fund of 11 investment professionallast event Sep 1, 2026
••• Locked
Stated: control · Building products, Software, Technology
Industries: Software (stated) · Tech-enabled and IT services (stated) · Hardware and deep tech (stated)
Middle market2024 PE fund GAV $3.0B9 PE funds of 10, latest vintage 202310 investment professionalslast event Sep 15, 2026
Hybrid manager · probable ••• Locked
Stated: Manufacturing, Distribution, Healthcare, Infrastructure and 2 more
Industries: Healthcare services (stated) · Life sciences (stated) · Manufacturing (stated)
unsized2024 PE fund GAV not reported0 PE funds of 0investment professionals not trackedlast event Nov 17, 2025
••• Locked
Stated: equity check $10.0M to $75.0M · Technology, Infrastructure, Software
Industries: Software (stated) · Tech-enabled and IT services (stated) · Hardware and deep tech (stated)
Lower middle market2024 PE fund GAV $983M16 PE funds of 17, latest vintage 20239 investment professionalslast event Sep 3, 2026
••• Locked
Stated: Distribution, Consumer, Financial services, Infrastructure and 1 more
Industries: Financial services (stated) · Distribution (stated) · Energy, utilities and infrastructure (stated)
Lower middle market2024 PE fund GAV $139M4 PE funds of 4, latest vintage 20222 investment professionalslast event May 3, 2012
••• Locked
Stated: revenue $10.0M to $50.0M · majority · Manufacturing
Industries: Software (1 company) · Manufacturing (stated)
Lower middle market2024 PE fund GAV $445M6 PE funds of 6, latest vintage 20234 investment professionalslast event Sep 17, 2026
Stated: revenue $10.0M to $100M · minority · Software, Healthcare, Financial services, Transportation and logistics and 1 more
Industries: Software (stated) · Healthcare services (stated) · Life sciences (stated)
Lower middle market2024 PE fund GAV $894M8 PE funds of 8, latest vintage 20241 investment professionallast event Jan 12, 2020
••• Locked
Stated: Manufacturing, Energy, Infrastructure
Industries: Manufacturing (stated) · Energy, utilities and infrastructure (stated)
Lower middle market2024 PE fund GAV $436M11 PE funds of 11, latest vintage 20258 investment professionalslast event Mar 10, 2026
••• Locked
Stated: Technology, Consumer, Financial services, Software
Industries: Software (22 companies) · Financial services (7 companies) · Tech-enabled and IT services (stated)
Lower middle market2024 PE fund GAV $67.7M12 PE funds of 12, latest vintage 20238 investment professionalslast event Jun 16, 2026
••• Locked
Stated: Technology, Software
Industries: Software (stated) · Tech-enabled and IT services (stated) · Hardware and deep tech (stated)
Middle market2024 PE fund GAV $1.3B9 PE funds of 14, latest vintage 20242 investment professionalslast event Sep 16, 2026
••• Locked
Stated: EBITDA $2.0M+ · revenue $15.0M to $50.0M · equity check $3.0M to $10.0M · control · Business services, Manufacturing
Industries: Energy, utilities and infrastructure (1 company) · Business services (stated) · Manufacturing (stated)
Lower middle market2024 PE fund GAV $3.9M1 PE fund of 3, latest vintage 20232 investment professionalslast event Sep 17, 2026
T•• B••••• G••••Washington, D.C., DC · b•••••.com · SEC registered investment adviser
Buyout firm••• Locked
Stated: EBITDA $1.0M to $5.0M · revenue $5.0M to $25.0M · Education
Industries: Software (1 company) · Education (stated)
Lower middle market2024 PE fund GAV $319M3 PE funds of 320 investment professionalslast event Apr 28, 2026
••• Locked
Stated: EBITDA $1.0M+ · EV $10.0M to $100M · equity check $2.0M to $20.0M · Manufacturing, Distribution, Healthcare, Energy
Industries: Healthcare services (stated) · Life sciences (stated) · Manufacturing (stated)
Lower middle market2024 PE fund GAV $199M10 PE funds of 101 platform4 investment professionalslast event Sep 17, 2026
Venture firm with private equity activity · probable ••• Locked
Stated: Transportation and logistics, Industrials, Healthcare, Consumer and 1 more
Industries: Healthcare services (stated) · Life sciences (stated) · Industrial services (stated)
Lower middle market2024 PE fund GAV $111M2 PE funds of 2, latest vintage 2015investment professionals not trackedlast event Mar 30, 2012
••• Locked
Stated: majority · Financial services, Education, Healthcare
Industries: Healthcare services (stated) · Life sciences (stated) · Financial services (stated)
Lower middle market2024 PE fund GAV $119M1 PE fund of 1, latest vintage 20245 investment professionalslast event Sep 1, 2026
T•• C•••• G••••Chicago, IL · c•••••••••.com · SEC registered investment adviser
Buyout firm · probable••• Locked
Stated: EBITDA $1.0M+ · revenue $5.0M+ · EV $15.0M+ · equity check $3.0M to $30.0M · Technology, Business services, Industrials, Healthcare and 4 more
Industries: Software (stated) · Tech-enabled and IT services (stated) · Hardware and deep tech (stated)
Lower middle market2024 PE fund GAV $115M1 PE fund of 1, latest vintage 2023investment professionals not trackedlast event Jan 25, 2024
Stated: control or majority or minority · Building products, Business services, Industrials, Technology and 4 more
Industries: Software (stated) · Tech-enabled and IT services (stated) · Hardware and deep tech (stated)
Middle market2024 PE fund GAV $1.1B7 PE funds of 7, latest vintage 202410 investment professionalslast event Sep 16, 2026
••• Locked
Stated: Industrials, Manufacturing
Industries: Industrial services (stated) · Manufacturing (stated)
Lower middle market2024 PE fund GAV $73.4M4 PE funds of 4, latest vintage 20239 investment professionalslast event Jun 24, 2019
••• Locked
Stated: Consumer, Technology, Software, Media and telecom and 2 more
Industries: Software (stated) · Tech-enabled and IT services (stated) · Hardware and deep tech (stated)
Lower middle market2024 PE fund GAV $25.0M2 PE funds of 2, latest vintage 2021investment professionals not trackedlast event Apr 20, 2016
T•• M••••••• L••Location unknown · t•••••••••.com · SEC registered investment adviser
Buyout firm••• Locked
Stated: Manufacturing, Life sciences, Infrastructure, Real estate
Industries: Software (1 company) · Life sciences (stated) · Manufacturing (stated)
Lower middle market2024 PE fund GAV $69.7M3 PE funds of 5, latest vintage 20248 investment professionalslast event Sep 17, 2026
••• Locked
Stated: control · Industrial services, Industrials, Manufacturing, Food and beverage
Industries: Industrial services (stated) · Manufacturing (stated) · Consumer products and retail (stated)
unsized2024 PE fund GAV not reported0 PE funds of 0investment professionals not trackedlast event Apr 17, 2026
••• Locked
Stated: majority · Manufacturing, Distribution
Industries: Manufacturing (stated) · Distribution (stated)
Lower middle market2024 PE fund GAV $523M2 PE funds of 2, latest vintage 202312 investment professionalslast event Jul 20, 2026
Hybrid manager · probable ••• Locked
Stated: Consumer, Energy, Education, Environmental services
Industries: Industrial services (stated) · Energy, utilities and infrastructure (stated) · Consumer products and retail (stated)
unsized2024 PE fund GAV not reported1 PE fund of 1, latest vintage 20151 investment professionallast event Sep 1, 2026
Hybrid manager · probable ••• Locked
Stated: Technology, Energy, Manufacturing, Building products
Industries: Software (stated) · Tech-enabled and IT services (stated) · Hardware and deep tech (stated)
unsized2024 PE fund GAV not reported0 PE funds of 2, latest vintage 2012investment professionals not trackedlast event Mar 13, 2024
T•••••• •••• L••New York, NY · t•••••••••.com · SEC registered investment adviser
Buyout firm · probableStated: Manufacturing, Consumer
Industries: Industrial services (1 company) · Consumer services (1 company) · Manufacturing (stated)
Middle market2024 PE fund GAV $1.1B20 PE funds of 20, latest vintage 202532 investment professionalslast event Sep 16, 2026
T•• C••••••Nashville, TN · t•••••••••.com · SEC registered investment adviser
Buyout firm••• Locked
Stated: revenue $10.0M to $150M · Manufacturing, Food and beverage
Industries: Manufacturing (stated) · Consumer products and retail (stated)
Lower middle market2024 PE fund GAV $372M9 PE funds of 9, latest vintage 20245 investment professionalslast event Apr 2, 2012
••• Locked
Stated: EBITDA $10.0M+ · equity check $10.0M to $50.0M · Technology, Real estate, Business services, Industrials and 1 more
Industries: Software (stated) · Tech-enabled and IT services (stated) · Hardware and deep tech (stated)
Lower middle market2024 PE fund GAV $274M1 PE fund of 1investment professionals not trackedlast event Feb 13, 2012
••• Locked
Stated: revenue $20.0M to $200M · control · Manufacturing, Consumer, Food and beverage, Franchising
Industries: Manufacturing (stated) · Consumer products and retail (stated) · Consumer services (stated)
Lower middle market2024 PE fund GAV $722M5 PE funds of 5, latest vintage 202215 investment professionalslast event Mar 27, 2026
Venture firm with private equity activity · probable ••• Locked
Stated: Manufacturing, Distribution, Technology, Food and beverage and 1 more
Industries: Software (6 companies) · Life sciences (2 companies) · Manufacturing (2 companies)
Large cap2024 PE fund GAV $63B67 PE funds of 81, latest vintage 20259 investment professionalslast event Apr 29, 2026
Hybrid manager · probable ••• Locked
Stated: EBITDA $5.0M to $20.0M · revenue $10.0M to $100M · Manufacturing, Technology, Transportation and logistics, Aerospace and defense and 2 more
Industries: Software (stated) · Tech-enabled and IT services (stated) · Hardware and deep tech (stated)
unsized2024 PE fund GAV not reported0 PE funds of 0investment professionals not trackedlast event Jun 9, 2026
••• Locked
Stated: EBITDA $3.0M to $15.0M · revenue $10.0M to $50.0M · equity check $10.0M to $30.0M · minority · Business services, Software
Industries: Software (1 company) · Tech-enabled and IT services (1 company) · Hardware and deep tech (1 company)
Lower middle market2024 PE fund GAV $85.6M3 PE funds of 3, latest vintage 20204 investment professionalslast event Feb 14, 2012
V•••• C••••••Austin, TX · v•••••••••.com · SEC exempt reporting adviser
Buyout firm••• Locked
Stated: revenue up to $100M · control · Business services, Technology, Software
Industries: Software (stated) · Tech-enabled and IT services (stated) · Hardware and deep tech (stated)
Lower middle market2024 PE fund GAV $95.5M9 PE funds of 9, latest vintage 20242 investment professionalslast event Mar 11, 2026
Real estate private equity · probable ••• Locked
Stated: equity check $200M+ · Healthcare, Education, Real estate, Consumer and 3 more
Industries: Healthcare services (2 companies) · Life sciences (2 companies) · Education (1 company)
unsized2024 PE fund GAV not reported4 PE funds of 125 platforms23 investment professionalslast event Nov 16, 2022
••• Locked
Stated: EBITDA $2.0M to $8.0M · revenue $10.0M to $60.0M · equity check $5.0M to $35.0M · control · Industrial services, Industrials, Manufacturing
Industries: Industrial services (stated) · Manufacturing (stated)
Lower middle market2024 PE fund GAV $76.9M2 PE funds of 2, latest vintage 20183 investment professionalslast event Mar 27, 2018
••• Locked
Stated: Software
Industries: Software (stated)
unsized2024 PE fund GAV not reported10 PE funds of 10, latest vintage 20221 investment professionallast event May 11, 2026
••• Locked
Stated: EBITDA $2.0M to $10.0M · control or minority · Business services, Healthcare, Technology, Manufacturing and 1 more
Industries: Software (stated) · Tech-enabled and IT services (stated) · Hardware and deep tech (stated)
Lower middle market2024 PE fund GAV $370M3 PE funds of 3, latest vintage 2010investment professionals not trackedlast event Feb 14, 2012