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Main Street Capital CORP

MAIN
Exchange
NYSE
SEC CIK
0001396440

In the last 90 days, Main Street Capital CORP insiders filed 1 open-market purchase and 2 sales; 401 institutions reported holding it in 13F filings for Q2 2026, worth $1.18B in total; no superinvestor holds it.

13F holders, Q2 2026

Institutional positions in Main Street Capital CORP as of Jun 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
401
−19 vs. Q1 2026
Shares held
22.7M
−496.9K (−2.1%) vs. Q1 2026
Total value
$1.18B
−$53.5M (−4.4%) vs. Q1 2026
New holders
43
148 more added
Sold out
62
122 more reduced

3 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q1 2026: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting MAIN on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ2 2026: 401 institutions
Q1 2021: 230 institutionsQ2 2021: 228 institutionsQ3 2021: 236 institutionsQ4 2021: 257 institutionsQ1 2022: 256 institutionsQ2 2022: 244 institutionsQ3 2022: 248 institutionsQ4 2022: 273 institutionsQ1 2023: 273 institutionsQ2 2023: 289 institutionsQ3 2023: 292 institutionsQ4 2023: 313 institutionsQ1 2024: 326 institutionsQ2 2024: 340 institutionsQ3 2024: 354 institutionsQ4 2024: 401 institutionsQ1 2025: 393 institutionsQ2 2025: 405 institutionsQ3 2025: 408 institutionsQ4 2025: 431 institutionsQ1 2026: 423 institutionsQ2 2026: 401 institutions
Value heldQ2 2026: $1.18B
Q1 2021: $511.5MQ2 2021: $488.5MQ3 2021: $508.1MQ4 2021: $558.7MQ1 2022: $546.5MQ2 2022: $533.6MQ3 2022: $491.5MQ4 2022: $571.7MQ1 2023: $617.8MQ2 2023: $660.3MQ3 2023: $716.5MQ4 2023: $752.3MQ1 2024: $804.4MQ2 2024: $869.4MQ3 2024: $931.0MQ4 2024: $1.10BQ1 2025: $1.07BQ2 2025: $1.17BQ3 2025: $1.27BQ4 2025: $1.26BQ1 2026: $1.24BQ2 2026: $1.18B
Institutions holding MAIN and their total value by quarter
QuarterHoldersValue
Q2 2026401$1.18B
Q1 2026423$1.24B
Q4 2025431$1.26B
Q3 2025408$1.27B
Q2 2025405$1.17B
Q1 2025393$1.07B
Q4 2024401$1.10B
Q3 2024354$931.0M
Q2 2024340$869.4M
Q1 2024326$804.4M
Q4 2023313$752.3M
Q3 2023292$716.5M
Q2 2023289$660.3M
Q1 2023273$617.8M
Q4 2022273$571.7M
Q3 2022248$491.5M
Q2 2022244$533.6M
Q1 2022256$546.5M
Q4 2021257$558.7M
Q3 2021236$508.1M
Q2 2021228$488.5M
Q1 2021230$511.5M

Institutions, Q2 2026

Shares, value and share of portfolio for each institution holding Main Street Capital CORP; share changes are against Q1 2026.

Institutions holding MAIN in Q2 2026
InstitutionSharesValue% of portfolioChange in sharesAction
Danske Bank A/S4$2080.00%00.0%Unchanged
MCF Advisors LLC4$2080.00%+4New
Mountain Hill Investment Partners Corp.5$2790.00%00.0%Unchanged
FMR LLC17$8820.00%−241−93.4%Reduced
Farmers & Merchants Investments Inc19$9860.00%00.0%Unchanged
GAMMA Investing LLC19$9860.00%00.0%Unchanged
Abound Wealth Management20$1.04K0.00%00.0%Unchanged
Medallion Wealth Advisors, LLC23$1.17K0.00%+1+4.5%Added
TD Waterhouse Canada Inc.27$1.40K0.00%+27New
Davis Capital Management33$1.71K0.00%00.0%Unchanged
Covestor Ltd43$2.00K0.00%−13−23.2%Reduced
Basepoint Wealth LLC50$2.59K0.00%+50New
SJS Investment Consulting Inc.59$3.07K0.00%−5−7.8%Reduced
St Germain D J Co Inc59$3.09K0.00%00.0%Unchanged
Erste Asset Management GmbH60$3.11K0.00%+60New
Buck Wealth Strategies, LLC70$3.61K0.00%+70New
Creative Financial Designs Inc70$3.63K0.00%+70New
Financial Consulate, Inc86$4.46K0.00%00.0%Unchanged
Pin Oak Investment Advisors Inc100$5.00K0.00%+100New
Evolution Wealth Management Inc.100$5.19K0.00%00.0%Unchanged
Huntington National Bank102$5.29K0.00%00.0%Unchanged
JFS Wealth Advisors, LLC103$5.34K0.00%+103New
Acumen Wealth Advisors, LLC110$5.72K0.00%+110New
Group One Trading, L.P.115$5.97K0.00%+115New
International Assets Investment Management, LLC115$5.98K0.00%00.0%Unchanged
West Branch Capital LLC125$6.49K0.00%00.0%Unchanged
Murphy & Mullick Capital Management Corp127$6.59K0.00%00.0%Unchanged
JNBA Financial Advisors129$6.69K0.00%00.0%Unchanged
Ankerstar Wealth, LLC139$7.21K0.01%00.0%Unchanged
McGuire Capital Advisors Inc139$7.21K0.00%00.0%Unchanged
Tidemark, LLC150$7.78K0.00%00.0%Unchanged
JPL Wealth Management, LLC150$7.78K0.00%00.0%Unchanged
Founders Capital Management150$7.78K0.00%+50+50.0%Added
Caldwell Sutter Capital, Inc.165$8.56K0.00%+165New
Key Capital Management, INC181$9.39K0.00%−396−68.6%Reduced
Keating Financial Advisory Services, Inc.185$9.60K0.00%00.0%Unchanged
Wolff Wiese Magana LLC187$9.70K0.00%00.0%Unchanged
Alerus Financial NA206$10.7K0.00%00.0%Unchanged
Crewe Advisors LLC219$11.4K0.00%00.0%Unchanged
Bogart Wealth, LLC221$11.5K0.00%+2+0.9%Added
Compass Financial Management LLC243$12.6K0.00%+243New
Caitong International Asset Management Co., Ltd260$13.5K0.00%−5,471−95.5%Reduced
Webster Bank, N. A.300$15.6K0.00%00.0%Unchanged
Manchester Capital Management LLC300$15.6K0.00%00.0%Unchanged
IAG Wealth Partners, LLC300$15.6K0.00%00.0%Unchanged
Trust Co of Vermont300$15.6K0.00%+300New
Brown Brothers Harriman & Co301$15.6K0.00%−200−39.9%Reduced
Action Point Financial Planning, LLC309$16.0K0.00%+309New
Spire Wealth Management310$16.1K0.00%−24−7.2%Reduced
Kingdom Financial Group LLC.318$16.5K0.00%+6+1.9%Added
Asset Dedication, LLC325$16.9K0.00%00.0%Unchanged
Caitlin John, LLC330$17.1K0.01%+330New
Truvestments Capital LLC364$18.9K0.00%−213−36.9%Reduced
SHP Wealth Management400$20.8K0.00%−3,375−89.4%Reduced
Peterson Wealth Management400$20.8K0.01%00.0%Unchanged
Roxbury Financial LLC402$20.8K0.02%−21−5.0%Reduced
South State Corp.405$21.0K0.00%−56−12.1%Reduced
Institute for Wealth Management, LLC.425$22.0K0.00%+425New
Morgan Dempsey Capital Management LLC435$22.6K0.01%−71,124−99.4%Reduced
Ameritas Investment Partners, Inc.454$23.5K0.00%00.0%Unchanged
Federation des caisses Desjardins du Quebec470$24.4K0.00%+10+2.2%Added
Asset Planning,Inc500$25.9K0.02%00.0%Unchanged
North Star Investment Management Corp.500$25.9K0.00%+500New
Smithfield Trust Co500$26.0K0.00%00.0%Unchanged
Gilpin Wealth Management, LLC520$27.0K0.02%00.0%Unchanged
Massmutual Trust Co FSB547$28.4K0.00%+547New
Steigerwald, Gordon & Koch Inc.600$31.1K0.00%00.0%Unchanged
Winch Advisory Services, LLC606$31.5K0.01%−464−43.4%Reduced
Prestige Wealth Management Group LLC650$33.7K0.01%00.0%Unchanged
Citigroup Inc653$33.9K0.00%−5,448−89.3%Reduced
Hazlett, Burt & Watson, Inc.700$36.0K0.01%00.0%Unchanged
Financial Network Wealth Advisors LLC728$37.8K0.04%+10+1.4%Added
Capital Advisors, Ltd. LLC750$39.0K0.00%00.0%Unchanged
Tower Research Capital LLC (TRC)753$39.1K0.00%−678−47.4%Reduced
NBC Securities, Inc.799$41.5K0.00%−206−20.5%Reduced
Luminist Capital LLC868$45.0K0.05%+868New
UBS Asset Management Americas Inc871$45.2K0.00%00.0%Unchanged
Colonial Trust Advisors884$45.9K0.00%+18+2.1%Added
EverSource Wealth Advisors, LLC956$49.6K0.00%−16−1.6%Reduced
Avion Wealth1,000$51.0K0.01%00.0%Unchanged
Bryn Mawr Trust Co1,000$51.9K0.00%00.0%Unchanged
Umb Bank N A1,034$53.6K0.00%00.0%Unchanged
Sunrise Financial Services, LLC1,125$58.4K0.03%−27−2.3%Reduced
Washington Trust Advisors, Inc.1,129$58.6K0.00%00.0%Unchanged
Sankala Group LLC1,018$59.2K0.04%+9+0.9%Added
Financial Management Professionals, Inc.1,190$61.8K0.01%+5+0.4%Added
Armstrong Advisory Group, Inc1,203$62.4K0.00%00.0%Unchanged
Princeton Global Asset Management LLC1,289$66.9K0.01%00.0%Unchanged
LifeSteps Financial, Inc.1,303$67.6K0.03%+1,303New
Fifth Third Bancorp1,350$70.0K0.00%+275+25.6%Added
Purpose Unlimited Inc.1,429$73.7K0.00%+26+1.9%Added
IFP Advisors, Inc1,459$75.7K0.00%−2−0.1%Reduced
Leonteq Securities AG1,500$77.8K0.00%00.0%Unchanged
Assetmark, Inc1,568$81.3K0.00%+118+8.1%Added
CoreCap Advisors, LLC1,583$82.1K0.00%−85,352−98.2%Reduced
Bayban1,612$83.6K0.06%00.0%Unchanged
Continuum Advisory, LLC1,649$85.5K0.01%+1,649New
Signaturefd, LLC1,762$91.4K0.00%−523−22.9%Reduced
Atlantic Union Bankshares Corp1,765$91.6K0.00%00.0%Unchanged
Private Trust Co NA1,869$97.0K0.01%00.0%Unchanged