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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 1 sale; 401 institutions reported holding it in 13F filings for Q2 2026, worth $1.18B in total; no superinvestor holds it.

13F holders, Q2 2025

Institutional positions in Main Street Capital CORP as of Jun 30, 2025. 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
405
+16 vs. Q1 2025
Shares held
19.7M
+878.7K (+4.7%) vs. Q1 2025
Total value
$1.17B
+$101.6M (+9.5%) vs. Q1 2025
New holders
51
148 more added
Sold out
35
108 more reduced

4 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q1 2025: 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 2025: 405 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 2025: $1.17B
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 2025

Shares, value and share of portfolio for each institution holding Main Street Capital CORP; share changes are against Q1 2025.

Institutions holding MAIN in Q2 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Squarepoint Ops LLC26,074$1.54M0.00%+6,828+35.5%Added
Trexquant Investment LP25,532$1.51M0.02%+25,532New
Bokf, NA25,000$1.48M0.02%00.0%Unchanged
Baird Financial Group, Inc.24,613$1.45M0.00%−731−2.9%Reduced
Widmann Financial Services, Inc.24,386$1.44M1.00%+20.0%Added
Generali Investments CEE, investicni spolecnost, a.s.22,910$1.35M0.11%+22,910New
Engineers Gate Manager LP22,381$1.32M0.02%−858−3.7%Reduced
WealthPLAN Partners, LLC22,259$1.32M0.21%+325+1.5%Added
TCG Advisory Services, LLC20,962$1.24M0.04%−2,180−9.4%Reduced
Simon Quick Advisors, LLC20,526$1.21M0.06%−354−1.7%Reduced
Arete Wealth Advisors, LLC20,367$1.20M0.09%+4,037+24.7%Added
Goldman Sachs Group Inc20,248$1.20M0.00%+9,787+93.6%Added
Mariner, LLC20,116$1.19M0.00%−4,796−19.3%Reduced
Jane Street Group, LLC19,831$1.17M0.00%+19,831New
Mackenzie Financial Corp19,303$1.14M0.00%+9,089+89.0%Added
SS&H Financial Advisors, Inc.19,200$1.13M0.38%00.0%Unchanged
Manufacturers Life Insurance Company, The18,881$1.12M0.00%−3,277−14.8%Reduced
MML Investors Services, LLC18,687$1.10M0.00%+927+5.2%Added
Cerity Partners LLC18,649$1.10M0.00%−28,035−60.1%Reduced
SMH Capital Advisors Inc18,630$1.10M2.50%−126−0.7%Reduced
Janney Montgomery Scott LLC18,417$1.09M0.00%+716+4.0%Added
Lido Advisors, LLC18,354$1.08M0.01%−2,321−11.2%Reduced
Allworth Financial LP18,138$1.07M0.01%+8,084+80.4%Added
Brasada Capital Management, LP17,000$1.04M0.18%−3,500−17.1%Reduced
Avantax Advisory Services, Inc.17,421$1.03M0.01%+1,870+12.0%Added
Callahan Advisors, LLC17,058$1.01M0.09%−38−0.2%Reduced
Ronald Blue Trust, Inc.16,959$1.00M0.01%+8,226+94.2%Added
Milestone Asset Management, LLC16,867$996.9K0.21%+5,281+45.6%Added
Concurrent Investment Advisors, LLC16,776$991.5K0.02%+1,856+12.4%Added
ProShare Advisors LLC16,672$985.3K0.00%−547−3.2%Reduced
Uncommon Cents Investing LLC16,437$971.4K0.26%+231+1.4%Added
WCG Wealth Advisors LLC16,265$961.3K0.06%+550+3.5%Added
Bay Colony Advisory Group, Inc d/b/a Bay Colony Advisors15,889$939.1K0.13%+193+1.2%Added
Venturi Wealth Management, LLC15,583$921.0K0.05%−22,238−58.8%Reduced
Independent Financial Group, LLC15,394$909.8K0.03%−2,428−13.6%Reduced
CI Private Wealth, LLC15,390$909.6K0.00%−547−3.4%Reduced
NewEdge Wealth, LLC14,084$894.8K0.01%−50.0%Reduced
Belpointe Asset Management LLC15,030$888.3K0.04%00.0%Unchanged
Fortis Capital Advisors, LLC15,030$888.3K0.16%00.0%Unchanged
Chilton Capital Management LLC14,987$885.7K0.03%00.0%Unchanged
Savvy Advisors, Inc.14,555$860.2K0.06%+2,465+20.4%Added
Sanctuary Advisors, LLC14,489$856.3K0.01%−28−0.2%Reduced
Millennium Management LLC14,469$855.1K0.00%−4,692−24.5%Reduced
PFG Investments, LLC14,092$832.9K0.05%+292+2.1%Added
AllSquare Wealth Management LLC13,975$825.9K0.46%−400−2.8%Reduced
MAI Capital Management13,694$809.3K0.01%+356+2.7%Added
Financial Security Advisor, Inc.13,390$791.4K0.18%+26+0.2%Added
Balyasny Asset Management LLC13,340$788.4K0.00%+13,340New
Mercer Global Advisors Inc13,228$781.8K0.00%−80−0.6%Reduced
Nomura Asset Management Co Ltd13,165$778.1K0.00%+2,935+28.7%Added
RMR Wealth Builders13,148$777.0K0.07%−1,113−7.8%Reduced
Atria Investments LLC12,948$765.2K0.01%+296+2.3%Added
D.B. Root & Company, LLC12,861$760.1K0.22%−481−3.6%Reduced
Brevan Howard Capital Management LP12,580$743.5K0.01%+12,580New
Mindset Wealth Management, LLC12,520$739.9K0.24%+425+3.5%Added
Westbourne Investment Advisors, Inc.12,500$738.8K0.22%+12,500New
Guggenheim Capital LLC12,492$738.3K0.01%+570+4.8%Added
Tradition Wealth Management, LLC12,458$736.3K0.06%+167+1.4%Added
Catalyst Capital Advisors LLC12,128$716.8K0.01%00.0%Unchanged
Inscription Capital, LLC12,044$711.8K0.10%+437+3.8%Added
Stifel Financial Corp11,654$688.8K0.00%−758−6.1%Reduced
Eagle Global Advisors LLC11,515$680.5K0.03%00.0%Unchanged
SG Americas Securities, LLC10,806$639.0K0.00%+10,806New
Truist Financial Corp10,792$637.8K0.00%+835+8.4%Added
The PNC Financial Services Group, Inc.10,739$634.7K0.00%−983−8.4%Reduced
Capital Performance Advisors LLP10,516$621.5K0.12%00.0%Unchanged
Nations Financial Group Inc,10,323$610.1K0.04%+803+8.4%Added
Susquehanna Portfolio Strategies, LLC10,127$598.5K0.01%+10,127New
Mutual Advisors, LLC9,019$593.7K0.01%−1,310−12.7%Reduced
Verity Asset Management, Inc.9,918$586.2K0.28%+4,968+100.4%Added
Cahill Financial Advisors Inc9,896$584.9K0.07%−2,816−22.2%Reduced
Equitable Holdings, Inc.9,878$583.8K0.00%+128+1.3%Added
Castle Rock Wealth Management, LLC8,943$578.5K0.14%+430+5.1%Added
Chelsea Counsel Co9,780$578.0K0.29%00.0%Unchanged
Whittier Trust Co9,780$577.9K0.01%00.0%Unchanged
Stratos Wealth Partners, LTD.9,718$574.4K0.01%+101+1.1%Added
BostonPremier Wealth LLC9,550$564.4K0.31%00.0%Unchanged
Empowered Funds, LLC9,431$557.4K0.01%+633+7.2%Added
Harbour Investments, Inc.9,431$557.4K0.01%−588−5.9%Reduced
JustInvest LLC9,301$549.7K0.01%−481−4.9%Reduced
Balboa Wealth Partners9,292$549.2K0.11%−100−1.1%Reduced
AlTi Global, Inc.9,150$540.8K0.01%00.0%Unchanged
Icon Wealth Advisors, LLC9,100$537.8K0.04%00.0%Unchanged
Colony Group, LLC8,932$527.9K0.00%+45+0.5%Added
Virtus Investment Advisers, Inc.8,758$517.6K0.17%−624−6.7%Reduced
Kingsview Wealth Management, LLC8,651$511.3K0.01%−1,453−14.4%Reduced
Sentinel Trust Co Lba8,648$511.0K0.06%−2,641−23.4%Reduced
Perigon Wealth Management, LLC8,612$509.0K0.01%−298−3.3%Reduced
Vertex Planning Partners, LLC8,583$507.3K0.11%00.0%Unchanged
Park Avenue Securities LLC8,470$501.0K0.00%+1,284+17.9%Added
AXA S.A.8,470$500.6K0.00%00.0%Unchanged
Bartlett & Co. Wealth Management LLC8,400$496.4K0.01%00.0%Unchanged
Group One Trading, L.P.8,362$494.2K0.02%+8,362New
Triumph Capital Management8,305$490.8K0.15%+144+1.8%Added
Innova Wealth Partners8,240$487.0K0.29%−97−1.2%Reduced
Disciplined Investors, L.L.C.8,150$481.7K0.38%+8,150New
Golden State Equity Partners7,688$454.4K0.08%00.0%Unchanged
United Advisor Group, LLC7,653$452.3K0.08%00.0%Unchanged
Captrust Financial Advisors7,605$449.5K0.00%−1,258−14.2%Reduced
Global Retirement Partners, LLC7,552$446.3K0.01%+7,552New