Main Street Capital CORP

MAIN

Exchange: NYSE
SEC CIK: 0001396440

SEC filings (opens in a new tab)

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, Q3 2026

Institutional positions in Main Street Capital CORP as of Sep 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

Q3 2026 data is still coming in (13F filing deadline: Nov 16, 2026), so these numbers are incomplete.

Institutional holders: 5; +2 vs. Q2 2026
Shares held: 97.7K; +3.23K (+3.4%) vs. Q2 2026
Total value: $5.38M; +$476.7K (+9.7%) vs. Q2 2026
New holders: 2; 1 more added
Sold out: 0; 1 more reduced

398 institutions that held it in Q2 2026 haven't filed for Q3 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q2 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 holders

Value held

Institutions holding MAIN and their total value by quarter
Quarter	Holders	Value
Q2 2026	401	$1.18B
Q1 2026	423	$1.24B
Q4 2025	431	$1.26B
Q3 2025	408	$1.27B
Q2 2025	405	$1.17B
Q1 2025	393	$1.07B
Q4 2024	401	$1.10B
Q3 2024	354	$931.0M
Q2 2024	340	$869.4M
Q1 2024	326	$804.4M
Q4 2023	313	$752.3M
Q3 2023	292	$716.5M
Q2 2023	289	$660.3M
Q1 2023	273	$617.8M
Q4 2022	273	$571.7M
Q3 2022	248	$491.5M
Q2 2022	244	$533.6M
Q1 2022	256	$546.5M
Q4 2021	257	$558.7M
Q3 2021	236	$508.1M
Q2 2021	228	$488.5M
Q1 2021	230	$511.5M

Institutions, Q3 2026

Shares, value and share of portfolio for each institution holding Main Street Capital CORP; share changes are against Q2 2026.

Institutions holding MAIN in Q3 2026
Institution	Shares	Value	% of portfolio	Change in shares	Action
Confluence Investment Management LLC	96,050	$5.29M	0.09%	+2,564+2.7%	Added
CX Institutional	1,186	$65.0K	0.00%	+1,186	New
Roxbury Financial LLC	402	$22.1K	0.02%	00.0%	Unchanged
Versant Capital Management, Inc	18	$1.01K	0.00%	+18	New
Massmutual Trust Co FSB	6	$330	0.00%	−541−98.9%	Reduced
Price T Rowe Associates Inc	–	–	–	–	Not filed
Van Eck Associates Corp	–	–	–	–	Not filed
UBS Group AG	–	–	–	–	Not filed
Legal & General Group Plc	–	–	–	–	Not filed
Morgan Stanley	–	–	–	–	Not filed
Qube Research & Technologies Ltd	–	–	–	–	Not filed
Invesco Ltd.	–	–	–	–	Not filed
Adell Harriman & Carpenter Inc	–	–	–	–	Not filed
Muzinich & Co., Inc.	–	–	–	–	Not filed
BlackRock, Inc.	–	–	–	–	Not filed
Sumitomo Mitsui Trust Holdings, Inc.	–	–	–	–	Not filed
D. E. Shaw & Co., Inc.	–	–	–	–	Not filed
LPL Financial LLC	–	–	–	–	Not filed
Franklin Resources Inc	–	–	–	–	Not filed
Goldman Sachs Group Inc	–	–	–	–	Not filed
Public Employees Retirement Association of Colorado	–	–	–	–	Not filed
Childress Capital Advisors, LLC	–	–	–	–	Not filed
Raymond James Financial Inc	–	–	–	–	Not filed
Trinity Legacy Partners, LLC	–	–	–	–	Not filed
Sanders Morris Harris LLC	–	–	–	–	Not filed
Royal Bank of Canada	–	–	–	–	Not filed
Bridgelight Financial Advisors, Inc.	–	–	–	–	Not filed
Private Advisor Group, LLC	–	–	–	–	Not filed
Advisor Group Holdings, Inc.	–	–	–	–	Not filed
Cambridge Investment Research Advisors, Inc.	–	–	–	–	Not filed
SRS Capital Advisors, Inc.	–	–	–	–	Not filed
Benjamin Edwards Inc	–	–	–	–	Not filed
Tectonic Advisors LLC	–	–	–	–	Not filed
JPMorgan Chase & Co	–	–	–	–	Not filed
Millennium Management LLC	–	–	–	–	Not filed
Wells Fargo & Company	–	–	–	–	Not filed
Balyasny Asset Management LLC	–	–	–	–	Not filed
TCTC Holdings, LLC	–	–	–	–	Not filed
State Street Corp	–	–	–	–	Not filed
Ameriprise Financial Inc	–	–	–	–	Not filed
Joel Isaacson & Co., LLC	–	–	–	–	Not filed
Hourglass Capital, LLC	–	–	–	–	Not filed
Bank of America Corp	–	–	–	–	Not filed
Segment Wealth Management, LLC	–	–	–	–	Not filed
Hamilton Point Investment Advisors, LLC	–	–	–	–	Not filed
Great West Life Assurance Co	–	–	–	–	Not filed
Tudor Investment Corp Et Al	–	–	–	–	Not filed
Beacon Pointe Advisors, LLC	–	–	–	–	Not filed
Meridian Wealth Management, LLC	–	–	–	–	Not filed
Jane Street Group, LLC	–	–	–	–	Not filed
Naviter Wealth, LLC	–	–	–	–	Not filed
J.W. Cole Advisors, Inc.	–	–	–	–	Not filed
BNP Paribas Arbitrage, SA	–	–	–	–	Not filed
Cetera Investment Advisers	–	–	–	–	Not filed
Denali Advisors LLC	–	–	–	–	Not filed
HighTower Advisors, LLC	–	–	–	–	Not filed
Integrated Wealth Concepts LLC	–	–	–	–	Not filed
First Trust Advisors LP	–	–	–	–	Not filed
Albion Financial Group	–	–	–	–	Not filed
Trexquant Investment LP	–	–	–	–	Not filed
Advisors Asset Management, Inc.	–	–	–	–	Not filed
Texas Yale Capital Corp.	–	–	–	–	Not filed
Creative Planning	–	–	–	–	Not filed
Ilex Capital Partners (UK) LLP	–	–	–	–	Not filed
Baker Avenue Asset Management, LP	–	–	–	–	Not filed
Pembroke Management, LTD	–	–	–	–	Not filed
Kestra Advisory Services, LLC	–	–	–	–	Not filed
IHT Wealth Management, LLC	–	–	–	–	Not filed
Larson Financial Group LLC	–	–	–	–	Not filed
Commonwealth Equity Services, LLC	–	–	–	–	Not filed
Sound Income Strategies, LLC	–	–	–	–	Not filed
Fund Advisors of America Inc	–	–	–	–	Not filed
Midwest Professional Planners, LTD.	–	–	–	–	Not filed
HRT Financial LP	–	–	–	–	Not filed
Rockefeller Capital Management L.P.	–	–	–	–	Not filed
FJ Capital Management LLC	–	–	–	–	Not filed
Mariner, LLC	–	–	–	–	Not filed
M&T Bank Corp	–	–	–	–	Not filed
Taylor Frigon Capital Management LLC	–	–	–	–	Not filed
Envestnet Asset Management Inc	–	–	–	–	Not filed
Russell Investments Group, Ltd.	–	–	–	–	Not filed
Concurrent Investment Advisors, LLC	–	–	–	–	Not filed
Prospera Financial Services Inc	–	–	–	–	Not filed
Focus Financial Network, Inc.	–	–	–	–	Not filed
Bank of New York Mellon Corp	–	–	–	–	Not filed
Susquehanna International Group, LLP	–	–	–	–	Not filed
Capital Investment Advisors, LLC	–	–	–	–	Not filed
GWM Advisors LLC	–	–	–	–	Not filed
Barclays PLC	–	–	–	–	Not filed
First Financial Bankshares Inc	–	–	–	–	Not filed
King Luther Capital Management Corp	–	–	–	–	Not filed
ExodusPoint Capital Management, LP	–	–	–	–	Not filed
Blair William & Co	–	–	–	–	Not filed
Clear Trail Advisors, LLC	–	–	–	–	Not filed
Squarepoint Ops LLC	–	–	–	–	Not filed
Sharpepoint LLC	–	–	–	–	Not filed
Advisory Services Network, LLC	–	–	–	–	Not filed
LGT Fund Management Co Ltd.	–	–	–	–	Not filed
Lido Advisors, LLC	–	–	–	–	Not filed
Clarity Financial LLC	–	–	–	–	Not filed