$MAIN

$53.33 -$0.18 (0.34%) Live

$MAIN Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 93.5M shares outstanding

Who owns MAIN?

By type of holder

Institutions 100.0% Insiders 0.0% Everyone else 0.0%

Concentration Top 10 holders own 295.0%

Capital World Investors 59.3% · BlackRock, Inc. 50.1%

Institutional ownership

100.0%

0 pts vs last qtr

Institutional holders

1,815

-16 vs last qtr

Net shares bought

−6.4M

by institutions in Q2 2026

New / sold out

165 / 181

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Capital World Investors +3.6M
Aqr Capital Management LLC +2.7M

Biggest sellers in Q2 2026

Capital Research Global Investors −4.5M
Harris Associates L P −3.9M

Who is planning to sell?

Notices of proposed sale, last 12 months

$2.39M

2 notices from 2 people

Shares covered

41.8K

0.04% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Jesse E. Morris Officer $2.04M
Jason B. Beauvais Officer $352K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2020–FY2025

+36.0%

+6.34% a year

Each share's claim on the business

−26.5%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $92.1M

over 6 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years79% 3–5 years14% 1–3 years4% Under 1 year3%

Quarterly turnover

6.9%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting MAIN on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
CW Capital World Investors	55.5M	59.30%	+3.6M (+6.9%)	2022	0.9%
Shares held by quarter Peak holding55.5M (Q2'26) Change over 8 quarters+11.8M Share of the company59.300% Capital World Investors's full portfolio →
B BlackRock, Inc.	46.8M	50.10%	+1.3M (+2.9%)	≤2021	0.1%
Shares held by quarter Peak holding46.8M (Q2'26) Change over 8 quarters+5.2M Share of the company50.100% BlackRock, Inc.'s full portfolio →

Capital World Investors

55.5M

% of company

59.30%

Change vs last qtr

+3.6M (+6.9%)

Held since

2022

BlackRock, Inc.

46.8M

% of company

50.10%

Change vs last qtr

+1.3M (+2.9%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Main Street Capital Corp, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting MAIN on Form N-PORT; together they hold 293.8% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
IF Income Fund of America Income Fund of America	$2.74B	18.4M	19.69%	1.85%	July 31, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$2.19B	16.9M	18.08%	0.10%	June 30, 2026

Income Fund of America

Position value

$2.74B

% of company

19.69%

% of the fund

1.85%

As of

July 31, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$2.19B

% of company

18.08%

% of the fund

0.10%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Main Street Capital Corp and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
FV Foster Vincent D Insider	2.4M	2.52%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company2.520% Foster Vincent D's insider activity →
HD Hyzak Dwayne L. Insider	509.6K	0.54%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.540% Hyzak Dwayne L.'s insider activity →

Foster Vincent D

Insider

2.4M

% of company

2.52%

Change vs last qtr

—

Held since

—

Hyzak Dwayne L.

Insider

509.6K

% of company

0.54%

Change vs last qtr

—

Held since

—

11 more holders behind a free account

See every insider and 5%+ holder of Main Street Capital Corp.

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