Who owns Main Street Capital Corporation?
Institutional ownership of MAIN from SEC Form 13F filings across 273 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
273
13F holders
$722.9M
value, 2026 filers
19.4%
of shares outstanding (18.0M sh)
30
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of MAIN's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | PRICE T ROWE ASSOCIATES INC /MD/ | 3.3M | $173,410 | 0.0% | 3.6% | +23.4% |
| 2 | VAN ECK ASSOCIATES CORP | 1.9M | $97.8M | 0.1% | 2% | -10.6% |
| 3 | UBS Group AG | 1.4M | $72.0M | 0.0% | 1.5% | +3.7% |
| 4 | Legal & General Group Plc | 835,057 | $43.3M | 0.0% | 0.9% | +6.5% |
| 5 | MORGAN STANLEY | 786,284 | $40.8M | 0.0% | 0.8% | -8.0% |
| 6 | Qube Research & Technologies Ltd | 654,166 | $33.9M | 0.0% | 0.7% | +34.7% |
| 7 | Invesco Ltd. | 553,967 | $28.7M | 0.0% | 0.6% | +28.1% |
| 8 | BlackRock, Inc. | 403,623 | $20.9M | 0.0% | 0.4% | -4.9% |
| 9 | Sumitomo Mitsui Trust Group, Inc. | 375,509 | $19.5M | 0.0% | 0.4% | +1.3% |
| 10 | D. E. Shaw & Co., Inc. | 375,318 | $19.5M | 0.0% | 0.4% | -30.9% |
| 11 | LPL Financial LLC | 347,600 | $18.0M | 0.0% | 0.4% | -0.1% |
| 12 | FRANKLIN RESOURCES INC | 342,763 | $17.8M | 0.0% | 0.4% | +6.8% |
| 13 | GOLDMAN SACHS GROUP INC | 332,291 | $17.2M | 0.0% | 0.4% | +6.0% |
| 14 | Cambridge Investment Research Advisors, Inc. | 307,898 | $15,974 | 0.0% | 0.3% | +112.4% |
| 15 | PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO | 281,397 | $14,599 | 0.1% | 0.3% | 0.0% |
| 16 | RAYMOND JAMES FINANCIAL INC | 238,617 | $12.4M | 0.0% | 0.3% | -9.5% |
| 17 | ROYAL BANK OF CANADA | 174,795 | $9.1M | 0.0% | 0.2% | +15.6% |
| 18 | OSAIC HOLDINGS, INC. | 162,228 | $8.4M | 0.0% | 0.2% | -4.4% |
| 19 | Arax Advisory PartnersNEW | 151,274 | $7.8M | 0.1% | 0.2% | new |
| 20 | BENJAMIN EDWARDS INC | 145,655 | $7.6M | 0.1% | 0.2% | -5.2% |
| 21 | JPMORGAN CHASE & CO | 141,880 | $7.3M | 0.0% | 0.2% | -15.5% |
| 22 | MILLENNIUM MANAGEMENT LLC | 134,503 | $7.0M | 0.0% | 0.1% | -62.6% |
| 23 | WELLS FARGO & COMPANY/MN | 133,473 | $6.9M | 0.0% | 0.1% | +28.7% |
| 24 | Balyasny Asset Management L.P. | 133,125 | $6.9M | 0.0% | 0.1% | +10.9% |
| 25 | AMERIPRISE FINANCIAL INC | 129,241 | $6.7M | 0.0% | 0.1% | +1.8% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.