MAIN STREET CAPITAL CORP (MAIN) Institutional Shareholders
MAIN STREET CAPITAL CORP (MAIN) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $942.19M in MAIN holdings during the latest filing period.
Ubs Group Ag is currently the largest disclosed institutional shareholder of MAIN tracked by InsiderSet, reporting ownership valued at approximately $70.90M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $76.51M, representing an estimated gain of +7.91% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 36% of the total disclosed MAIN value among the investors covered in this analysis. Major shareholders include Ubs Group Ag, Morgan Stanley, Legal & General Group Plc, and several other long-term asset managers with concentrated positions in MAIN STREET CAPITAL CORP (MAIN).
This page ranks the largest institutional MAIN shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
411
Total Reported Value
$942.19M
Largest Holder
Ubs Group Ag
Largest Position
$70.90M
Insider Transactions (90d)
20
Latest Filing Quarter
Q2 2026
New Institutional Positions
56
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Ubs Group Ag | 0.01% | 1,338,812 | $70,903,484 | $76,513,106 | +$5,609,622 | +7.91% | |
| Morgan Stanley | 0.00% | 854,585 | $45,258,917 | $48,839,533 | +$3,580,616 | +7.91% | |
| Legal & General Group Plc | 0.01% | 784,021 | $41,513,912 | $44,806,800 | +$3,292,888 | +7.93% | |
| D. E. Shaw & Co., Inc. | 0.02% | 543,325 | $28,774,492 | $31,051,024 | +$2,276,532 | +7.91% | |
| Two Sigma Investments, Lp | 0.02% | 524,038 | $27,753,052 | $29,948,772 | +$2,195,720 | +7.91% | |
| Muzinich & Co., Inc. | 8.79% | 495,923 | $25,728,498 | $28,341,999 | +$2,613,501 | +10.16% | |
| Qube Research & Technologies Ltd | 0.04% | 485,799 | $25,727,915 | $27,763,413 | +$2,035,498 | +7.91% | |
| Adell Harriman & Carpenter Inc | 1.57% | 484,584 | $25,663,612 | $27,693,976 | +$2,030,364 | +7.91% | |
| Union Bancaire Privee, Ubp Sa | 0.27% | 2,942 | $24,271,801 | $168,135 | -$24,103,666 | -99.31% | |
| Invesco Ltd. | 0.00% | 432,475 | $22,903,877 | $24,715,946 | +$1,812,069 | +7.91% | |
| Blackrock, Inc. | 0.00% | 424,235 | $22,467,460 | $24,245,030 | +$1,777,570 | +7.91% | |
| Sumitomo Mitsui Trust Group, Inc. | 0.01% | 375,509 | $19,481,407 | $21,460,339 | +$1,978,932 | +10.16% | |
| Millennium Management Llc | 0.01% | 359,838 | $19,057,020 | $20,564,742 | +$1,507,722 | +7.91% | |
| Lpl Financial Llc | 0.00% | 347,928 | $18,426,245 | $19,884,085 | +$1,457,840 | +7.91% | |
| Franklin Resources Inc | 0.00% | 320,868 | $16,993,169 | $18,337,606 | +$1,344,437 | +7.91% | |
| Goldman Sachs Group Inc | 0.00% | 313,388 | $16,597,028 | $17,910,124 | +$1,313,096 | +7.91% | |
| Raymond James Financial Inc | 0.00% | 263,721 | $13,929,725 | $15,071,655 | +$1,141,930 | +8.20% | |
| Childress Capital Advisors, Llc | 2.19% | 257,733 | $13,371,188 | $14,729,441 | +$1,358,253 | +10.16% | |
| Trinity Legacy Partners, Llc | 2.42% | 217,844 | $12,099,069 | $12,449,785 | +$350,716 | +2.90% | |
| Marshall Wace, Llp | 0.01% | 205,441 | $10,880,156 | $11,740,953 | +$860,797 | +7.91% | |
| Sanders Morris Harris Llc | 6.00% | 199,559 | $10,353,133 | $11,404,797 | +$1,051,664 | +10.16% | |
| Osaic Holdings, Inc. | 0.01% | 169,695 | $8,987,450 | $9,698,069 | +$710,619 | +7.91% | |
| Private Advisor Group, Llc | 0.04% | 162,463 | $8,428,611 | $9,284,760 | +$856,149 | +10.16% | |
| Royal Bank Of Canada | 0.00% | 151,196 | $8,007,000 | $8,640,851 | +$633,851 | +7.92% | |
| Benjamin Edwards Inc | 0.07% | 145,655 | $7,556,388 | $8,324,183 | +$767,795 | +10.16% | |
| Trexquant Investment Lp | 0.05% | 142,490 | $7,546,270 | $8,143,304 | +$597,034 | +7.91% | |
| Tectonic Advisors Llc | 0.36% | 145,445 | $7,545,668 | $8,312,182 | +$766,514 | +10.16% | |
| U.S. Capital Wealth Advisors, Llc | 0.19% | 139,128 | $7,368,208 | $7,951,165 | +$582,957 | +7.91% | |
| Joel Isaacson & Co., Llc | 0.23% | 129,007 | $6,832,232 | $7,372,750 | +$540,518 | +7.91% | |
| Tctc Holdings, Llc | 0.19% | 128,991 | $6,831,363 | $7,371,836 | +$540,473 | +7.91% | |
| Envestnet Asset Management Inc | 0.00% | 127,331 | $6,743,465 | $7,276,967 | +$533,502 | +7.91% | |
| Ameriprise Financial Inc | 0.00% | 126,948 | $6,741,938 | $7,255,078 | +$513,140 | +7.61% | |
| Balyasny Asset Management L.P. | 0.01% | 120,007 | $6,355,571 | $6,858,400 | +$502,829 | +7.91% | |
| Segment Wealth Management, Llc | 0.31% | 114,748 | $5,953,118 | $6,557,848 | +$604,730 | +10.16% | |
| Hamilton Point Investment Advisors, Llc | 0.83% | 113,705 | $5,899,038 | $6,498,241 | +$599,203 | +10.16% | |
| Advisors Asset Management, Inc. | 0.10% | 111,220 | $5,890,211 | $6,356,223 | +$466,012 | +7.91% | |
| State Street Corp | 0.00% | 110,688 | $5,862,036 | $6,325,819 | +$463,783 | +7.91% | |
| Wells Fargo & Company/Mn | 0.00% | 103,723 | $5,493,160 | $5,927,769 | +$434,609 | +7.91% | |
| Integrated Wealth Concepts Llc | 0.04% | 103,138 | $5,462,209 | $5,894,337 | +$432,128 | +7.91% | |
| Hourglass Capital, Llc | 1.20% | 104,850 | $5,439,618 | $5,992,178 | +$552,560 | +10.16% | |
| Denali Advisors Llc | 0.60% | 101,485 | $5,374,624 | $5,799,868 | +$425,244 | +7.91% | |
| Meridian Wealth Management, Llc | 0.19% | 101,197 | $5,359,405 | $5,783,409 | +$424,004 | +7.91% | |
| J.W. Cole Advisors, Inc. | 0.09% | 100,593 | $5,218,782 | $5,748,890 | +$530,108 | +10.16% | |
| Bank Of America Corp | 0.00% | 97,631 | $5,170,553 | $5,579,612 | +$409,059 | +7.91% | |
| Hightower Advisors, Llc | 0.01% | 95,585 | $5,062,114 | $5,462,683 | +$400,569 | +7.91% | |
| First Trust Advisors Lp | 0.00% | 94,492 | $5,004,299 | $5,400,218 | +$395,919 | +7.91% | |
| Bnp Paribas Financial Markets | 0.00% | 92,205 | $4,883,177 | $5,269,516 | +$386,339 | +7.91% | |
| Confluence Investment Management Llc | 0.08% | 93,486 | $4,850,054 | $5,342,725 | +$492,671 | +10.16% | |
| Quantbot Technologies Lp | 0.19% | 88,742 | $4,699,776 | $5,071,605 | +$371,829 | +7.91% | |
| Albion Financial Group | 0.26% | 88,112 | $4,571,251 | $5,035,601 | +$464,350 | +10.16% |
Frequently asked questions about MAIN
Who owns the most MAIN stock?
The largest holders of MAIN are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for MAIN STREET CAPITAL CORP (MAIN).
Is MAIN widely held by superinvestors?
Many widely followed stocks like MAIN appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly MAIN is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.