Main Street Capital Corporation
US ˙ NYSE ˙ US56035L1044

SecurityMAIN / Main Street Capital Corporation
InstitutionMorgan Stanley
Latest Disclosed Ownership854,585 shares
Latest Disclosed Value $ 45,258,917
Morgan Stanley reports 1.53% decrease in ownership of MAIN / Main Street Capital Corporation

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 854,585 shares of Main Street Capital Corporation (US:MAIN) valued at $45,258,822 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 867,861 shares of Main Street Capital Corporation. This represents a change in shares of -1.53% during the quarter. The current value of the position is $43,336,005 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F MAIN STR CAP COM 56035L104 854,585 -13,276 -1.53 45,259 -13.65 0.0027
2026-05-27 2025-12-31 13F/A-1 MAIN STR CAP COM 56035L104 867,861 -118,586 -12.02 52,410 -16.45 0.0031
2026-02-13 2025-12-31 13F MAIN STR CAP COM 56035L104 867,861 -118,586 52,410 0.0031
2026-05-27 2025-09-30 13F/A-1 MAIN STR CAP COM 56035L104 986,447 -25,633 -2.53 62,728 4.87 0.0038
2025-11-14 2025-09-30 13F MAIN STR CAP COM 56035L104 986,447 -25,633 62,728 0.0038
2025-08-15 2025-06-30 13F MAIN STR CAP COM 56035L104 1,012,080 43,594 4.50 59,814 9.19 0.0039
2025-05-15 2025-03-31 13F MAIN STR CAP COM 56035L104 968,486 -2,524 -0.26 54,778 -3.70 0.0039
2025-05-15 2024-12-31 13F/A-1 MAIN STR CAP COM 56035L104 971,010 -125,662 -11.46 56,882 3.44 0.0040
2025-02-14 2024-12-31 13F MAIN STR CAP COM 56035L104 971,010 -125,662 56,882 0.0040
2025-05-14 2024-09-30 13F/A-2 MAIN STR CAP COM 56035L104 1,096,672 137,309 14.31 54,987 13.52 0.0040
2025-02-14 2024-09-30 13F/A-1 MAIN STR CAP COM 56035L104 1,096,672 137,309 54,987 0.0040
2024-11-14 2024-09-30 13F MAIN STR CAP COM 56035L104 1,096,672 137,309 54,987 0.0040
2025-05-14 2024-06-30 13F/A-2 MAIN STR CAP COM 56035L104 959,363 144,607 17.75 48,438 25.66 0.0037
2024-10-17 2024-06-30 13F/A-1 MAIN STR CAP COM 56035L104 959,363 144,607 48,438 0.0037
2024-08-14 2024-06-30 13F MAIN STR CAP COM 56035L104 959,363 144,607 48,438 0.0037
2024-10-17 2024-03-31 13F/A-2 MAIN STR CAP COM 56035L104 814,756 43,785 5.68 38,546 15.65 0.0031
2024-08-16 2024-03-31 13F/A-1 MAIN STR CAP COM 56035L104 814,756 43,785 38,546 0.0004
2024-05-15 2024-03-31 13F MAIN STR CAP COM 56035L104 814,756 43,785 38,546 0.0031
2024-08-16 2023-12-31 13F/A-1 MAIN STR CAP COM 56035L104 770,971 -24,540 -3.08 33,329 3.12 0.0029
2024-02-13 2023-12-31 13F MAIN STR CAP COM 56035L104 770,971 -24,540 33,329 0.0029
2023-11-15 2023-09-30 13F MAIN STR CAP COM 56035L104 795,511 36,668 4.83 32,322 6.40 0.0033
2023-08-14 2023-06-30 13F MAIN STR CAP COM 56035L104 758,843 45,267 6.34 30,377 7.88 0.0030
2023-05-15 2023-03-31 13F MAIN STR CAP COM 56035L104 713,576 11,306 1.61 28,158 8.51 0.0030
2023-02-14 2022-12-31 13F MAIN STR CAP COM 56035L104 702,270 5,805 0.83 25,949 10.75 0.0029
2022-11-14 2022-09-30 13F MAIN STR CAP COM 56035L104 696,465 84,343 13.78 23,429 -0.66 0.0032
2022-10-27 2022-06-30 13F/A-1 MAIN STR CAP COM 56035L104 612,122 -11,631 -1.86 23,584 -11.33 0.0031
2022-08-15 2022-06-30 13F MAIN STR CAP COM 56035L104 612,122 -11,631 23,584 0.0006
2022-10-27 2022-03-31 13F/A-1 MAIN STR CAP COM 56035L104 623,753 62,890 11.21 26,596 5.71 0.0036
2022-05-13 2022-03-31 13F MAIN STR CAP COM 56035L104 623,753 62,890 26,596 0.0036
2022-02-14 2021-12-31 13F MAIN STR CAP COM 56035L104 560,863 46,764 9.10 25,160 19.08 0.0031
2021-11-15 2021-09-30 13F MAIN STR CAP COM 56035L104 514,099 -24,041 -4.47 21,129 -4.45 0.0028
2021-08-23 2021-06-30 13F/A-1 MAIN STR CAP COM 56035L104 538,140 106,040 24.54 22,112 30.72 0.0029
2021-08-16 2021-06-30 13F MAIN STR CAP COM 56035L104 538,140 106,040 22,112 0.0006
2021-05-17 2021-03-31 13F MAIN STR CAP COM 56035L104 432,100 -447,112 -50.85 16,916 -40.36 0.0025
2021-02-16 2020-12-31 13F MAIN STR CAP COM 56035L104 879,212 63,809 7.83 28,364 17.64 0.0044
2020-11-13 2020-09-30 13F MAIN STR CAP COM 56035L104 815,403 197,298 31.92 24,111 25.30 0.0047
2020-08-14 2020-06-30 13F MAIN STR CAP COM 56035L104 618,105 377,788 157.20 19,242 290.30 0.0043
2020-05-26 2020-03-31 13F/A-1 MAIN STR CAP COM 56035L104 240,317 -2,817 -1.16 4,930 -52.96 0.0013
2020-05-15 2020-03-31 13F MAIN STR CAP COM 56035L104 240,317 -2,817 4,930 378.7268
2020-02-14 2019-12-31 13F MAIN STREET CAPITAL COM 56035L104 243,134 6,764 2.86 10,481 2.61 0.0024
2019-11-14 2019-09-30 13F MAIN STREET CAPITAL COM 56035L104 236,370 7,011 3.06 10,214 8.29 0.0027
2019-08-14 2019-06-30 13F MAIN STREET CAPITAL COM 56035L104 229,359 17,221 8.12 9,432 19.53 0.0025
2019-05-15 2019-03-31 13F MAIN STREET CAPITAL COM 56035L104 212,138 -18,439 -8.00 7,891 1.22 0.0022
2019-02-14 2018-12-31 13F MAIN STREET CAPITAL COM 56035L104 230,577 17,716 8.32 7,796 -4.87 0.0023
2019-04-23 2018-09-30 13F/A-2 MAIN STREET CAPITAL COM 56035L104 212,861 48,252 29.31 8,195 30.81 0.0021
2018-11-20 2018-09-30 13F/A-1 MAIN STREET CAPITAL COM 56035L104 212,861 0 8,195 0.0021
2018-11-14 2018-09-30 13F MAIN STREET CAPITAL COM 56035L104 212,861 48,252 8,195
2019-04-23 2018-06-30 13F/A-1 MAIN STREET CAPITAL COM 56035L104 164,609 4,679 2.93 6,265 6.15 0.0017
2018-08-14 2018-06-30 13F MAIN STREET CAPITAL COM 56035L104 164,609 4,679 6,265
2019-04-23 2018-03-31 13F/A-1 MAIN STREET CAPITAL COM 56035L104 159,930 -49,838 -23.76 5,902 -29.19 0.0016
2018-05-14 2018-03-31 13F MAIN STREET CAPITAL COM 56035L104 159,930 -49,838 5,902
2019-04-23 2017-12-31 13F/A-1 MAIN STREET CAPITAL COM 56035L104 209,768 5,192 2.54 8,335 2.51 0.0023
2018-02-14 2017-12-31 13F MAIN STREET CAPITAL COM 56035L104 209,768 5,192 8,335
2017-11-14 2017-09-30 13F MAIN STREET CAPITAL COM 56035L104 204,576 20,177 10.94 8,131 14.63 0.0024
2017-08-11 2017-06-30 13F MAIN STREET CAPITAL COM 56035L104 184,399 -7,197 -3.76 7,093 -3.26 0.0021
2017-05-22 2017-03-31 13F/A-1 MAIN STREET CAPITAL COM 56035L104 191,596 -82,056 -29.99 7,332 -27.12 0.0023
2017-05-12 2017-03-31 13F MAIN STREET CAPITAL COM 56035L104 191,596 7,332
2017-02-22 2016-12-31 13F/A-1 MAIN STREET CAPITAL COM 56035L104 273,652 -37,567 -12.07 10,061 -5.84 0.0033
2017-02-13 2016-12-31 13F MAIN STREET CAPITAL COM 56035L104 273,652 10,061
2016-11-10 2016-09-30 13F MAIN STREET CAPITAL COM 56035L104 311,219 -78,241 -20.09 10,685 -16.48 0.0036
2016-08-12 2016-06-30 13F MAIN STREET CAPITAL COM 56035L104 389,460 -36,545 -8.58 12,793 -4.21 0.0046
2016-05-12 2016-03-31 13F MAIN STREET CAPITAL COM 56035L104 426,005 18,749 4.60 13,355 12.78 0.0051
2016-02-09 2015-12-31 13F MAIN STREET CAPITAL COM 56035L104 407,256 19,268 4.97 11,842 14.48 0.0043
2016-02-08 2015-09-30 13F/A-1 MAIN STREET CAPITAL COM 56035L104 387,988 74,181 23.64 10,344 3.30 0.0038
2015-11-09 2015-09-30 13F MAIN STREET CAPITAL COM 56035L104 387,988 10,344
2015-08-12 2015-06-30 13F MAIN STREET CAPITAL COM 56035L104 313,807 51,055 19.43 10,014 23.36 0.0035
2015-05-14 2015-03-31 13F MAIN STREET CAPITAL COM 56035L104 262,752 -13,350 -4.84 8,118 0.56 0.0030
2015-02-13 2014-12-31 13F MAIN STREET CAPITAL COM 56035L104 276,102 16,864 6.51 8,073 1.62 0.0030
2014-12-16 2014-09-30 13F/A-1 MAIN STREET CAPITAL COM 56035L104 259,238 90,304 53.46 7,944 43.11 0.0031
2014-11-14 2014-09-30 13F MAIN STREET CAPITAL COM 56035L104 259,238 7,944
2014-05-13 2014-03-31 13F MAIN STREET CAPITAL COM 56035L104 168,934 4,416 2.68 5,551 3.20 0.0023
2014-02-13 2013-12-31 13F MAIN STREET CAPITAL COM 56035L104 164,518 -39,241 -19.26 5,379 -11.81 0.0023
2013-11-13 2013-09-30 13F MAIN STREET CAPITAL HOLDING COM 56035L104 203,759 -93,540 -31.46 6,099 -25.92 0.0029
2013-08-08 2013-06-30 13F MAIN STREET CAPITAL HOLDING COM 56035L104 297,299 297,299 8,233 0.0042
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.