Main Street Capital Corporation
US ˙ NYSE ˙ US56035L1044

SecurityMAIN / Main Street Capital Corporation
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership169,695 shares
Latest Disclosed Value $ 8,987,450
Advisor Group Holdings, Inc. ownership in MAIN / Main Street Capital Corporation

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 169,695 shares of Main Street Capital Corporation (US:MAIN) valued at $8,987,047 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 170,728 shares of Main Street Capital Corporation. This represents a change in shares of -0.61% during the quarter. The current value of the position is $8,791,898 USD.

Advisor Group Holdings, Inc. has a history of taking positions in derivatives of the underlying security (MAIN) in the form of stock options.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MAIN / Main Street Capital Corporation Historical Put/Call Ratio
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 169,695 -1,033 -0.61 8,987 -12.83 0.0077
2026-02-17 2025-12-31 13F MAIN STR CAP COM 56035L104 170,728 86 0.05 10,311 -6.68 0.0151
2025-11-14 2025-09-30 13F MAIN STR CAP COM 56035L104 170,642 13,690 8.72 11,048 19.10 0.0155
2025-09-04 2025-06-30 13F/A-1 MAIN STR CAP COM 56035L104 156,952 640 0.41 9,277 4.92 0.0165
2025-08-13 2025-06-30 13F MAIN STR CAP COM 56035L104 119,924 -36,388 7,034 0.0081
2025-05-12 2025-03-31 13F MAIN STR CAP COM 56035L104 156,312 -17,784 -10.22 8,842 -13.31 0.0197
2025-06-06 2024-12-31 13F/A-1 MAIN STR CAP COM 56035L104 174,096 -3,052 -1.72 10,199 14.82 0.0229
2025-02-07 2024-12-31 13F MAIN STR CAP COM 56035L104 159,250 -17,898 8,586 0.0219
2024-11-13 2024-09-30 13F MAIN STR CAP COM 56035L104 177,148 -7,133 -3.87 8,882 -4.54 0.0200
2024-08-13 2024-06-30 13F MAIN STR CAP COM 56035L104 184,281 -40,291 -17.94 9,305 -12.42 0.0220
2024-05-10 2024-03-31 13F MAIN STR CAP COM 56035L104 224,572 -23,133 -9.34 10,625 -0.78 0.0237
2024-02-12 2023-12-31 13F MAIN STR CAP COM 56035L104 247,705 -46,082 -15.69 10,708 -10.14 0.0187
2023-11-13 2023-09-30 13F MAIN STR CAP COM 56035L104 293,787 59,877 25.60 11,917 27.27 0.0176
2023-08-21 2023-06-30 13F/A-1 MAIN STR CAP COM 56035L104 233,910 -5,788 -2.41 9,364 -1.00 0.0168
2023-08-10 2023-06-30 13F MAIN STR CAP COM 56035L104 233,910 -5,788 9,364 0.0025
2023-05-12 2023-03-31 13F MAIN STR CAP COM 56035L104 239,698 -6,021 -2.45 9,458 4.16 0.0178
2023-02-10 2022-12-31 13F MAIN STR CAP COM 56035L104 245,719 21,090 9.39 9,081 20.14 0.0184
2022-11-14 2022-09-30 13F MAIN STR CAP COM 56035L104 224,629 -7,842 -3.37 7,558 -15.67 0.0173
2022-08-10 2022-06-30 13F MAIN STR CAP COM 56035L104 232,471 20,870 9.86 8,962 1.55 0.0198
2022-05-04 2022-03-31 13F MAIN STR CAP COM 56035L104 211,601 -1,698 -0.80 8,825 -7.75 0.0171
2022-02-03 2021-12-31 13F MAIN STR CAP COM 56035L104 213,299 10,742 5.30 9,566 14.88 0.0181
2021-11-05 2021-09-30 13F MAIN STR CAP COM 56035L104 202,557 17,292 9.33 8,327 9.36 0.0174
2021-08-02 2021-06-30 13F MAIN STR CAP COM 56035L104 185,265 -9,769 -5.01 7,614 -0.33 0.0165
2021-05-13 2021-03-31 13F MAIN STR CAP COM 56035L104 195,034 6,307 3.34 7,639 25.44 0.0184
2021-02-10 2020-12-31 13F MAIN STR CAP COM 56035L104 188,727 -8,435 -4.28 6,090 4.39 0.0163
2020-11-12 2020-09-30 13F MAIN STR CAP COM 56035L104 197,162 -14,766 -6.97 5,834 -11.59 0.0175
2020-08-14 2020-06-30 13F MAIN STR CAP COM 56035L104 211,928 -132,608 -38.49 6,599 39.16 0.0221
2020-05-18 2020-03-31 13F MAIN STR CAP COM 56035L104 344,536 344,536 4,742 0.0194
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2020-11-12 2020-09-30 13F MAIN STR CAP CORP PUT COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2020-08-14 2020-06-30 13F MAIN STR CAP CORP PUT COM Put 4 0.00 5 -44.44 n/a n/a n/a
2020-05-18 2020-03-31 13F MAIN STR CAP CORP PUT COM Put 4 9 n/a n/a n/a
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.