Main Street Capital Corporation
US ˙ NYSE ˙ US56035L1044

SecurityMAIN / Main Street Capital Corporation
InstitutionNatixis
Latest Disclosed Ownership19,425 shares
Latest Disclosed Value $ 1,028,748
Natixis ownership in MAIN / Main Street Capital Corporation

On May 14, 2026 - Natixis filed a 13F-HR form disclosing ownership of 19,425 shares of Main Street Capital Corporation (US:MAIN) valued at $1,028,748 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 19,425 shares of Main Street Capital Corporation. This represents a change in shares of 0.00% during the quarter. The current value of the position is $985,042 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-14 2026-03-31 13F MAIN STR CAP COM 56035L104 19,425 0 0.00 1,029 -12.36 0.0033
2026-02-13 2025-12-31 13F MAIN STR CAP COM 56035L104 19,425 -17,091 -46.80 1,173 -49.48 0.0042
2025-11-14 2025-09-30 13F MAIN STR CAP COM 56035L104 36,516 0 0.00 2,322 7.60 0.0108
2025-08-13 2025-06-30 13F MAIN STR CAP COM 56035L104 36,516 7,501 25.85 2,158 32.88 0.0096
2025-07-18 2025-03-31 13F/A-1 MAIN STR CAP COM 56035L104 29,015 11,095 61.91 1,625 54.81 0.0088
2025-05-14 2025-03-31 13F MAIN STR CAP COM 56035L104 29,015 11,095 1,625 0.0089
2025-02-13 2024-12-31 13F MAIN STR CAP COM 56035L104 17,920 -12,979 -42.00 1,050 -32.28 0.0064
2024-11-13 2024-09-30 13F MAIN STR CAP COM 56035L104 30,899 6,021 24.20 1,549 23.33 0.0087
2024-08-13 2024-06-30 13F MAIN STR CAP COM 56035L104 24,878 0 0.00 1,256 6.80 0.0072
2024-05-13 2024-03-31 13F MAIN STR CAP COM 56035L104 24,878 5,350 27.40 1,177 39.34 0.0061
2024-02-13 2023-12-31 13F MAIN STR CAP COM 56035L104 19,528 2,750 16.39 844 23.94 0.0061
2023-11-14 2023-09-30 13F MAIN STR CAP COM 56035L104 16,778 1,999 13.53 682 15.23 0.0052
2023-08-11 2023-06-30 13F MAIN STR CAP COM 56035L104 14,779 -225 -1.50 592 -0.17 0.0048
2023-05-12 2023-03-31 13F MAIN STR CAP COM 56035L104 15,004 -39 -0.26 592 6.67 0.0053
2023-02-24 2022-12-31 13F/A-1 MAIN STR CAP COM 56035L104 15,043 0 0.00 556 8.82 0.0031
2023-02-13 2022-12-31 13F Main Street Capital COM 56035L104 15,043 0 558 0.0000
2022-11-14 2022-09-30 13F Main Street Capital COM 56035L104 15,043 501 3.45 510 -7.94 0.0024
2022-08-12 2022-06-30 13F Main Street Capital COM 56035L104 14,542 14,542 554 0.0020
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.