Main Street Capital Corporation bonds MAIN
Who owns Main Street Capital Corporation's debt and what their own filings say it is worth. Bond prices and yields are fund-reported marks (SEC Form N-PORT) as of Jul 2026; they lag the market by about two months. MAIN stock page.
Every bond funds hold
Each bond's latest fund-reported mark. Price per 100 of face value; yield to maturity from price, coupon and maturity; spread over the matched-maturity Treasury for US-dollar bonds.
| Bond | Coupon | Maturity | Ccy | Price | Yield | Spread | Funds | Held | As of |
|---|---|---|---|---|---|---|---|---|---|
| 56035LAJ3 | 6.5% fixed | 2027-06-04 | USD | 101.01 | 5.25% | 126 bp | 8 | $6.2M | Jul 2026 |
| 56035LAK0 | 5.4% fixed | 2028-08-15 | USD | 99.75 | 5.53% | 131 bp | 14 | $24.0M | Jul 2026 |
| 56035LAH7 | 6.95% fixed | 2029-03-01 | USD | 102.80 | 5.77% | 152 bp | 24 | $36.1M | Jul 2026 |
Spread history
Median spread of the US-dollar bonds over Treasuries, month-ends with complete filings. Fund-reported.
Price history
Median fund-marked price across the bonds, per 100 of face value.
By month
Funds file on staggered quarter-ends, so each month-end is marked by the funds that reported for it; the amount held moves with which funds filed, not only with buying and selling.
| Month-end | Bonds | Held | Median price | USD yield | USD spread | Most funds on one bond |
|---|---|---|---|---|---|---|
| Jul 2026 | 3 | $66.4M | 101.01 | 5.65% | 142 bp | 24 |
| Jun 2026 | 4 | $181.2M | 100.45 | 5.74% | 161 bp | 31 |
| May 2026 | 4 | $45.8M | 100.35 | 5.57% | 171 bp | 14 |
| Apr 2026 | 4 | $156.5M | 100.36 | 5.58% | 178 bp | 21 |
| Mar 2026 | 4 | $174.0M | 100.15 | 5.68% | 198 bp | 26 |
| Feb 2026 | 4 | $34.9M | 101.03 | 5.22% | 173 bp | 13 |
| Jan 2026 | 4 | $117.4M | 101.35 | 5.14% | 156 bp | 15 |
| Dec 2025 | 4 | $152.8M | 101.29 | 5.21% | 168 bp | 29 |
| Nov 2025 | 4 | $39.9M | 101.19 | 5.30% | 174 bp | 15 |
| Oct 2025 | 4 | $75.1M | 100.97 | 5.41% | 188 bp | 12 |
| Sep 2025 | 4 | $153.9M | 101.32 | 5.24% | 169 bp | 27 |
| Aug 2025 | 4 | $40.0M | 101.32 | 5.25% | 158 bp | 13 |
| Jul 2025 | 3 | $63.1M | 102.06 | 5.49% | 160 bp | 12 |
Who holds the debt
Fund series in their latest quarterly N-PORT report, largest first, with the change in face value against each fund's own previous report. Names as reported in the filings. 15 added, 22 cut, 13 new holders and 5 exits in the latest quarter.
| Fund series | Report | Face value | Value | Change in face value |
|---|---|---|---|---|
| Thornburg Strategic Income Fund THORNBURG INVESTMENT TRUST | 2026-06-30 | $46.9M | $47.0M | $0 |
| American Balanced Fund | 2026-06-30 | $25.0M | $25.7M | new |
| Thornburg Limited Term Income Fund THORNBURG INVESTMENT TRUST | 2026-06-30 | $21.7M | $21.7M | $0 |
| BBH Limited Duration Fund BBH Trust | 2026-07-31 | $20.8M | $21.0M | -$74.2M |
| VANGUARD SHORT-TERM CORPORATE BOND INDEX FUND VANGUARD SCOTTSDALE FUNDS | 2026-05-31 | $20.0M | $20.4M | $4.8M |
| VANGUARD TOTAL BOND MARKET INDEX FUND VANGUARD BOND INDEX FUNDS | 2026-06-30 | $13.7M | $13.9M | -$6.2M |
| VANGUARD TOTAL BOND MARKET II INDEX FUND VANGUARD BOND INDEX FUNDS | 2026-06-30 | $12.2M | $12.4M | -$5.4M |
| Payden Limited Maturity Fund PAYDEN & RYGEL INVESTMENT GROUP | 2026-07-31 | $10.1M | $10.2M | $0 |
| iShares 1-5 Year Investment Grade Corporate Bond ETF iShares Trust | 2026-05-31 | $6.3M | $6.4M | $495K |
| VANGUARD SHORT-TERM BOND INDEX FUND VANGUARD BOND INDEX FUNDS | 2026-06-30 | $6.1M | $6.2M | -$3.5M |
| BBH Income Fund BBH Trust | 2026-07-31 | $4.6M | $4.7M | $0 |
| Loomis Sayles Core Plus Bond Fund Natixis Funds Trust I | 2026-06-30 | $4.5M | $4.6M | $0 |
| VOYA INTERMEDIATE BOND FUND Voya Funds Trust | 2026-06-30 | $4.4M | $4.5M | -$346K |
| Multi-Manager Total Return Bond Strategies Fund COLUMBIA FUNDS SERIES TRUST I | 2026-05-31 | $4.0M | $4.1M | $1.4M |
| iShares iBonds Dec 2029 Term Corporate ETF iShares Trust | 2026-07-31 | $3.8M | $3.9M | $1.0M |
| State Street(R) SPDR(R) Portfolio Short Term Corporate Bond ETF SPDR SERIES TRUST | 2026-06-30 | $3.9M | $3.9M | -$6.5M |
| BlackRock Systematic Multi-Strategy Fund BlackRock Funds IV | 2026-06-30 | $3.9M | $3.9M | $0 |
| Payden Low Duration Fund PAYDEN & RYGEL INVESTMENT GROUP | 2026-07-31 | $3.8M | $3.8M | $0 |
| State Street(R) My2028 Corporate Bond ETF SSGA Active Trust | 2026-05-31 | $3.7M | $3.7M | new |
| NVIT Loomis Core Bond Fund Nationwide Variable Insurance Trust | 2026-06-30 | $3.6M | $3.6M | $0 |
| PIMCO Sector Fund Series - I PIMCO FUNDS | 2026-06-30 | $3.3M | $3.3M | $0 |
| Catalyst Insider Income Fund MUTUAL FUND SERIES TRUST | 2026-06-30 | $3.2M | $3.2M | $0 |
| PIMCO Active Bond Exchange-Traded Fund PIMCO ETF Trust | 2026-06-30 | $3.1M | $3.2M | $0 |
| State Street(R) Ultra Short Term Bond ETF SSGA Active Trust | 2026-06-30 | $3.2M | $3.2M | new |
| iShares iBonds Dec 2027 Term Corporate ETF iShares Trust | 2026-07-31 | $3.1M | $3.1M | $215K |
Largest exits in the latest quarter (fund held the bonds in its previous report, none now): Holbrook Income Fund ($9.0M), iShares iBonds 2026 Term High Yield and Income ETF ($4.7M), iShares iBonds Dec 2026 Term Corporate ETF ($3.9M), Victory Short-Term Bond Fund ($3.5M), State Street(R) SPDR(R) Portfolio Aggregate Bond ETF ($270K).
ETFs holding these bonds
From each ETF's own latest N-PORT report: the issuer's bonds as a share of the ETF's net assets. A holdings list, not a recommendation.
| ETF | Report | Bonds | Face value | Value | % of net assets |
|---|---|---|---|---|---|
| VCSH VANGUARD SHORT-TERM CORPORATE BOND INDEX FUND | 2026-05-31 | 3 | $20.0M | $20.4M | 0.04% |
| BND VANGUARD TOTAL BOND MARKET INDEX FUND | 2026-06-30 | 2 | $13.7M | $13.9M | 0.00% |
| IGSB iShares 1-5 Year Investment Grade Corporate Bond ETF | 2026-05-31 | 3 | $6.3M | $6.4M | 0.03% |
| BSV VANGUARD SHORT-TERM BOND INDEX FUND | 2026-06-30 | 2 | $6.1M | $6.2M | 0.01% |
| IBDU iShares iBonds Dec 2029 Term Corporate ETF | 2026-07-31 | 1 | $3.8M | $3.9M | 0.10% |
| SPSB State Street(R) SPDR(R) Portfolio Short Term Corporate Bond ETF | 2026-06-30 | 2 | $3.9M | $3.9M | 0.04% |
| MYCH State Street(R) My2028 Corporate Bond ETF | 2026-05-31 | 1 | $3.7M | $3.7M | 0.66% |
| BOND PIMCO Active Bond Exchange-Traded Fund | 2026-06-30 | 1 | $3.1M | $3.2M | 0.04% |
| ULST State Street(R) Ultra Short Term Bond ETF | 2026-06-30 | 1 | $3.2M | $3.2M | 0.60% |
| IBDS iShares iBonds Dec 2027 Term Corporate ETF | 2026-07-31 | 1 | $3.1M | $3.1M | 0.08% |
| SPIB State Street(R) SPDR(R) Portfolio Intermediate Term Corporate Bond ETF | 2026-06-30 | 2 | $2.8M | $2.8M | 0.02% |
| AGG iShares Core U.S. Aggregate Bond ETF | 2026-05-31 | 3 | $2.7M | $2.7M | 0.00% |
| IBDT iShares iBonds Dec 2028 Term Corporate ETF | 2026-07-31 | 1 | $2.8M | $2.7M | 0.07% |
| USIG iShares Broad USD Investment Grade Corporate Bond ETF | 2026-05-31 | 3 | $1.6M | $1.6M | 0.01% |
| CORP PIMCO Investment Grade Corporate Bond Index Exchange-Traded Fund | 2026-06-30 | 1 | $1.5M | $1.5M | 0.09% |
Default risk, three ways
Stock market: distance-to-default
Not computed: financial company (banks, insurers, BDCs and REITs carry leverage as their business, which the model misreads).
Bond market: priced-in odds
A 142 bp spread prices in about 2.4% a year of default odds (spread ÷ (1 − 40% recovery)). Fund-reported marks as of Jul 2026; the spread also pays for liquidity and risk premium, so this overstates actual defaults.
Accounts: Altman Z
Not available.
The stock side: 13F filings
What institutions report holding in MAIN's stock and options. Options are reported at the value of the underlying shares, not the premium paid; 13F lists long positions only, lags 45 days after quarter-end, and does not show whether puts hedge a stock position.
| Quarter-end | Stock holders | Stock value | Put managers | Puts (underlying value) | Call managers | Calls (underlying value) | Convertible holders |
|---|---|---|---|---|---|---|---|
| 2026-09-30 filings still arriving | 44 | $41.9M | 0 | — | 0 | — | 0 |
| 2026-06-30 | 396 | $1.01B | 8 | $27.1M | 6 | $22.4M | 0 |
| 2026-03-31 | 416 | $948.1M | 10 | $35.0M | 7 | $22.9M | 0 |
| 2025-12-31 | 423 | $992.5M | 8 | $54.8M | 8 | $21.2M | 0 |
| 2025-09-30 | 401 | $949.0M | 10 | $57.0M | 7 | $20.5M | 0 |
| 2025-06-30 | 396 | $871.7M | 10 | $57.7M | 6 | $19.2M | 0 |
Sources: fund holdings and fund-reported marks from SEC Form N-PORT (published about 60 days after each month-end); 13F filings; House and Senate periodic transaction reports and OGE Form 278-T; Treasury yields from FRED. Findings from filings, not advice. How each number is computed.