🕵️ New Mountain Finance Corp ($NMFC)
SEC insider & ownership activity, last 12 months · CIK 1496099 · every row links its SEC filing
Over the last 12 months insiders sold $612K against $14.4M of open-market buying. Steven B. Klinsky bought $13.0M (Sep–Mar). Steven B. Klinsky added 11.0% → 12.5%. No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
5 buyers, $14.4M (27 lots) · 1 seller, $612K (1 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Steven B. Klinsky | 16 | $13.0M | 0 | – | Mar 11, 2026 |
| Adam B. Weinstein | 4 | $921K | 0 | – | Mar 17, 2026 |
| John P. Malfettone | 0 | – | 1 | $612K | Jun 15, 2026 |
| Ogens David | 5 | $364K | 0 | – | Mar 3, 2026 |
| Boswerger Laura C. Holson | 1 | $97K | 0 | – | Feb 27, 2026 |
| Corbett Kris | 1 | $8K | 0 | – | Aug 7, 2025 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Steven B. Klinsky | 12.5% | 13D | Mar 10, 2026 | filing ↗ | |
| Steven B. Klinsky 2024 Revocable Trust (2024 Trust 1) | 5.5% | 13D | Mar 10, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| John P Malfettone | $616K | Jun 15, 2026 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| New financial obligation (2.03) | Jun 18, 2026 | filing ↗ |
| Other events (8.01) | Jun 18, 2026 | filing ↗ |
| Other events (8.01) | Jun 5, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 12, 2026 | filing ↗ |
| Earnings (2.02) | May 4, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 4, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 4, 2026 | filing ↗ |
| Officer/director changes (5.02) | Mar 19, 2026 | filing ↗ |
| Material agreement (1.01) | Mar 10, 2026 | filing ↗ |
| Acquisition or disposition (2.01) | Mar 10, 2026 | filing ↗ |
| New financial obligation (2.03) | Mar 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 10, 2026 | filing ↗ |
| Earnings (2.02) | Feb 24, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Feb 24, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 24, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 15, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 15, 2026 | filing ↗ |
| Earnings (2.02) | Nov 3, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 3, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 3, 2025 | filing ↗ |
| Material agreement (1.01) | Oct 23, 2025 | filing ↗ |
| New financial obligation (2.03) | Oct 23, 2025 | filing ↗ |
| Other events (8.01) | Oct 23, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 23, 2025 | filing ↗ |
| Earnings (2.02) | Aug 4, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 4, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 4, 2025 | filing ↗ |