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New Mountain Finance Corp NMFC

US equityMarket cap rank #3582Asset Management
$6.74 −$0.10 (-1.46%)
Pre-market · Oct 8, 8:10 am ET · After hours $6.74 0.00%
Open$6.81
Prev close$6.84
Day range$6.69 – $6.81
Volume529.5K
Market cap$636.61M
P/E (TTM)–
Dividend yield17.95%

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership29.4%-1.57 pts vs. prior quarter
Institutions holding153-2 vs. prior quarter
Insider trades (recent)34 buys / 2 sellsNet buying
Short interest3.43% of floatDays to cover 7.5 · as of 15 Sep 2026
Short-sale volume share21.6%5-day average of daily volume

Short-sale volume as % of daily volume

15%20%25%31%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: +$884.7K (11 inflow days, 9 outflow days).

Net flow by order size, last 20 sessions

+$572.0KSuper+$312.7KBig−$450.6KMid+$302.9KSmall

Super/Big orders approximate institutional-size trades; Mid/Small approximate retail-size trades. Net buy minus sell value in each bucket, summed over the window.

The five largest holders on file together own 22.8% of shares outstanding.

Largest holders

  • Steven Klinsky13.05%
  • LSV Asset Management3.18%
  • UBS Asset Management2.62%
  • Van Eck Associates Corporation2.27%
  • Invesco Capital Management LLC1.65%
  • Russell Investment Management, LLC1.46%
  • Dimension Capital Management LLC1.29%
  • Corient Private Wealth LP1.19%

By investor type

  • Mutual Fund22.13%
  • Individual/Insider15.82%
  • Hedge Fund3.35%
  • Public Company1.55%
  • Family Office/Trust1.29%
  • Private Company0.92%
  • VC/PE Fund0.15%
  • Government Pension Fund0.01%

Reported short interest has held roughly steady near 3.43% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Recent institutional activity

HolderTypePeriodShare changeNew stake
Russell Investment Management, LLC Mutual Fund 2026/Q3 +444,492 1.5%
UBS Asset Management Mutual Fund 2026/Q3 +386,273 2.6%
Van Eck Associates Corporation Mutual Fund 2026/Q3 +348,872 2.3%
Corient Private Wealth LP Mutual Fund 2026/Q3 +254,361 1.2%
Pathstone Family Office, LLC Family Office/Trust 2026/Q3 +163,582 0.9%
Flax Pond Capital, LLC Family Office/Trust 2026/Q3 +156,299 0.2%
RiverNorth Capital Management, LLC Mutual Fund 2026/Q3 +140,634 0.1%
The Goldman Sachs Group, Inc. Public Company 2026/Q3 +107,467 0.1%
Privium Fund Management (UK) Limited Hedge Fund 2026/Q3 +100,000 0.1%
Accelerate Financial Technologies Inc. Hedge Fund 2026/Q3 +94,620 0.3%
Focus Partners Wealth, LLC Mutual Fund 2026/Q3 +82,833 0.4%
Citadel Advisors LLC Hedge Fund 2026/Q3 +68,170 0.1%
Dimension Capital Management LLC Hedge Fund 2026/Q3 +66,547 1.3%
Hudson River Trading LLC Private Company 2026/Q3 +56,730 0.1%
Morgan Stanley Public Company 2026/Q3 +53,592 0.8%

Institutional buy/sell activity by reporting period, largest moves first.

Insider transactions

DateInsiderTitleTransactionSharesPriceHeld after
14 Jun 2026 John Malfettone Director Open Market Disposition -77,500 $7.89 –
9 Jun 2026 John Kline Other Acquisition +2,000 – 389,685
16 Mar 2026 Adam Weinstein Chief Administrative Officer, Executive VP & Director Open Market Acquisition +12,900 $7.61 751,756
10 Mar 2026 Steven Klinsky Chairperson Open Market Acquisition +500,000 $8.05 12,330,154
4 Mar 2026 Steven Klinsky Chairperson Open Market Acquisition +237,873 $8.10 11,830,154
3 Mar 2026 Steven Klinsky Chairperson Open Market Acquisition +437,400 $8.17 11,592,281
2 Mar 2026 David Ogens Independent Director Open Market Acquisition +12,500 $7.87 257,556
1 Mar 2026 Steven Klinsky Chairperson Open Market Acquisition +324,727 $7.79 11,154,881
1 Mar 2026 Adam Weinstein Chief Administrative Officer, Executive VP & Director Open Market Acquisition +41,707 $7.76 738,856
26 Feb 2026 Laura C. Boswerger COO, CFO & Treasurer Open Market Acquisition +12,500 $7.74 81,030
14 Jan 2026 John Malfettone Director Initial Statement of Beneficial +0 – 77,500
15 Sep 2025 Steven Klinsky Chairperson Open Market Acquisition +106,691 $9.78 10,822,582
14 Sep 2025 Adam Weinstein Chief Administrative Officer, Executive VP & Director Open Market Acquisition +49,750 $10.03 652,490
10 Aug 2025 David Ogens Independent Director Open Market Acquisition +26,000 $10.26 232,189
6 Aug 2025 Kris Corbett Chief Financial Officer Open Market Acquisition +750 $10.14 9,750
6 Mar 2025 David Ogens Independent Director Open Market Acquisition +10,000 $11.32 194,020
4 Mar 2025 David Ogens Independent Director Open Market Acquisition +10,000 $11.44 184,020
16 Dec 2024 Steven Klinsky Chairperson Open Market Acquisition +72,280 $11.28 10,662,134
15 Dec 2024 Steven Klinsky Chairperson Open Market Acquisition +100,502 $11.74 10,589,854
11 Dec 2024 Steven Klinsky Chairperson Open Market Acquisition +31,596 $11.74 5,056,495

From Form 4/Form 144 filings. Negative share counts are disposals (sales, gifts, or shares withheld for taxes); positive are acquisitions.

Short interest, by report

Report dateShares short% of floatDays to cover
15 Sep 2026 3,243,780 3.4% 7.5
31 Aug 2026 2,993,138 3.2% 9.2
14 Aug 2026 2,981,928 3.2% 4.5
31 Jul 2026 3,300,189 3.5% 6.7
15 Jul 2026 3,318,433 3.5% 5.0
30 Jun 2026 3,240,363 3.4% 3.3

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