New Mountain Finance Corporation Insider Trading

NMFC

Last 12 months

Insiders bought $12.6M and sold 611K on the open market.

None of the selling was scheduled in advance under a 10b5-1 plan. Director John P Malfettone sold 611K on Jun 15, 100% of their stake, outside a plan.

Net open-market

+$12M

8 buys · 1 sale

Under a 10b5-1 plan

of the value sold

Insiders who bought / sold

4 / 1

executives and directors

Last open-market buy

Mar 2026

Mar 17, 2026

Get an email when NMFC's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Jun 15	John P Malfettone Director	SoldNo plan	77,500	$7.89	611K	100%	Form 4
Mar 17	Adam B. Weinstein EVP, CAO and Director	Bought	12,900	$7.61	98K	1.7%	Form 4
Mar 10 – 11	Steven B Klinsky Director	Bought 4 parts	500,000	$8.05 average	$4.03M	8.6%	Form 4
Mar 5	Steven B Klinsky Director	Bought 2 parts	237,873	$8.10 average	$1.93M	4.1%	Form 4
Mar 3 – 4	Steven B Klinsky Director	Bought 4 parts	437,400	$8.04 average	$3.52M	8.1%	Form 4
Mar 3	David Ogens Director	Bought 2 parts	12,500	$7.87 average	98K	5.1%	Form 4
Feb 27 – Mar 2	Steven B Klinsky Director	Bought 4 parts	324,727	$7.75 average	$2.52M	6.2%	Form 4
Feb 27 – Mar 2	Adam B. Weinstein EVP, CAO and Director	Bought 2 parts	41,707	$7.76 average	324K	6.0%	Form 4
Feb 27	Laura C. Holson Boswerger COO	Bought	12,500	$7.74	97K	18%	Form 4
Sep 16, 2025	Steven B Klinsky Director	Bought 2 parts	106,691	$9.78 average	$1.04M	2.0%	Form 4
Sep 15, 2025	Adam B. Weinstein EVP, CAO and Director	Bought	49,750	$10.03	499K	8.3%	Form 4
Aug 11, 2025	David Ogens Director	Bought 3 parts	26,000	$10.23 average	266K	12%	Form 4
Aug 7, 2025	Kris Corbett CFO and Treasurer	Bought	750	$10.14	8K	8.3%	Form 4
Mar 6, 2025 – Mar 7, 2025	David Ogens Director	Bought 2 parts	10,000	$11.31 average	113K	5.4%	Form 4
Mar 4, 2025 – Mar 5, 2025	David Ogens Director	Bought 2 parts	10,000	$11.38 average	114K	5.7%	Form 4
Dec 17, 2024	Steven B Klinsky Director	Bought 2 parts	72,280	$11.28 average	815K	0.8%	Form 4
Dec 13, 2024 – Dec 16, 2024	Steven B Klinsky Director	Bought 4 parts	100,502	$11.74 average	$1.18M	1.2%	Form 4
Dec 11, 2024 – Dec 12, 2024	Steven B Klinsky Director	Bought 4 parts	31,597	$11.74 average	371K	0.4%	Form 4
Dec 5, 2024 – Dec 6, 2024	Steven B Klinsky Director	Bought 4 parts	34,018	$11.74 average	399K	0.4%	Form 4
Dec 3, 2024	Steven B Klinsky Director	Bought 2 parts	6,200	$11.75 average	73K	<0.1%	Form 4
Nov 26, 2024	Steven B Klinsky Director	Bought 2 parts	2,400	$11.74 average	28K	<0.1%	Form 4
Nov 22, 2024	Steven B Klinsky Director	Bought 2 parts	36,721	$11.71 average	430K	0.4%	Form 4
Nov 20, 2024 – Nov 21, 2024	Steven B Klinsky Director	Bought 4 parts	89,044	$11.56 average	$1.03M	1.1%	Form 4
Nov 18, 2024 – Nov 19, 2024	Steven B Klinsky Director	Bought 4 parts	100,272	$11.58 average	$1.16M	1.2%	Form 4
Nov 14, 2024 – Nov 15, 2024	Steven B Klinsky Director	Bought 4 parts	97,008	$11.56 average	$1.12M	1.2%	Form 4
Nov 12, 2024 – Nov 13, 2024	Steven B Klinsky Director	Bought 4 parts	152,353	$11.53 average	$1.76M	1.9%	Form 4
Nov 8, 2024 – Nov 11, 2024	Steven B Klinsky Director	Bought 4 parts	191,636	$11.30 average	$2.17M	2.4%	Form 4
Nov 6, 2024 – Nov 7, 2024	Steven B Klinsky Director	Bought 4 parts	210,469	$10.93 average	$2.3M	2.7%	Form 4
Nov 6, 2024	John Kline CEO, President, and Director	Bought 6 parts	41,550	$10.92 average	454K	13%	Form 4

Jun 15No plan
John P Malfettone
Director · sold 77,500 at $7.89
611K
100% of stake
Mar 17
Adam B. Weinstein
EVP, CAO and Director · bought 12,900 at $7.61
98K
1.7% of stake
Mar 10 – 11
Steven B Klinsky
Director · bought 500,000 at avg $8.05
$4.03M
8.6% of stake
Mar 5
Steven B Klinsky
Director · bought 237,873 at avg $8.10
$1.93M
4.1% of stake
Mar 3 – 4
Steven B Klinsky
Director · bought 437,400 at avg $8.04
$3.52M
8.1% of stake
Mar 3
David Ogens
Director · bought 12,500 at avg $7.87
98K
5.1% of stake
Feb 27 – Mar 2
Steven B Klinsky
Director · bought 324,727 at avg $7.75
$2.52M
6.2% of stake
Feb 27 – Mar 2
Adam B. Weinstein
EVP, CAO and Director · bought 41,707 at avg $7.76
324K
6.0% of stake
Feb 27
Laura C. Holson Boswerger
COO · bought 12,500 at $7.74
97K
18% of stake
Sep 16, 2025
Steven B Klinsky
Director · bought 106,691 at avg $9.78
$1.04M
2.0% of stake
Sep 15, 2025
Adam B. Weinstein
EVP, CAO and Director · bought 49,750 at $10.03
499K
8.3% of stake
Aug 11, 2025
David Ogens
Director · bought 26,000 at avg $10.23
266K
12% of stake
Aug 7, 2025
Kris Corbett
CFO and Treasurer · bought 750 at $10.14
8K
8.3% of stake
Mar 6, 2025 – Mar 7, 2025
David Ogens
Director · bought 10,000 at avg $11.31
113K
5.4% of stake
Mar 4, 2025 – Mar 5, 2025
David Ogens
Director · bought 10,000 at avg $11.38
114K
5.7% of stake
Dec 17, 2024
Steven B Klinsky
Director · bought 72,280 at avg $11.28
815K
0.8% of stake
Dec 13, 2024 – Dec 16, 2024
Steven B Klinsky
Director · bought 100,502 at avg $11.74
$1.18M
1.2% of stake
Dec 11, 2024 – Dec 12, 2024
Steven B Klinsky
Director · bought 31,597 at avg $11.74
371K
0.4% of stake
Dec 5, 2024 – Dec 6, 2024
Steven B Klinsky
Director · bought 34,018 at avg $11.74
399K
0.4% of stake
Dec 3, 2024
Steven B Klinsky
Director · bought 6,200 at avg $11.75
73K
<0.1% of stake
Nov 26, 2024
Steven B Klinsky
Director · bought 2,400 at avg $11.74
28K
<0.1% of stake
Nov 22, 2024
Steven B Klinsky
Director · bought 36,721 at avg $11.71
430K
0.4% of stake
Nov 20, 2024 – Nov 21, 2024
Steven B Klinsky
Director · bought 89,044 at avg $11.56
$1.03M
1.1% of stake
Nov 18, 2024 – Nov 19, 2024
Steven B Klinsky
Director · bought 100,272 at avg $11.58
$1.16M
1.2% of stake
Nov 14, 2024 – Nov 15, 2024
Steven B Klinsky
Director · bought 97,008 at avg $11.56
$1.12M
1.2% of stake
Nov 12, 2024 – Nov 13, 2024
Steven B Klinsky
Director · bought 152,353 at avg $11.53
$1.76M
1.9% of stake
Nov 8, 2024 – Nov 11, 2024
Steven B Klinsky
Director · bought 191,636 at avg $11.30
$2.17M
2.4% of stake
Nov 6, 2024 – Nov 7, 2024
Steven B Klinsky
Director · bought 210,469 at avg $10.93
$2.3M
2.7% of stake
Nov 6, 2024
John Kline
CEO, President, and Director · bought 41,550 at avg $10.92
454K
13% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch NMFC, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

Held by ETFs

NMFC is in 9 US ETFs. The largest of them, with NMFC's weight in each:

Spot a number that looks wrong? Check it in NMFC's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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