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NMFC New Mountain Finance Corp Insider Trading

Latest: EVP, CAO and Director Bought $98K of Shares · Mar 2026
32 filings analyzed · Latest 2026-03-18
Insider buys
32
Insider sells
0
Unique insiders
6
Direction
Net buying
March 2026
2026-03-18
low
Weinstein Adam B. Buy
EVP, CAO and Director
12,900 shares
$98,156
@ $7.61
Significance 4/10

EVP Adam Weinstein buys 12,900 NMFC shares at $7.61; stock down -29.2% from 52-week high

Adam Weinstein, EVP, CAO and Director, purchased 12,900 shares at $7.61 on 2026-03-17, a modest increase of +1.7% to his post-transaction holdings of 751.8K shares. The purchase occurred as the stock trades at $7.90, down -29.2% from its 52-week high of $11.16 and off -13.4% over the past 90 days. Weinstein has made four consecutive open-market purchases at NMFC in a concentrated window (2026-03-17, 2026-03-02, 2026-02-27, and 2025-09-15), with two of those purchases yet to show measurable outcomes. At his cross-ticker level, Weinstein's prior buy trades show a 50.00% 90-day win rate with an average 90d return of +2.3%; at NMFC specifically, his prior measurable trade (2025-09-15 buy) returned -3.2% over 90 days. The stock currently trades with a P/E of 49.38 on net income of $12.2M and a market cap of $796.4M, suggesting elevated valuation relative to earnings.

2026-03-12
high
KLINSKY STEVEN B Buy
500,000 shares
$4,025,000
@ $8.05
Significance 6/10

Director KLINSKY STEVEN B buys 500,000 shares for $4,025,000.00 at $8.05; holds 5,370,858 shares post-trade; stock down 30.4% from 52-week high.

Director KLINSKY STEVEN B made 4 separate purchases totaling 500,000 shares for $4,025,000.00 on 2026-03-10 and 2026-03-11, raising his holdings by 10.3% to 5,370,858 shares. The transactions occurred at $8.05 per share while the stock trades at $7.92 (current) and is down 30.4% from its 52-week high of $11.38. His cross-ticker track record shows 16 prior buys with 0.00% 90-day win rate and an average 90-day return of -3.3%, indicating a pattern of poorly-timed purchases. Concurrent cluster activity shows 3 other insiders also bought within the past 14 days at NMFC, though his same-ticker history at NMFC (5 prior recent buys) is not yet measurable for 90-day outcomes.

2026-03-06
medium
KLINSKY STEVEN B Buy
237,873 shares
$1,926,771
@ $8.10
Significance 4/10

Director Klinsky purchases 237,873 shares at $8.10 across 2 transactions; stock down 31.3% from 52-week high.

Steven B. Klinsky, a Director at New Mountain Finance Corp, executed 2 separate purchases totaling 237,873 shares for $1,926,771.30 at $8.10 per share on 2026-03-05, increasing his holdings from 4,799,651 to 5,037,524 shares. The timing is notable: NMFC shares are trading at $7.98, down 31.3% from the 52-week high of $11.62 and down 18.2% over the past 90 days. However, Klinsky's cross-ticker track record shows 16 prior buys with a 0.00% 90-day win rate and average 90-day returns of -4.1%, providing little confidence in his buy-timing accuracy. A cluster pattern is present with 3 other insiders also purchasing within the past 14 days, though this does not independently validate the investment thesis. The P/E of 49.88 on net income of $12,189,000.00 reflects a stock trading at elevated multiples despite recent price weakness, warranting scrutiny of whether this purchase reflects fundamental confidence or opportunistic accumulation in a depressed valuation environment.

2026-03-05
medium
KLINSKY STEVEN B Buy
437,400 shares
$3,516,053
@ $8.04
Significance 5/10

NMFC Director Klinsky buys 437.4K shares for $3.5M across 4 trades; stock down 30.5% from 52-week high.

Steven B. Klinsky, a director of New Mountain Finance Corp, executed 4 separate purchases totaling 437,400 shares for $3,516,053.41 at a blended average price of $8.04 on March 3-4, 2026, increasing his holdings from 4,441,542 to 4,878,942 shares (+9.8%). The stock is currently trading at $8.10, down 30.5% from its 52-week high of $11.65 and down 16.9% over the past 90 days. Klinsky's cross-ticker track record across 16 prior buys shows an average 90-day return of -4.3% with a 0.00% win rate, though his prior trades at NMFC have not yet reached measurable outcomes. A cluster pattern is present, with 3 other insiders also buying within the past 14 days, which may reflect differing assessments of value or routine portfolio activity across the firm's leadership.

2026-03-04
medium
Ogens David Buy
12,500 shares
$98,351
@ $7.87
Significance 4/10

Director Ogens David bought 12,500 shares of NMFC at $7.87 average on 2026-03-03; holds 241.6K shares post-transaction.

Director Ogens David executed 2 purchases totaling 12,500 shares for $98,351.00 at a blended average price of $7.87, increasing his holdings from 229.1K to 241.6K shares (+5.5%). The transaction occurred while the stock trades at $8.15, off 30.0% from its 52-week high of $11.65 and down 5.0% over 30 days. His prior 5 open-market purchases at NMFC (all dating to August and March 2025) showed a 0 of 5 success rate at the 90-day mark, with negative average 90-day returns clustering around -5.8%. His cross-ticker track record (8 prior buys) reflects similarly weak patterns: avg 90d return -5.4% with a 0.00% 90-day win rate. A cluster pattern is present—3 other insiders also bought within the past 14 days. Notably, this director's historical buying has consistently failed to precede rallies, either at this ticker or across his open-market activity elsewhere.

2026-03-03
medium
Weinstein Adam B. Buy
EVP, CAO and Director
41,707 shares
$323,701
@ $7.76
Significance 6/10

EVP Adam Weinstein buys 41,707 shares at blended avg $7.76 in 2 transactions, adding 6.0% to stake at NMFC

Adam B. Weinstein, EVP, CAO and Director of NMFC, executed 2 separate purchases totaling 41,707 shares for $323,700.71 at a blended average price of $7.76. His post-transaction holdings stand at 738,856 shares, a 6.0% increase from prior holdings. The purchases occurred when the stock was trading 32.0% below its 52-week high and down 7.2% over the preceding 30 days, yet the current price of $7.99 sits only marginally above the transaction prices. His prior NMFC trades have shown mixed timing: a September 2025 purchase faced a -6.0% 30-day return, while a November 2024 purchase achieved +9.1% over 30 days. Notably, a cluster of 3 other insiders also bought within the same 14-day window, indicating coordinated insider accumulation activity during a period of stock price weakness.

2026-03-03
medium
KLINSKY STEVEN B Buy
324,727 shares
$2,515,258
@ $7.75
Significance 4/10

Director KLINSKY STEVEN B buys 324,727 shares at $7.75 avg for $2.5M; stock -32.0% from 52-week high

Director KLINSKY STEVEN B purchased 324,727 shares across 4 separate transactions on 2026-02-27 and 2026-03-02 at blended average price of $7.75, totaling $2,515,258.05. His holdings grew 7.6% to 4,587,341 shares post-transaction. The timing follows a concerning pattern: his cross-ticker track record shows 0 of 16 prior buys achieved positive 90-day returns (avg 90d return -4.4%), and his same-ticker history at NMFC shows 0 of 3 measurable prior buys well-timed. The stock is currently trading at $7.99, down 32.0% from its 52-week high of $11.75 and down 17.7% over 90 days. A cluster of 3 other insiders also bought within the past 14 days, suggesting coordinated accumulation despite the stock's weak momentum.

2026-03-02
high
Boswerger Laura C. Holson Buy
COO
12,500 shares
$96,750
@ $7.74
Significance 7/10

COO Laura C. Holson buys 12,500 shares of NMFC at $7.74; 3 insiders bought in 14 days; stock down 19.2% in 90 days.

COO Laura C. Holson purchased 12,500 shares at $7.74, increasing her holdings by 18.2% to 81,029 shares. The transaction is part of a cluster pattern with 2 other insiders also buying within the past 14 days, suggesting coordinated or corroborating confidence at current price levels. However, the stock has declined 19.2% over 90 days and sits 34.9% below its 52-week high of $11.96, creating important context: Holson's prior three buys at NMFC in May 2023 each posted positive 90-day returns (ranging +5.4% to +5.6%), and her cross-ticker track record shows a 100% win rate across three buys with a 90-day average return of +9.6%. The current environment differs materially — the stock is now in a downtrend — making this buy a test of whether her historical timing skill transfers to a depressed price regime.

September 2025
2025-09-18
low
KLINSKY STEVEN B Buy
106,691 shares
$1,043,577
@ $9.78
Significance 4/10

Director KLINSKY STEVEN B bought 106,691 shares at $9.78 for $1,043,576.68 at NMFC on 2025-09-16

KLINSKY STEVEN B, a director, executed 2 separate purchases totaling 106,691 shares for $1,043,576.68 at a blended average price of $9.78, increasing his holdings by 2.5% to 4,370,857 shares. The transaction occurred at a price 20.1% below the 52-week high of $12.31 and occurred amid a 30-day decline of 5.4% and a 90-day decline of 5.3%. His prior trades at NMFC show a pattern of adverse timing: across 5 prior buys at this ticker, zero achieved positive 90-day returns, with losses ranging from 0.6% to 7.2%. His broader cross-ticker track record across 16 open-market buys shows an average 90-day return of -4.2% with a 0% win rate, suggesting a consistent pattern of purchases that have not subsequently recovered.

2025-09-16
medium
Weinstein Adam B. Buy
EVP, CAO and Director
49,750 shares
$498,828
@ $10.03
Significance 6/10

EVP Adam B. Weinstein buys 49,750 shares of NMFC at $10.03; holdings rise 8.3% to 652.5K shares

Adam B. Weinstein, EVP, CAO and Director, purchased 49,750 shares at $10.03 on 2025-09-15, increasing his holdings by 8.3% to 652.5K shares for a transaction value of $498.8K. His prior trade at NMFC on 2024-11-04 generated a 90-day return of +7.8%, and his cross-ticker track record shows 1 prior buy with a 90-day win rate of 100.00% and average 90d return of +7.8%. The stock is currently trading at $9.78, down 5.0% over 30 days and 5.6% over 90 days, representing -20.6% from its 52-week high of $12.31. The company trades at a P/E of 12.54 with $7.8M in net income and a $1.0B market cap, characteristics of a modestly valued financial services name.

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