뉴마운틴 파이낸스 코퍼레이션
US ˙ NasdaqGS ˙ US6475511001

SecurityNMFC / New Mountain Finance Corporation
InstitutionCitadel Advisors Llc
ManagerKen Griffin
Latest Disclosed Ownership34,682 shares
Latest Disclosed Value $ 269,132
Citadel Advisors Llc ownership in NMFC / New Mountain Finance Corporation

On May 15, 2026 - Citadel Advisors Llc filed a 13F-HR form disclosing ownership of 34,682 shares of New Mountain Finance Corporation (US:NMFC) valued at $269,132 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 30,331 shares of New Mountain Finance Corporation. This represents a change in shares of 14.35% during the quarter. The current value of the position is $271,560 USD.

Citadel Advisors Llc has a history of taking positions in derivatives of the underlying security (NMFC) in the form of stock options. The firm currently holds call options representing 52,400 of underlying shares valued at $406,624 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

NMFC / New Mountain Finance Corporation Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F NEW MTN FIN COM 647551100 34,682 4,351 14.35 269 -3.58 0.0000
2026-02-17 2025-12-31 13F NEW MTN FIN COM 647551100 30,331 30,331 279 0.0000
2025-08-14 2025-06-30 13F NEW MTN FIN COM 647551100 0 -74,126 -100.00 0 -100.00
2025-05-15 2025-03-31 13F NEW MTN FIN COM 647551100 74,126 -81,608 -52.40 818 -53.39 0.0002
2025-02-14 2024-12-31 13F NEW MTN FIN COM 647551100 155,734 38,454 32.79 1,754 24.77 0.0003
2024-11-14 2024-09-30 13F NEW MTN FIN COM 647551100 117,280 -29,106 -19.88 1,405 -21.55 0.0003
2024-08-14 2024-06-30 13F NEW MTN FIN COM 647551100 146,386 121,289 483.28 1,792 464.98 0.0004
2024-05-15 2024-03-31 13F NEW MTN FIN COM 647551100 25,097 -188,778 -88.27 318 -88.35 0.0001
2024-02-14 2023-12-31 13F NEW MTN FIN COM 647551100 213,875 152,397 247.89 2,720 241.71 0.0005
2023-11-14 2023-09-30 13F NEW MTN FIN COM 647551100 61,478 -96,783 -61.15 796 -59.55 0.0002
2023-08-14 2023-06-30 13F NEW MTN FIN COM 647551100 158,261 18,947 13.60 1,969 16.11 0.0004
2023-05-15 2023-03-31 13F NEW MTN FIN COM 647551100 139,314 89,254 178.29 1,695 173.83 0.0004
2023-02-14 2022-12-31 13F NEW MTN FIN COM 647551100 50,060 37,736 306.20 619 335.92 0.0001
2022-11-14 2022-09-30 13F NEW MTN FIN COM 647551100 12,324 12,324 142 0.0000
2022-08-15 2022-06-30 13F NEW MTN FIN COM 647551100 0 -86,207 -100.00 0 -100.00
2022-05-16 2022-03-31 13F NEW MTN FIN COM 647551100 86,207 23,324 37.09 1,194 38.52 0.0002
2022-02-14 2021-12-31 13F NEW MTN FIN COM 647551100 62,883 62,883 862 0.0002
2022-03-11 2021-09-30 13F/A-1 NEW MTN FIN COM 647551100 0 -53,299 -100.00 0 -100.00
2021-11-15 2021-09-30 13F NEW MTN FIN COM 647551100 0 -53,299 0
2021-08-16 2021-06-30 13F NEW MTN FIN COM 647551100 53,299 -2,357 -4.23 702 1.74 0.0002
2021-05-21 2021-03-31 13F/A-1 NEW MTN FIN COM 647551100 55,656 -27,458 -33.04 690 -26.91 0.0002
2021-05-17 2021-03-31 13F NEW MTN FIN COM 647551100 55,656 -27,458 690 0.0002
2021-02-16 2020-12-31 13F NEW MTN FIN COM 647551100 83,114 83,114 49.34 944 36.81 0.0002
2020-11-16 2020-09-30 13F NEW MTN FIN Cmn 647551100 0 -36,070 -100.00 0 -100.00
2020-08-14 2020-06-30 13F NEW MTN FIN Cmn 647551100 36,070 -41,601 -53.56 335 -36.67 0.0001
2020-05-15 2020-03-31 13F NEW MTN FIN Cmn 647551100 77,671 -60,812 -43.91 529 -72.20 0.0002
2020-02-14 2019-12-31 13F NEW MTN FIN Cmn 647551100 138,483 74,693 117.09 1,903 118.99 0.0008
2019-11-14 2019-09-30 13F NEW MTN FIN Cmn 647551100 63,790 -11,688 -15.49 869 -17.55 0.0004
2019-08-14 2019-06-30 13F NEW MTN FIN Cmn 647551100 75,478 75,478 18.32 1,054 21.29 0.0005
2018-08-14 2018-06-30 13F/A-1 NEW MTN FIN Cmn 647551100 0 -22,930 -100.00 0 -100.00
2018-05-14 2018-03-31 13F/A-1 NEW MTN FIN Cmn 647551100 22,930 -46,406 -66.93 302 -67.87 0.0002
2018-05-11 2018-03-31 13F NEW MTN FIN Cmn 647551100 22,930 -46,406 302
2018-02-09 2017-12-31 13F NEW MTN FIN Cmn 647551100 69,336 58,558 543.31 940 510.39 0.0006
2017-11-09 2017-09-30 13F NEW MTN FIN Cmn 647551100 10,778 -47,214 -81.41 154 -80.70 0.0001
2017-01-31 2016-09-30 13F/A-1 NEW MTN FIN Cmn 647551100 57,992 13,946 31.66 798 40.49 0.0008
2016-11-10 2016-09-30 13F NEW MOUNTAIN FINANCE Cmn 647551100 57,992 798
2017-01-31 2016-06-30 13F/A-1 NEW MTN FIN Cmn 647551100 44,046 -90,823 -67.34 568 -66.69 0.0006
2016-08-12 2016-06-30 13F NEW MOUNTAIN FINANCE Cmn 647551100 44,046 568
2017-01-31 2016-03-31 13F/A-1 NEW MTN FIN Cmn 647551100 134,869 -10,110 -6.97 1,705 -9.69 0.0022
2016-05-13 2016-03-31 13F NEW MOUNTAIN FINANCE Cmn 647551100 134,869 1,705
2017-01-31 2015-12-31 13F/A-1 NEW MTN FIN Cmn 647551100 144,979 133,979 1,217.99 1,888 1,167.11 0.0021
2016-02-12 2015-12-31 13F NEW MOUNTAIN FINANCE Cmn 647551100 144,979 1,888
2015-11-16 2015-09-30 13F NEW MOUNTAIN FINANCE Cmn 647551100 11,000 11,000 -92.41 149 -92.11 0.0001
2015-05-15 2015-03-31 13F NEW MOUNTAIN FINANCE Cmn 647551100 0 -1,959 -100.00 0 -100.00
2015-02-17 2014-12-31 13F NEW MOUNTAIN FINANCE Cmn 647551100 1,959 -62,915 -96.98 29 -96.96 0.0000
2014-11-14 2014-09-30 13F NEW MOUNTAIN FINANCE Cmn 647551100 64,874 -413 -0.63 953 -1.85 0.0012
2014-08-14 2014-06-30 13F NEW MOUNTAIN FINANCE Cmn 647551100 65,287 30,183 85.98 971 90.02 0.0013
2014-05-15 2014-03-31 13F NEW MOUNTAIN FINANCE Cmn 647551100 35,104 35,104 511 0.0007
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F NEW MTN FIN COM Call 52,400 5.22 407 -11.35 n/a n/a n/a
2026-02-17 2025-12-31 13F NEW MTN FIN COM Call 49,800 94.53 459 86.18 n/a n/a n/a
2025-11-14 2025-09-30 13F NEW MTN FIN COM Call 25,600 1.19 247 -7.52 n/a n/a n/a
2025-08-14 2025-06-30 13F NEW MTN FIN COM Call 25,300 2.85 267 -1.85 n/a n/a n/a
2025-05-15 2025-03-31 13F NEW MTN FIN COM Call 24,600 59.74 271 56.65 n/a n/a n/a
2025-02-14 2024-12-31 13F NEW MTN FIN COM Call 15,400 29.41 173 21.83 n/a n/a n/a
2024-11-14 2024-09-30 13F NEW MTN FIN COM Call 11,900 72.46 143 69.05 n/a n/a n/a
2024-08-14 2024-06-30 13F NEW MTN FIN COM Call 6,900 -43.90 84 -45.81 n/a n/a n/a
2024-05-15 2024-03-31 13F NEW MTN FIN COM Call 12,300 -3.91 156 -4.32 n/a n/a n/a
2024-02-14 2023-12-31 13F NEW MTN FIN COM Call 12,800 -28.49 163 -29.87 n/a n/a n/a
2023-11-14 2023-09-30 13F NEW MTN FIN COM Call 17,900 62.73 232 69.85 n/a n/a n/a
2023-08-14 2023-06-30 13F NEW MTN FIN COM Call 11,000 17.02 137 19.30 n/a n/a n/a
2023-05-15 2023-03-31 13F NEW MTN FIN COM Call 9,400 -61.48 114 -62.13 n/a n/a n/a
2023-02-14 2022-12-31 13F NEW MTN FIN COM Call 24,400 -23.99 302 -18.65 n/a n/a n/a
2022-11-14 2022-09-30 13F NEW MTN FIN COM Call 32,100 63.78 370 58.80 n/a n/a n/a
2022-08-15 2022-06-30 13F NEW MTN FIN COM Call 19,600 -6.22 233 -19.38 n/a n/a n/a
2022-05-16 2022-03-31 13F NEW MTN FIN COM Call 20,900 4.50 289 5.47 n/a n/a n/a
2022-02-14 2021-12-31 13F NEW MTN FIN COM Call 20,000 9.89 274 13.22 n/a n/a n/a
2021-11-15 2021-09-30 13F NEW MTN FIN Cmn Call 18,200 14.47 242 15.79 n/a n/a n/a
2021-08-16 2021-06-30 13F NEW MTN FIN COM Call 15,900 209 n/a n/a n/a
2021-02-16 2020-12-31 13F NEW MTN FIN COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-11-16 2020-09-30 13F NEW MTN FIN COM Call 25,000 239 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2025-11-14 2025-09-30 13F NEW MTN FIN COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F NEW MTN FIN COM Put 17,000 -14.14 179 -17.89 n/a n/a n/a
2025-05-15 2025-03-31 13F NEW MTN FIN COM Put 19,800 60.98 218 57.97 n/a n/a n/a
2025-02-14 2024-12-31 13F NEW MTN FIN COM Put 12,300 583.33 138 557.14 n/a n/a n/a
2024-11-14 2024-09-30 13F NEW MTN FIN COM Put 1,800 -76.62 22 -77.66 n/a n/a n/a
2024-08-14 2024-06-30 13F NEW MTN FIN COM Put 7,700 4.05 94 1.08 n/a n/a n/a
2024-05-15 2024-03-31 13F NEW MTN FIN COM Put 7,400 4.23 94 3.33 n/a n/a n/a
2024-02-14 2023-12-31 13F NEW MTN FIN COM Put 7,100 407.14 90 400.00 n/a n/a n/a
2023-11-14 2023-09-30 13F NEW MTN FIN COM Put 1,400 -41.67 18 -37.93 n/a n/a n/a
2023-08-14 2023-06-30 13F NEW MTN FIN COM Put 2,400 -54.72 30 -54.69 n/a n/a n/a
2023-05-15 2023-03-31 13F NEW MTN FIN COM Put 5,300 194.44 65 190.91 n/a n/a n/a
2023-02-14 2022-12-31 13F NEW MTN FIN COM Put 1,800 22 n/a n/a n/a
2022-02-14 2021-12-31 13F NEW MTN FIN Cmn Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-11-15 2021-09-30 13F NEW MTN FIN Cmn Put 12,000 -49.79 160 -49.21 n/a n/a n/a
2021-08-16 2021-06-30 13F NEW MTN FIN COM Put 23,900 56.21 315 65.79 n/a n/a n/a
2021-05-21 2021-03-31 13F/A NEW MTN FIN COM Put 15,300 -1.92 190 7.34 n/a n/a n/a
2021-05-17 2021-03-31 13F NEW MTN FIN COM Put 15,300 190 n/a n/a n/a
2021-02-16 2020-12-31 13F NEW MTN FIN COM Put 15,600 177 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.