New Mountain Capital, L.L.C.

In its 13F for Q1 2024 (holdings as of March 31, 2024, filed May 15, 2024), New Mountain Capital, L.L.C. reported 2 stock positions worth $1.6 billion. Its top holding was R1 RCM (RCM) at 77.3% of the portfolio, followed by Avantor (AVTR, 22.7%). Compared with Q4 2023, it sold out of 1. The biggest sale was an exit from Alight Class A (ALIT).

Most Recent 13F
Q2 2026
Location
New York, NY
CIK
0001407718
Portfolio Value
$1.6B (Q1 2024)
SEC Filing
0001172661-24-002419 ↗ filed May 15, 2024

Holdings Value

0$500.0M$1.0B$1.5B$2.0B Q1 2024: $1.6B $1.6B Q1 2024 Q2 2024: $1.5B Q2 2024 Q3 2024: $1.7B Q3 2024 Q4 2024: $295.0M Q4 2024 Q1 2025: $226.9M Q1 2025 Q2 2025: $188.4M Q2 2025 Q3 2025: $174.7M Q3 2025 Q4 2025: $160.4M Q4 2025 Q1 2026: $109.8M Q1 2026 Q2 2026: $138.6M Q2 2026

Holdings 2 stocks · $1.6B
RCM R1 RCM Inc. 77.26% 94,408,780 $1.2B No change
AVTR Avantor Inc. 22.74% 14,000,000 $358.0M No change

Portfolio Sells Q4 2023 → Q1 2024
ALIT Alight Inc. Class A Sold out 0.00% −10.07

Portfolio Buys Q4 2023 → Q1 2024
None this quarter.

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 1$138.6MAVTR
Q1 2026 1$109.8MAVTR
Q4 2025 1$160.4MAVTR
Q3 2025 1$174.7MAVTR
Q2 2025 1$188.4MAVTR
Q1 2025 1$226.9MAVTR
Q4 2024 1$295.0MAVTR
Q3 2024 2$1.7BRCM, AVTR
Q2 2024 2$1.5BRCM, AVTR
Q1 2024 2$1.6BRCM, AVTR