AS
American Securities LLC
High-turnover traderConcentrated strategySector-focused
Total reported value
$3.9B
Reporting period: 2026-03-31 · Number of holdings: 2
AMERICAN SECURITIES LLC disclosed 2 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $3.9B and a quarterly turnover rate of 110.3%.
Personality snowflake
- Concentration
- 100
- Portfolio Stability
- 100
- Momentum/Contrarian
- 0
- Sector conviction
- 100
- Diversification
- 4
- Sizing Uniformity
- 94.31
Recent moves
Trim AMTM
0.0% -$131.5M
New buy MWH
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | MWH | Solv Energy Inc-cl A | Stock-Other | 70.12% | +70.12% | NEW | |
| 2 | AMTM | Amentum Holdings INC | Stock-Industrials | 29.88% | -70.12% | — |
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 2 | $3.9B | 100 | |
| 2025-12-31 | 1 | $1.3B | 19 | |
| 2025-09-30 | 1 | $1.1B | 26 | |
| 2025-06-30 | 1 | $1.1B | 0 | |
| 2025-03-31 | 1 | $798.9M | 100 | |
| 2024-12-31 | 1 | $923.1M | 0 | |
| 2024-09-30 | 1 | — | 0 | |
| 2024-06-30 | 1 | — | 0 | |
| 2024-03-31 | 1 | — | 0 | |
| 2023-12-31 | 1 | $109.0M | 0 | |
| 2023-09-30 | 1 | $139.7M | 0 | |
| 2023-06-30 | 1 | $175.5M | 0 | |
| 2023-03-31 | 1 | $194.7M | 0 | |
| 2022-12-31 | 1 | $102.1M | 0 | |
| 2022-09-30 | 1 | $79.6M | 0 | |
| 2022-03-31 | 1 | $179.4M | 0 | |
| 2021-12-31 | 1 | $149.1M | 0 | |
| 2021-09-30 | 1 | $198.8M | 0 | |
| 2021-06-30 | 1 | $236.9M | 100 | |
| 2021-03-31 | 1 | $238.5M | 17 | |
| 2020-12-31 | 1 | $201.4M | 40 | |
| 2020-09-30 | 1 | $134.1M | 21 | |
| 2020-06-30 | 1 | $165.3M | 31 | |
| 2020-03-31 | 1 | $120.6M | 71 | |
| 2019-12-31 | 1 | $254.7M | 19 | |
| 2019-09-30 | 1 | $209.9M | 6 | |
| 2019-06-30 | 2 | $221.9M | 33 | 1BLBD222305A |
| 2019-03-31 | 2 | $236.7M | 14 | 1BLBD222305A |
| 2018-12-31 | 2 | $231.2M | 47 | 1BLBD222305A |
| 2018-09-30 | 2 | $374.2M | 28 | 1BLBD222305A |
| 2018-06-30 | 2 | $435.9M | 84 | 1BLBD222305A |
| 2018-03-31 | 3 | $490.0M | 20 | |
| 2017-12-31 | 3 | $496.3M | 67 | |
| 2017-09-30 | 4 | $935.5M | 22 | |
| 2017-06-30 | 5 | $858.6M | 100 | |
| 2017-03-31 | 5 | $1.8B | 16 | |
| 2016-12-31 | 5 | $2.1B | 50 | |
| 2015-12-31 | 4 | $1.3B | 23 | |
| 2014-12-31 | 4 | $1.6B | 100 | |
| 2013-09-30 | 1 | — | 0 | |
| 2013-06-30 | 1 | — | 0 |
Holding changes this quarter
American Securities LLC's most significant position changes for 2026-03-31: New buy: Solv Energy Inc-cl A (MWH).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | AMTM | Amentum Holdings INC | -70.1% | — | Unchanged |
| 2 | MWH | Solv Energy Inc-cl A | — | NEW | New buy |
FAQ
What is American Securities LLC and what type of investor is it?
American Securities LLC is a investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-03-31), the firm manages a tracked equity portfolio valued at approximately $3.9B, spread across 2 disclosed positions.
What are American Securities LLC's largest equity positions?
Based on the latest 13F filing, American Securities LLC's top holdings by market value are:
1. Solv Energy Inc-cl A (MWH) — $2.8B (70.1%)
2. Amentum Holdings INC (AMTM) — $1.2B (29.9%)
What changes did American Securities LLC make in its most recent portfolio filing?
In the latest quarter, American Securities LLC was primarily adding exposure — initiating 1 new positions and adding to 0 existing holdings. The largest of these moves: New buy: Solv Energy Inc-cl A (MWH)
What sectors does American Securities LLC focus on?
American Securities LLC is concentrated in the following sectors based on its current disclosed equity portfolio:
• Industrials: 100.0%