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Mangrove Partners IM, LLC
Nathaniel August · Hedge Fund · Value
Mangrove Partners IM, LLC is a value-oriented hedge fund manager headquartered in Greenwich, Connecticut. Founded in 2010 by Nathaniel August, the firm specializes in opportunistic investing across public and private markets with a focus on underfollowed investments and inefficient markets. The firm manages assets for institutional and high-net-worth investors, employing a deep value discipline to compound net worth while minimizing the risk of permanent capital loss. Mangrove’s investment approach targets special situations, catalyst-driven opportunities, and distressed securities, leveraging rigorous fundamental research and in-depth company-level analysis to identify asymmetric risk-reward profiles. The firm operates primarily in North American markets but maintains global capabilities to execute its long and short equity strategies.
Simulated Performance
| Metric | Value |
|---|---|
| Total return | +34.5% |
| YTD return | +13.6% |
| Sharpe ratio | 3.45 |
| Win rate | 79% |
| AUM | $0.9B |
| Inception | Oct 1, 2025 |
| Updated | Sep 4, 2026 |
Institution Status
| Field | Value |
|---|---|
| AUM | $0.9B |
| Turnover | Low (<15%) |
| Avg holding | 18 Months |
| Inception | Oct 1, 2025 |
| Website | https://www.mangrovepartners.com |
Current Holdings
Updated on Sep 4, 2026.
| Ticker | Name | Portfolio % | Return |
|---|---|---|---|
| INDV | Indivior PLC Ordinary Shares | 10.2% | +34.9% |
| ATMU | Atmus Filtration Technologies Inc. | 6.3% | +5.0% |
| FLYW | Flywire Corp | 6.1% | +37.7% |
| TIGO | Millicom International Cellular SA | 5.7% | +11.7% |
| BIO | Bio-Rad Laboratories Inc | 5.4% | +30.5% |
| UNP | Union Pacific Corporation | 5.0% | +8.4% |
| VISN | CommScope Holding Company, Inc. | 4.9% | +4.7% |
| KDP | Keurig Dr Pepper Inc | 4.9% | +12.3% |
| OKE | ONEOK Inc | 4.8% | +1.9% |
| PCG | PG&E Corp | 4.8% | -5.4% |
| GPC | Genuine Parts Co | 4.7% | +39.9% |
| CODI | Compass Diversified Holdings | 4.6% | +55.5% |
| MRP | Millrose Properties, Inc. | 4.6% | +3.0% |
| BILL | Bill Com Holdings Inc | 4.5% | +5.7% |
| OTEX | Open Text Corp | 4.5% | -20.6% |
| REX | REX American Resources Corporation | 4.5% | +15.6% |
| ACHC | Acadia Healthcare Company Inc | 4.4% | -2.8% |
| NWSA | News Corp A | 4.1% | +9.7% |
| APTV | Aptiv PLC | 3.0% | +5.3% |
| FIS | Fidelity National Information Services Inc | 3.0% | -11.1% |
Recent activity
| Date | Action | Ticker | Weight |
|---|---|---|---|
| Aug 31, 2026 | SELL | BILL | 3.8% → 4.5% |
| Aug 31, 2026 | SELL | TIGO | 5.9% → 5.7% |
| Aug 31, 2026 | SELL | FIS | 3.6% → 3.0% |
| Aug 31, 2026 | BUY | ACHC | 0.0% → 4.4% |
| Aug 31, 2026 | SELL | ATMU | 8.1% → 6.3% |
Investment Style Analysis
Mangrove Partners IM, LLC is widely recognized for employing a Value strategy. As of Sep 4, 2026, the firm oversees approximately $0.9B in assets under management (AUM). The portfolio demonstrates a clear preference for the Auto Parts and Drug Manufacturers - Specialty & Generic sectors, reflecting a high-conviction approach to capital allocation.
Recent Market Moves
During the latest rebalancing period ending Aug 31, Mangrove Partners IM, LLC made a significant move by reducing the position in BILL. This adjustment aligns with the fund's dynamic approach to risk management and capital deployment in current market conditions.
Investment Philosophy
Mangrove Partners follows a deep value investment philosophy centered on the belief that market prices are often inefficient due to the emotional behavior of participants. The firm seeks to compound net worth over the long term by targeting underfollowed securities, small-cap companies, and complex situations that are overlooked or misunderstood by the broader market. Their strategy emphasizes capital preservation and opportunistic alpha generation, utilizing a fundamental, bottom-up research process. Mangrove focuses on identifying investments with asymmetric risk-reward characteristics, including stressed and distressed credits, liquidations, and companies undergoing significant corporate transformations or restructurings.
Disclaimer
The content provided on this page, including the simulated portfolio performance, holdings analysis, and AI-generated insights, is for informational and educational purposes only. It does not constitute financial advice, investment recommendations, or an offer to buy or sell any securities. All data is derived from historical SEC 13F filings and other public disclosures, which have a reporting lag. The "Simulated Performance" is a hypothetical reconstruction based on past disclosures and does not represent the actual returns of the institution. Past performance is not indicative of future results. Tritonix.ai is not affiliated with Mangrove Partners IM, LLC.
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Frequently asked questions
How is the simulated portfolio for Mangrove Partners IM, LLC constructed?
This simulation is powered by Tritonix AI using official SEC filings. We focus on the "Best Ideas" by filtering for only the Top 20 largest holdings and rebalancing them to 100%. The simulation tracks performance starting from Oct 1, 2025. Our AI monitors for updates every Monday to capture major shifts. This concentrated approach highlights the manager's true stock-picking skill and mirrors their actual investment returns.
What is Mangrove Partners IM, LLC's largest holding?
As of the latest filing, Mangrove Partners IM, LLC's top position is Indivior PLC Ordinary Shares (INDV), representing 10.2% of the portfolio. This reflects a high-conviction bet by the institution.
What is Mangrove Partners IM, LLC's historical performance and risk profile?
Our simulation indicates a total return of +34.5% with a win rate of 79%. Notably, the portfolio maintains a Sharpe Ratio of 3.45, suggesting an exceptional level of risk-adjusted returns compared to the broader market.
What sectors does Mangrove Partners IM, LLC primarily invest in?
Mangrove Partners IM, LLC has a strong preference for the Auto Parts sector, which makes up 14.0% of their disclosed assets. The portfolio also has exposure to Drug Manufacturers - Specialty & Generic, indicating a specific thematic focus.
Is Mangrove Partners IM, LLC's portfolio concentrated or diversified?
Mangrove Partners IM, LLC runs a moderately concentrated portfolio with 20 disclosed positions. The top 3 holdings alone account for 22.6% of the total portfolio weight, suggesting a strategy that favors broader market exposure.
How has Mangrove Partners IM, LLC performed in 2026?
Our AI-simulated model portfolio for Mangrove Partners IM, LLC tracks a Year-to-Date (YTD) return of +13.6%. This metric helps investors gauge the institution's effectiveness in the current market environment.
Does Nathaniel August manage Mangrove Partners IM, LLC directly?
Yes, Nathaniel August serves as the key portfolio manager for Mangrove Partners IM, LLC, overseeing the investment strategy and final capital allocation decisions.