# 683 Capital Management

683 Capital Management is an Asset Manager based in New York, United States.

## Overview

- **Organization type:** Asset Manager
- **Headquarters:** New York, United States
- **Region:** North America
- **Address:** New York, NY, United States
- **Founded:** 2006
- **Assets under management:** $500M - $1.5B (Altss estimate)
- **Website:** 683capital.com

## Regulatory record

- **CRD number:** 156181
- **SEC file number:** 801-73162
- **Registration status:** Registered
- **Reports private funds:** Yes
- **IAPD record:** https://adviserinfo.sec.gov/firm/summary/156181

## About

683 Capital Management is an SEC-registered investment adviser in New York, NY, registered since 2012. The firm manages $2.4 billion in regulatory assets. It has 10 employees and 5 investment advisers.

## Sectors

- Hedge Funds
- Technology
- Consumer
- Healthcare
- Financials
- Energy

## People

- Ari Zweiman — Managing Partner, Chief Investment Officer

## Questions

### Who makes investment decisions at 683 Capital?

Ari Zweiman, the firm's founder and Managing Partner, serves as Chief Investment Officer and holds final authority over all portfolio decisions. He built the firm's concentrated approach around his own research process, supported by a small team of generalist analysts who source across sectors without rigid coverage boundaries.

### What is 683 Capital's investment strategy?

The firm runs a concentrated, fundamental long-short equity strategy focused on companies undergoing structural change. Event types include spin-offs, merger arbitrage, post-bankruptcy re-equities, and management transitions. Unlike multi-manager platforms, 683 does not impose sector-neutral or market-neutral constraints — conviction drives position sizing, and top holdings can exceed 20% of the portfolio individually.

### Does 683 Capital invest in private companies or only public equities?

The firm's primary mandate is publicly traded equities and related instruments. While event-driven funds sometimes hold post-reorganization private securities temporarily, 683's core strategy operates in liquid markets — the structure simply allows it to hold positions with private-equity-style patience when a catalyst requires time to materialize.

### How does 683 Capital source its ideas?

Idea generation is proprietary and fundamental. The team screens for corporate complexity — spin-offs, regulatory changes, litigation outcomes, and management shakeups — where forced selling by index funds or sector-constrained investors creates entry points that a concentrated, unconstrained fund can exploit. The firm does not rely on sell-side research or broker-fed idea pipelines as primary inputs.

### Has 683 Capital ever taken an activist role in its portfolio companies?

Yes. In 2017, 683 launched a public activist campaign at Stewart Information Services, a title insurance company, seeking board representation and a strategic review. The engagement resulted in a sale to Fidelity National Financial that closed in 2018, demonstrating the firm's willingness to push for change when it believes management is underperforming relative to the underlying asset value.

## Related profiles

- [Mason Capital Management](https://altss.com/profile/mason-capital-management)
- [Nut Tree Capital Management](https://altss.com/profile/nut-tree-capital-management)

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Last updated: 2026-06-03T20:00:00.000Z

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