Media Resources

Founder

Bonnie-Lyn de Bartok

Founder & Chief Investment Strategist, LION-S GP S.à r.l.

Bonnie-Lyn de Bartok is Founder and Chief Investment Strategist of LION-S GP S.à r.l., where she leads investment research, signal architecture and portfolio design. Her work draws on more than 35 years of experience pricing and assessing risk across 68 countries, including advisory work with corporates, governments, NGOs and institutional investors. Over more than 16 years, her proprietary research has evolved from the MacCormick Social Performance Index launched in 2010 through the S-Factor® research framework and LION-S systematic investment strategies.

About LION-S

LION-S is a Luxembourg-based investment firm focused on systematic investment strategies. The firm’s research examines structural dispersion associated with company-level operating, labour, legal, governance and supply-chain risk and its relationship with financial performance and market behaviour.

LION-S Social Risk Arbitrage

LION-S FUND SCSp (RCS Luxembourg B310614) was established in Luxembourg on 15 July 2026 and is managed by LION-S GP S.à r.l. The Fund has not commenced trading and has no actual trading-performance record. Its intended strategy is systematic global long/short equity. Investment involves risk, including loss of all capital. A market-neutral or relative-value objective does not prevent losses. LION-S FUND SCSp is an Article 6 SFDR product. It does not promote environmental or social characteristics and does not have sustainable investment as its objective.

Editorial / Attribution Notes

• Use the legal names LION-S GP S.à r.l. (RCS B303061) and LION-S FUND SCSp (RCS B310614). LION-S Social Risk Arbitrage is the commercial name used on this website.
• Use Bonnie-Lyn de Bartok, with the hyphenated given name and lowercase ‘de’.
• Describe S-Factor® as proprietary research/analytics; do not publish signal architecture or methodology.
• Do not describe LION-S Social Risk Arbitrage as an ESG, sustainable-investment, responsible-investment or impact fund.
• Deloitte serves provides independent agreed-upon procedures in relation to the historical reconstruction and methodology. A statutory Fund audit and agreed-upon procedures on historical research are separate engagements. Agreed-upon procedures do not constitute an audit of the strategy or provide assurance on investment returns.
• Bloomberg reference: LNSSGM1. Historical research results are not actual returns of LION-S FUND SCSp. The Fund has not commenced trading. A Bloomberg reference does not constitute regulatory approval, endorsement or independent verification of performance.

Press Contact