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Data from SEC EDGAR filings: company financials and 13F holdings.

Disclaimer: QW Research is provided for informational and educational purposes only and is not investment advice, a recommendation, or an offer to buy or sell any security. Data is derived from public SEC 13F filings and may be incomplete, delayed, or inaccurate. Do not make investment decisions based on this content. QW Research does not share in any profits and accepts no liability for any losses or decisions made using this information. Past performance does not predict future results.

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ABVX — Fundamentals, Valuation & Ownership | QW Research

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Abivax S.A. (ABVX)

Highly Crowded

Held by 243 of 5,944 reporting institutions (93th percentile) — extremely crowded.

Data as of Q1 2026

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No collected fundamentals to build a valuation model.

No collected fundamentals for a quality & risk analysis.

No collected fundamentals for a dividends & returns analysis.

No collected fundamentals for a capital-allocation analysis.

No collected fundamentals for a debt & leverage analysis.

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Institutional Ownership

—

of shares outstanding · 243 funds hold it

Ownership Change

—

vs last quarter

Crowding

93ᵗʰ pctl

more crowded than 93% of tracked stocks

Institutional Value

$5.6B

total position value across all 13F filers

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Institutional Holders

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Buy / Sell Volume by Quarter

Total shares institutions bought (green) vs sold (red) each quarter across all holders.

Inferred from quarter-over-quarter change in each fund's 13F position (new stakes count as buys, exits as sells). Not tick-level trades.

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Conviction-Weighted Ownership

Median weight: 2.64%Avg weight: 5.56%Max: 20.65%High conviction (>1%): 5

TCG Crossover Management,

Darwin Global Management,

Vestal Point Capital,

Caligan Partners

ADAR1 Capital Management,

CITADEL ADVISORS

WESTFIELD CAPITAL MANAGEMENT CO

Crowding AnalysisHighly Crowded

Holders243of 5,944

Avg: 68

Uncrowded93th percentileCrowded

Institutional Activity

Buy/Sell Ratio1.39x

86th percentile

166 buying119 selling

+53

New

-46

Closed

-6,855,859

Net shares

Ownership Concentration

Top 5: 33.7%Top 10: 46.7%

TCG Crossover Management,12.3%

UBS Group AG8.7%

Darwin Global Management,6.6%

MORGAN STANLEY3.2%

Vestal Point Capital,2.9%

Others (238)66.3%

Crowding AnalysisHighly Crowded

Holders243of 5,944

Avg: 68

Uncrowded93th percentileCrowded

Institutional Activity

Buy/Sell Ratio1.39x

86th percentile

166 buying119 selling

+53

New

-46

Closed

-6,855,859

Net shares

Ownership Concentration

Top 5: 33.7%Top 10: 46.7%

TCG Crossover Management,12.3%

UBS Group AG8.7%

Darwin Global Management,6.6%

MORGAN STANLEY3.2%

Vestal Point Capital,2.9%

Others (238)66.3%

Institutional Trends (8 Quarters)

No trend data available for this metric.

Ownership Map

Top 40 institutional holders — bubble size is position value, color is the move since last quarter. Hover any holder for detail.

Size by

Drag any bubble to rearrange · size = dollar value of the position

Ownership Map

Top 40 institutional holders — bubble size is position value, color is the move since last quarter. Hover any holder for detail.

Size by

Drag any bubble to rearrange · size = dollar value of the position

Performance vs. S&P 500

Total return (dividends reinvested) vs the market, from quarter-end prices.

$10,000 invested 2023-12

$124,542

ABVX · +1145%

$16,185

S&P 500 · +62%

+$108,357

ahead of the index

Total return (5Y)

+1145%

S&P 500

+62%

vs. market

+1084%

outperformed

Annualized

174.2%

mkt 21.2%

Volatility

638%

annualized

Beta

10.52

vs S&P 500

Growth of $10,000

Hover the chart to read any quarter

ABVXS&P 500

Year by year

Annual return vs the market

Hover a year to compare.

ABVX (solid)S&P 500 (outline)Green = positive year, red = negative. Number = ABVX's return.

Beat the market

1 / 3 yrs

33% win rate

Best year

+1742%

2025

Worst year

-32%

2024

Worst drawdown

-56%

recovered in 2 qtrs

Relative strength

Cumulative lead over the S&P 500

Above 0 = ahead of the S&P 500 since the window start; below 0 = behind. Rising means it's pulling ahead.

Downside

Drawdown from peak · max -56%

How far the stock fell below its prior peak. Deeper, longer drawdowns = a rougher ride to the same return.

Quarter-end, dividend-adjusted (total return). Beta & volatility from quarterly returns (annualized). Benchmark is the S&P 500 (SPY total return). Annual returns compound the quarters ending in each calendar year; the first and last years in a window may be partial. Past performance doesn't predict future results.

We haven't collected financials for ABVX yet, so it can't be scored against its Healthcare peers.