Ikarian Capital, LLC ARGX — ARGENX SE

Ownership history in Ikarian Capital, LLC  ·  15 quarters on record

AI Ownership Summary

Ikarian Capital, LLC reported ARGENX SE (ARGX) in 15 quarterly 13F filings from 2023 Q4 through 2025 Q3. Peak portfolio weight reached 2.78% in 2023 Q4. The latest visible filing shows ARGX at 0.43% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this ARGX ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Ikarian Capital, LLC's position in ARGENX SE, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2025 Q3

ARGX was reported at 0.43% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
2.78% in 2023 Q4

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2023 Q4 to 2025 Q3

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

ARGX stock page Ikarian Capital, LLC fund profile Ikarian Capital, LLC full holdings
How Ikarian Capital, LLC held ARGX — position size vs. price
% of Fund (quarterly)    ARGX price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 4 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q3 REDUCED 91.5% +13.5% ❌ 5,942 -64,058 -91.5% 0.43% $4.3M 2025-11-14 $907.98
2023 Q4 REDUCED 10.4% +4.4% ❌ 70,000 -8,100 -10.4% 2.48% $26.5M 2024-02-14 $390.27
2023 Q4 UNCHANGED — — — 78,100 — 0% 2.78% $29.7M 2024-02-14 $390.27
2023 Q4 ADDED — — — 78,100 +40,100 +105.5% 2.78% $29.7M 2024-02-14 $390.27
11 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding ARGX

As of 2026 Q1 — sorted by position size

Shepherd Street Advisors LLC 1.07% CVFG LLC 0.77% TEALWOOD ASSET MANAGEMENT INC 3Y 7Y 0.63% SWS Partners 3Y 7Y 0.5% WESPAC Advisors SoCal, LLC 3Y 7Y 0.39% PSP Research LLC 0.33% Perpetual Ltd 3Y 7Y 0.32% China Universal Asset Management Co., Ltd. 3Y 0.28% Yorktown Management & Research Co Inc 3Y 7Y 0.26% TANDEM CAPITAL MANAGEMENT CORP /ADV 3Y 0.25%

FAQ About Ikarian Capital, LLC and ARGX

These are the practical questions this page is built to answer before you even open the full history table.

How long has Ikarian Capital, LLC reported owning ARGX?

Ikarian Capital, LLC reported ARGX across 4 quarterly 13F filings, from 2023 Q4 through 2025 Q3.

What was the largest reported ARGX position in Ikarian Capital, LLC's portfolio?

The largest reported portfolio weight for ARGX was 2.78% in 2023 Q4.

What is the latest reported ARGX position on this page?

The most recent filing on this page is 2025 Q3, when Ikarian Capital, LLC reported 5,942 shares, equal to 0.43% of portfolio, with an estimated market value of $4.3M.

What does the chart on this ARGX ownership page compare?

The chart compares Ikarian Capital, LLC's quarterly ARGX portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did Ikarian Capital, LLC time their ARGX position?

Based on 13F filing dates vs. subsequent ARGX price moves, Ikarian Capital, LLC correctly timed 5 out of 13 reported position changes (38%). The annualised alpha on ARGX relative to SPY over the holding period was -12.0%.

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