Jump Financial, LLC JANX — JANUX THERAPEUTICS INC

Ownership history in Jump Financial, LLC  ·  8 quarters on record

AI Ownership Summary

Jump Financial, LLC reported JANUX THERAPEUTICS INC (JANX) in 8 quarterly 13F filings from 2024 Q1 through 2026 Q1. Peak portfolio weight reached 0.06% in 2025 Q2. The latest visible filing shows JANX at 0.04% 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 JANX ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Jump Financial, LLC's position in JANUX THERAPEUTICS INC, 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
2026 Q1

JANX was reported at 0.04% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.06% in 2025 Q2

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

Time in book
Holding Window
2024 Q1 to 2026 Q1

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.

JANX stock page Jump Financial, LLC fund profile Jump Financial, LLC full holdings
How Jump Financial, LLC held JANX — position size vs. price
% of Fund (quarterly)    JANX price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 7 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 ADDED — — — 221,800 +125,116 +129.4% 0.04% $3.1M 2026-05-14 $14.39
2025 Q4 REDUCED 46.2% +0.7% ❌ 96,684 -83,016 -46.2% 0.02% $1.3M 2026-02-17 $13.21
2025 Q3 REDUCED 21.3% -42.4% ✅ 179,700 -48,730 -21.3% 0.05% $4.4M 2025-11-13 $27.46
2025 Q2 ADDED — — — 228,430 +134,400 +142.9% 0.06% $5.3M 2025-08-13 $24.96
2025 Q1 ADDED — — — 94,030 +75,930 +419.5% 0.03% $2.5M 2025-05-14 $22.62
2024 Q2 ADDED — — — 18,100 +2,409 +15.4% 0.02% $758K 2024-08-14 $40.17
2024 Q1 ADDED — — — 15,691 +4,870 +45.0% 0.02% $591K 2024-05-13 $49.99
1 older quarter hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding JANX

As of 2026 Q1 — sorted by position size

Prosight Management, LP 3Y 7Y 8.09% Rangeley Capital, LLC 1.65% RA CAPITAL MANAGEMENT, L.P. 3Y 7Y 1.65% Lion Point Capital, LP 3Y 7Y 1.58% BML Capital Management, LLC 3Y 1.38% TCG Crossover Management, LLC 3Y 0.71% Logos Global Management LP 3Y 0.69% NANO CAP NEW MILLENNIUM GROWTH FUND L P 0.51% Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A. 0.44% Nantahala Capital Management, LLC 3Y 7Y 0.41%

FAQ About Jump Financial, LLC and JANX

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

How long has Jump Financial, LLC reported owning JANX?

Jump Financial, LLC reported JANX across 7 quarterly 13F filings, from 2024 Q1 through 2026 Q1.

What was the largest reported JANX position in Jump Financial, LLC's portfolio?

The largest reported portfolio weight for JANX was 0.06% in 2025 Q2.

What is the latest reported JANX position on this page?

The most recent filing on this page is 2026 Q1, when Jump Financial, LLC reported 221,800 shares, equal to 0.04% of portfolio, with an estimated market value of $3.1M.

What does the chart on this JANX ownership page compare?

The chart compares Jump Financial, LLC's quarterly JANX 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 Jump Financial, LLC time their JANX position?

Based on 13F filing dates vs. subsequent JANX price moves, Jump Financial, LLC correctly timed 4 out of 7 reported position changes (57%). The annualised alpha on JANX relative to SPY over the holding period was -53.9%.

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