FOX RUN MANAGEMENT, L.L.C. SLDB — SOLID BIOSCIENCES INC

Ownership history in FOX RUN MANAGEMENT, L.L.C.  ·  5 quarters on record

AI Ownership Summary

FOX RUN MANAGEMENT, L.L.C. reported SOLID BIOSCIENCES INC (SLDB) in 5 quarterly 13F filings from 2024 Q3 through 2026 Q1. Peak portfolio weight reached 0.03% in 2026 Q1. The latest visible filing shows SLDB at 0.03% 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.

What this SLDB ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was FOX RUN MANAGEMENT, L.L.C.'s position in SOLID BIOSCIENCES 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

SLDB was reported at 0.03% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.03% in 2026 Q1

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

Time in book
Holding Window
2024 Q3 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.

SLDB stock page FOX RUN MANAGEMENT, L.L.C. fund profile FOX RUN MANAGEMENT, L.L.C. full holdings
How FOX RUN MANAGEMENT, L.L.C. held SLDB — position size vs. price
% of Fund (quarterly)    SLDB price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 5 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 ADDED — — — 27,228 +2,223 +8.9% 0.03% $177K 2026-05-12 $7.72
2025 Q4 ADDED — — — 25,005 +6,491 +35.1% 0.02% $141K 2026-02-11 $6.40
2025 Q3 REDUCED 51.6% -7.8% ✅ 18,514 -19,712 -51.6% 0.02% $114K 2025-11-12 $4.74
2025 Q1 ADDED — — — 38,226 +22,773 +147.4% 0.02% $141K 2025-05-13 $2.79
2024 Q3 INITIATED — — — 15,453 — — 0.02% $108K 2024-11-12 $5.51

🏢 Other funds also holding SLDB

As of 2026 Q1 — sorted by position size

Monashee Investment Management LLC 3Y 7Y 5.56% Siren, L.L.C. 1.53% Knott David M Jr 3Y 0.2% Quantum Private Wealth, LLC 3Y 0.2% Persistent Asset Partners Ltd 0.08% Virtu Financial LLC 3Y 7Y 0.02% MIRABELLA FINANCIAL SERVICES LLP 3Y 0.01% BLAIR WILLIAM & CO/IL 3Y 7Y 0.01% GSA CAPITAL PARTNERS LLP 3Y 7Y 0.01% SFMG, LLC 3Y 7Y 0.01%

FAQ About FOX RUN MANAGEMENT, L.L.C. and SLDB

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

How long has FOX RUN MANAGEMENT, L.L.C. reported owning SLDB?

FOX RUN MANAGEMENT, L.L.C. reported SLDB across 5 quarterly 13F filings, from 2024 Q3 through 2026 Q1.

What was the largest reported SLDB position in FOX RUN MANAGEMENT, L.L.C.'s portfolio?

The largest reported portfolio weight for SLDB was 0.03% in 2026 Q1.

What is the latest reported SLDB position on this page?

The most recent filing on this page is 2026 Q1, when FOX RUN MANAGEMENT, L.L.C. reported 27,228 shares, equal to 0.03% of portfolio, with an estimated market value of $177K.

What does the chart on this SLDB ownership page compare?

The chart compares FOX RUN MANAGEMENT, L.L.C.'s quarterly SLDB 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 FOX RUN MANAGEMENT, L.L.C. time their SLDB position?

Based on 13F filing dates vs. subsequent SLDB price moves, FOX RUN MANAGEMENT, L.L.C. correctly timed 2 out of 4 reported position changes (50%). The annualised alpha on SLDB relative to SPY over the holding period was +7.4%.

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