CenterBook Partners LP ASTL — ALGOMA STL GROUP INC

Ownership history in CenterBook Partners LP  ·  17 quarters on record

AI Ownership Summary

CenterBook Partners LP reported ALGOMA STL GROUP INC (ASTL) in 17 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 0.37% in 2024 Q1. The latest visible filing shows ASTL at 0.05% 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 ASTL ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was CenterBook Partners LP's position in ALGOMA STL GROUP 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

ASTL was reported at 0.05% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.37% in 2024 Q1

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 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.

ASTL stock page CenterBook Partners LP fund profile CenterBook Partners LP full holdings
How CenterBook Partners LP held ASTL — position size vs. price
% of Fund (quarterly)    ASTL price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 10 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 REDUCED — — — 233,509 -165,336 -41.5% 0.05% $964K 2026-05-05 $4.86
2025 Q4 ADDED — — — 398,845 +164,528 +70.2% 0.08% $1.6M 2026-02-11 $5.06
2025 Q3 REDUCED 18.5% +15.2% ❌ 234,317 -53,273 -18.5% 0.04% $833K 2025-11-07 $3.86
2025 Q2 ADDED — — — 287,590 +25,424 +9.7% 0.11% $2.0M 2025-08-12 $4.60
2025 Q1 REDUCED 35.1% +28.1% ❌ 262,166 -141,703 -35.1% 0.09% $1.4M 2025-05-09 $5.93
2024 Q4 ADDED — — — 403,869 +104,981 +35.1% 0.24% $3.9M 2025-02-13 $7.99
2024 Q3 ADDED — — — 298,888 +23,861 +8.7% 0.19% $3.1M 2024-11-14 $10.60
2024 Q2 REDUCED 56.8% +48.9% ❌ 275,027 -361,474 -56.8% 0.12% $1.9M 2024-08-12 $8.67
2024 Q1 ADDED — — — 636,501 +540,443 +562.6% 0.37% $5.4M 2024-05-10 $7.52
2023 Q4 REDUCED 55.3% -13.5% ✅ 96,058 -118,707 -55.3% 0.12% $963K 2024-02-13 $7.61
7 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding ASTL

As of 2026 Q1 — sorted by position size

FNY Investment Advisers, LLC 3Y 7Y 0.12% TERRIL BROTHERS, INC. 3Y 7Y 0.07% Net Worth Advisory Group 0.02% GSA CAPITAL PARTNERS LLP 3Y 7Y 0.01% Marex Group plc 0.01% FNY Investment Advisers, LLC 3Y 7Y 0.01% ELEMENT POINTE ADVISORS, LLC 3Y 7Y 0.01% Ulland Investment Advisors, LLC 3Y 0.0% Russell Investments Group, Ltd. 3Y 7Y 0.0% Empirical Financial Services, LLC d.b.a. Empirical Wealth Management 3Y 7Y 0.0%

FAQ About CenterBook Partners LP and ASTL

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

How long has CenterBook Partners LP reported owning ASTL?

CenterBook Partners LP reported ASTL across 10 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported ASTL position in CenterBook Partners LP's portfolio?

The largest reported portfolio weight for ASTL was 0.37% in 2024 Q1.

What is the latest reported ASTL position on this page?

The most recent filing on this page is 2026 Q1, when CenterBook Partners LP reported 233,509 shares, equal to 0.05% of portfolio, with an estimated market value of $964K.

What does the chart on this ASTL ownership page compare?

The chart compares CenterBook Partners LP's quarterly ASTL 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 CenterBook Partners LP time their ASTL position?

Based on 13F filing dates vs. subsequent ASTL price moves, CenterBook Partners LP correctly timed 5 out of 16 reported position changes (31%). The annualised alpha on ASTL relative to SPY over the holding period was -24.7%.

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