Y-Intercept (Hong Kong) Ltd ATMU — ATMUS FILTRATION TECHNOLOGIE

Ownership history in Y-Intercept (Hong Kong) Ltd  ·  7 quarters on record

AI Ownership Summary

Y-Intercept (Hong Kong) Ltd reported ATMUS FILTRATION TECHNOLOGIE (ATMU) in 7 quarterly 13F filings from 2024 Q3 through 2026 Q3. Peak portfolio weight reached 0.09% in 2025 Q3. The latest visible filing shows ATMU 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 ATMU ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Y-Intercept (Hong Kong) Ltd's position in ATMUS FILTRATION TECHNOLOGIE, 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 Q3

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

High-water mark
Peak Conviction
0.09% in 2025 Q3

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 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.

ATMU stock page Y-Intercept (Hong Kong) Ltd fund profile Y-Intercept (Hong Kong) Ltd full holdings
How Y-Intercept (Hong Kong) Ltd held ATMU — position size vs. price
% of Fund (quarterly)    ATMU 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 Q3 ADDED — — — 35,919 +19,341 +116.7% 0.03% $1.6M 2026-10-16 $44.37
2026 Q1 REDUCED 64.2% -10.1% ✅ 16,578 -29,760 -64.2% 0.02% $941K 2026-04-27 $62.45
2025 Q4 REDUCED 46.8% +9.5% ❌ 46,338 -40,713 -46.8% 0.05% $2.4M 2026-02-13 $63.92
2025 Q3 ADDED — — — 87,051 +28,721 +49.2% 0.09% $3.9M 2025-10-31 $45.28
2025 Q2 ADDED — — — 58,330 +37,820 +184.4% 0.05% $2.1M 2025-08-01 $37.28
2024 Q4 ADDED — — — 20,510 +13,532 +193.9% 0.05% $804K 2025-02-04 $40.94
2024 Q3 INITIATED — — — 6,978 — — 0.02% $262K 2024-11-15 $42.90

🏢 Other funds also holding ATMU

As of 2026 Q3 — sorted by position size

ADIRONDACK TRUST CO 3Y 7Y 0.01% State of Alaska, Department of Revenue 3Y 7Y 0.01% ZWJ INVESTMENT COUNSEL INC 3Y 7Y 0.01% BURNEY CO/ 3Y 7Y 0.01% GAMMA Investing LLC 0.0% Retirement Wealth Solutions LLC 0.0% Atria Investments, Inc 3Y 7Y 0.0% Cedar Mountain Advisors, LLC 3Y 0.0% WOLFF WIESE MAGANA LLC 3Y 0.0% Versant Capital Management, Inc 3Y 7Y 0.0%

FAQ About Y-Intercept (Hong Kong) Ltd and ATMU

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

How long has Y-Intercept (Hong Kong) Ltd reported owning ATMU?

Y-Intercept (Hong Kong) Ltd reported ATMU across 7 quarterly 13F filings, from 2024 Q3 through 2026 Q3.

What was the largest reported ATMU position in Y-Intercept (Hong Kong) Ltd's portfolio?

The largest reported portfolio weight for ATMU was 0.09% in 2025 Q3.

What is the latest reported ATMU position on this page?

The most recent filing on this page is 2026 Q3, when Y-Intercept (Hong Kong) Ltd reported 35,919 shares, equal to 0.03% of portfolio, with an estimated market value of $1.6M.

What does the chart on this ATMU ownership page compare?

The chart compares Y-Intercept (Hong Kong) Ltd's quarterly ATMU 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 Y-Intercept (Hong Kong) Ltd time their ATMU position?

Based on 13F filing dates vs. subsequent ATMU price moves, Y-Intercept (Hong Kong) Ltd correctly timed 4 out of 6 reported position changes (67%). The annualised alpha on ATMU relative to SPY over the holding period was +415.8%.

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