1248 Management, LLC TMUS — T-MOBILE US INC

Ownership history in 1248 Management, LLC  ·  5 quarters on record

AI Ownership Summary

1248 Management, LLC reported T-MOBILE US INC (TMUS) in 5 quarterly 13F filings from 2024 Q4 through 2025 Q4. Peak portfolio weight reached 0.58% in 2025 Q1. The latest visible filing shows TMUS at 0.12% 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 TMUS ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was 1248 Management, LLC's position in T-MOBILE US 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
2025 Q4

TMUS was reported at 0.12% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.58% in 2025 Q1

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

Time in book
Holding Window
2024 Q4 to 2025 Q4

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.

TMUS stock page 1248 Management, LLC fund profile 1248 Management, LLC full holdings
How 1248 Management, LLC held TMUS — position size vs. price
% of Fund (quarterly)    TMUS 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)
2025 Q4 REDUCED 73.5% +3.9% ❌ 1,108 -3,072 -73.5% 0.12% $225K 2026-02-14 (Est.) $218.45
2025 Q3 REDUCED 21.1% -14.7% ✅ 4,180 -1,115 -21.1% 0.56% $1.0M 2025-11-14 $213.99
2025 Q2 ADDED — — — 5,295 +1,295 +32.4% 0.47% $1.3M 2025-08-18 $251.82
2025 Q1 REDUCED 23.5% -10.3% ✅ 4,000 -1,230 -23.5% 0.58% $1.1M 2025-05-15 $236.13
2024 Q4 INITIATED — — — 5,230 — — 0.50% $1.2M 2025-02-14 $265.38

🏢 Other funds also holding TMUS

As of 2026 Q1 — sorted by position size

Overbrook Management Corp 3Y 7Y 3.07% Baker Chad R 3Y 7Y 2.89% Leibman Financial Services, Inc. 2.88% AVAII WEALTH MANAGEMENT, LLC 3Y 2.65% Advanced Asset Management Advisors Inc 3Y 7Y 2.48% HOERTKORN RICHARD CHARLES 3Y 7Y 2.29% Stillwater Capital Advisors, LLC 3Y 7Y 2.22% Reynders McVeigh Capital Management, LLC 3Y 7Y 2.18% Illumine Investment Management, LLC 2.14% Graphene Investments SAS 3Y 2.11%

FAQ About 1248 Management, LLC and TMUS

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

How long has 1248 Management, LLC reported owning TMUS?

1248 Management, LLC reported TMUS across 5 quarterly 13F filings, from 2024 Q4 through 2025 Q4.

What was the largest reported TMUS position in 1248 Management, LLC's portfolio?

The largest reported portfolio weight for TMUS was 0.58% in 2025 Q1.

What is the latest reported TMUS position on this page?

The most recent filing on this page is 2025 Q4, when 1248 Management, LLC reported 1,108 shares, equal to 0.12% of portfolio, with an estimated market value of $225K.

What does the chart on this TMUS ownership page compare?

The chart compares 1248 Management, LLC's quarterly TMUS 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 1248 Management, LLC time their TMUS position?

Based on 13F filing dates vs. subsequent TMUS price moves, 1248 Management, LLC correctly timed 0 out of 4 reported position changes (0%). The annualised alpha on TMUS relative to SPY over the holding period was -27.3%.

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