MORGENS WATERFALL VINTIADIS & CO INC ARM — ARM HOLDINGS PLC

Ownership history in MORGENS WATERFALL VINTIADIS & CO INC  ·  3 quarters on record

AI Ownership Summary

MORGENS WATERFALL VINTIADIS & CO INC reported ARM HOLDINGS PLC (ARM) in 3 quarterly 13F filings from 2024 Q1 through 2026 Q1. Peak portfolio weight reached 4.61% in 2024 Q2. The latest visible filing shows ARM at 3.73% 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 ARM ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was MORGENS WATERFALL VINTIADIS & CO INC's position in ARM HOLDINGS PLC, 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

ARM was reported at 3.73% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
4.61% in 2024 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.

ARM stock page MORGENS WATERFALL VINTIADIS & CO INC fund profile MORGENS WATERFALL VINTIADIS & CO INC full holdings
How MORGENS WATERFALL VINTIADIS & CO INC held ARM — position size vs. price
% of Fund (quarterly)    ARM price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 3 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 REDUCED — — — 20,000 -17,000 -45.9% 3.73% $3.0M 2026-05-15 $209.16
2024 Q2 ADDED — — — 37,000 +9,000 +32.1% 4.61% $6.1M 2024-08-14 $125.92
2024 Q1 INITIATED — — — 28,000 — — 2.42% $3.5M 2024-05-15 $113.67

🏢 Other funds also holding ARM

As of 2026 Q1 — sorted by position size

Renaissance Capital LLC 3Y 9.01% Hyperion Asset Management Ltd 3Y 7.71% LANSDOWNE PARTNERS (UK) LLP 3Y 7Y 7.58% Tensor Edge Capital, LLC 7.53% Alphabet Inc. 3Y 7.39% TRAN CAPITAL MANAGEMENT, L.P. 3Y 7Y 5.67% Defender Capital, LLC. 3Y 5.31% CTC Alternative Strategies, Ltd. 3Y 7Y 5.27% Analog Century Management LP 3Y 4.99% MARK ASSET MANAGEMENT LP 3Y 7Y 4.85%

FAQ About MORGENS WATERFALL VINTIADIS & CO INC and ARM

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

How long has MORGENS WATERFALL VINTIADIS & CO INC reported owning ARM?

MORGENS WATERFALL VINTIADIS & CO INC reported ARM across 3 quarterly 13F filings, from 2024 Q1 through 2026 Q1.

What was the largest reported ARM position in MORGENS WATERFALL VINTIADIS & CO INC's portfolio?

The largest reported portfolio weight for ARM was 4.61% in 2024 Q2.

What is the latest reported ARM position on this page?

The most recent filing on this page is 2026 Q1, when MORGENS WATERFALL VINTIADIS & CO INC reported 20,000 shares, equal to 3.73% of portfolio, with an estimated market value of $3.0M.

What does the chart on this ARM ownership page compare?

The chart compares MORGENS WATERFALL VINTIADIS & CO INC's quarterly ARM 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.

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