MYDA Advisors LLC ARM — ARM HOLDINGS PLC

Ownership history in MYDA Advisors LLC  ·  4 quarters on record

AI Ownership Summary

MYDA Advisors LLC reported ARM HOLDINGS PLC (ARM) in 4 quarterly 13F filings from 2024 Q3 through 2026 Q2. Peak portfolio weight reached 1.19% in 2024 Q3. The latest visible filing shows ARM at 0.63% 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 ARM ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was MYDA Advisors LLC'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 Q2

ARM was reported at 0.63% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
1.19% in 2024 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 Q2

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 MYDA Advisors LLC fund profile MYDA Advisors LLC full holdings
How MYDA Advisors LLC 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 Q2 ADDED — — — 12,000 +2,000 +20.0% 0.63% $4.3M 2026-08-13 $278.65
2026 Q2 REDUCED — — — 10,000 -28,000 -73.7% 0.53% $3.5M 2026-08-13 $278.65
2024 Q3 REDUCED 5.0% -12.0% ✅ 38,000 -2,000 -5.0% 1.19% $5.4M 2024-11-13 $135.09
1 older quarter hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding ARM

As of 2026 Q2 — sorted by position size

LANSDOWNE PARTNERS (UK) LLP 3Y 7Y 15.64% TRAN CAPITAL MANAGEMENT, L.P. 3Y 7Y 9.86% Renaissance Capital LLC 3Y 8.72% Maytree Asset Management Ltd 3Y 8.38% MORGENS WATERFALL VINTIADIS & CO INC 3Y 7Y 7.3% Spear Advisors LLC 7.29% DOCK STREET ASSET MANAGEMENT INC 3Y 7Y 6.91% MARK ASSET MANAGEMENT LP 3Y 7Y 6.57% Altimeter Capital Management, LP 3Y 7Y 5.92% Evergreen Quality Fund GP, Ltd. 5.61%

FAQ About MYDA Advisors LLC and ARM

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

How long has MYDA Advisors LLC reported owning ARM?

MYDA Advisors LLC reported ARM across 3 quarterly 13F filings, from 2024 Q3 through 2026 Q2.

What was the largest reported ARM position in MYDA Advisors LLC's portfolio?

The largest reported portfolio weight for ARM was 1.19% in 2024 Q3.

What is the latest reported ARM position on this page?

The most recent filing on this page is 2026 Q2, when MYDA Advisors LLC reported 12,000 shares, equal to 0.63% of portfolio, with an estimated market value of $4.3M.

What does the chart on this ARM ownership page compare?

The chart compares MYDA Advisors LLC'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.

How well did MYDA Advisors LLC time their ARM position?

Based on 13F filing dates vs. subsequent ARM price moves, MYDA Advisors LLC correctly timed 2 out of 3 reported position changes (67%).

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