Arm Holdings plc - Depositary Receipt (Common Stock)

SecurityARM / Arm Holdings plc - Depositary Receipt (Common Stock)
InstitutionCaption Management, LLC
Latest Disclosed Ownership50,000 shares
Latest Disclosed Value $ 7,564,000
Caption Management, LLC ownership in ARM / Arm Holdings plc - Depositary Receipt (Common Stock)

On May 15, 2026 - Caption Management, LLC filed a 13F-HR form disclosing ownership of 50,000 shares of Arm Holdings plc - Depositary Receipt (Common Stock) (US:ARM) valued at $7,564,000 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 9,250 shares of Arm Holdings plc - Depositary Receipt (Common Stock). This represents a change in shares of 440.54% during the quarter. The current value of the position is $20,591,500 USD.

Caption Management, LLC has a history of taking positions in derivatives of the underlying security (ARM) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

ARM / Arm Holdings plc - Depositary Receipt (Common Stock) Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F ARM HOLDINGS SPONSORED ADS 042068205 50,000 40,750 440.54 7,564 648.17 0.0442
2026-02-17 2025-12-31 13F ARM HOLDINGS SPONSORED ADS 042068205 9,250 1,000 12.12 1,011 -13.37 0.0069
2025-11-14 2025-09-30 13F ARM HOLDINGS SPONSORED ADS 042068205 8,250 -7,250 -46.77 1,167 -53.43 0.0091
2025-08-14 2025-06-30 13F ARM HOLDINGS SPONSORED ADS 042068205 15,500 6,800 78.16 2,507 169.75 0.0277
2025-05-15 2025-03-31 13F ARM HOLDINGS SPONSORED ADS 042068205 8,700 5,700 190.00 929 151.08 0.0089
2025-02-14 2024-12-31 13F ARM HOLDINGS SPONSORED ADS 042068205 3,000 -2,200 -42.31 370 -50.20 0.0035
2024-11-14 2024-09-30 13F ARM HOLDINGS SPONSORED ADS 042068205 5,200 4,000 333.33 744 279.08 0.0119
2024-08-14 2024-06-30 13F ARM HOLDINGS SPONSORED ADS 042068205 1,200 1,200 196 0.0030
2024-05-15 2024-03-31 13F ARM HOLDINGS SPONSORED ADR 042068205 0 -18,300 -100.00 0 -100.00
2024-02-14 2023-12-31 13F ARM HOLDINGS SPONSORED ADR 042068205 18,300 18,300 1,375 0.0185
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2024-08-14 2024-06-30 13F ARM HOLDINGS SPONSORED ADR Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F ARM HOLDINGS SPONSORED ADR Call 212,800 26,598 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F ARM HOLDINGS SPONSORED ADS Put 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-17 2025-12-31 13F ARM HOLDINGS SPONSORED ADS Put 10,000 0.00 1,093 -22.70 n/a n/a n/a
2025-11-14 2025-09-30 13F ARM HOLDINGS SPONSORED ADS Put 10,000 0.00 1,415 -12.55 n/a n/a n/a
2025-08-14 2025-06-30 13F ARM HOLDINGS SPONSORED ADS Put 10,000 0.00 1,617 51.55 n/a n/a n/a
2025-05-15 2025-03-31 13F ARM HOLDINGS SPONSORED ADS Put 10,000 0.00 1,068 -13.46 n/a n/a n/a
2025-02-14 2024-12-31 13F ARM HOLDINGS SPONSORED ADS Put 10,000 -72.97 1,234 -76.70 n/a n/a n/a
2024-11-14 2024-09-30 13F ARM HOLDINGS SPONSORED ADS Put 37,000 5,291 n/a n/a n/a
2024-08-14 2024-06-30 13F ARM HOLDINGS SPONSORED ADR Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F ARM HOLDINGS SPONSORED ADR Put 139,600 -6.93 17,449 54.80 n/a n/a n/a
2024-02-14 2023-12-31 13F ARM HOLDINGS SPONSORED ADR Put 150,000 0.00 11,272 40.40 n/a n/a n/a
2023-11-14 2023-09-30 13F ARM HOLDINGS SPONSORED ADR Put 150,000 8,028 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.