Arm Holdings plc - Depositary Receipt (Common Stock)

SecurityARM / Arm Holdings plc - Depositary Receipt (Common Stock)
InstitutionCitigroup Inc
Latest Disclosed Ownership753,058 shares
Latest Disclosed Value $ 113,922,615
Citigroup Inc ownership in ARM / Arm Holdings plc - Depositary Receipt (Common Stock)

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 753,058 shares of Arm Holdings plc - Depositary Receipt (Common Stock) (US:ARM) valued at $113,922,614 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 707,517 shares of Arm Holdings plc - Depositary Receipt (Common Stock). This represents a change in shares of 6.44% during the quarter. The current value of the position is $310,131,876 USD.

Citigroup Inc 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 234,800 of underlying shares valued at $35,520,544 USD and put options representing 38,000 of underlying shares valued at $5,748,640 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)
2026-05-11 2026-03-31 13F ARM HOLDINGS SPONSORED ADS 042068205 753,058 45,541 6.44 113,923 47.30 0.0486
2026-02-13 2025-12-31 13F ARM HOLDINGS SPONSORED ADS 042068205 707,517 188,191 36.24 77,339 5.25 0.0341
2025-11-10 2025-09-30 13F ARM HOLDINGS SPONSORED ADS 042068205 519,326 -76,862 -12.89 73,479 -23.80 0.0328
2025-08-11 2025-06-30 13F ARM HOLDINGS SPONSORED ADS 042068205 596,188 -87,213 -12.76 96,427 32.13 0.0474
2025-05-12 2025-03-31 13F ARM HOLDINGS SPONSORED ADS 042068205 683,401 -36,880 -5.12 72,980 -17.86 0.0373
2025-02-12 2024-12-31 13F ARM HOLDINGS SPONSORED ADS 042068205 720,281 75,239 11.66 88,854 -3.68 0.0527
2024-11-12 2024-09-30 13F ARM HOLDINGS SPONSORED ADS 042068205 645,042 316,968 96.61 92,247 71.85 0.0534
2024-08-12 2024-06-30 13F ARM HOLDINGS SPONSORED ADS 042068205 328,074 146,386 80.57 53,679 136.38 0.0344
2024-05-10 2024-03-31 13F ARM HOLDINGS SPONSORED ADR 042068205 181,688 113,478 166.37 22,709 343.10 0.0149
2024-02-09 2023-12-31 13F ARM HOLDINGS SPONSORED ADR 042068205 68,210 61,777 960.31 5,126 1,389.83 0.0036
2023-12-06 2023-09-30 13F/A-1 ARM HOLDINGS SPONSORED ADR 042068205 6,433 6,433 344 0.0003
2023-11-09 2023-09-30 13F ARM HOLDINGS SPONSORED ADR 042068205 6,433 6,433 344 0.0001
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
(%)
2026-05-11 2026-03-31 13F ARM HOLDINGS SPONSORED ADS Call 234,800 286.18 35,521 434.46 n/a n/a n/a
2026-02-13 2025-12-31 13F ARM HOLDINGS SPONSORED ADS Call 60,800 0.00 6,646 -22.74 n/a n/a n/a
2025-11-10 2025-09-30 13F ARM HOLDINGS SPONSORED ADS Call 60,800 310.81 8,603 259.47 n/a n/a n/a
2025-08-11 2025-06-30 13F ARM HOLDINGS SPONSORED ADS Call 14,800 0.00 2,394 51.46 n/a n/a n/a
2025-05-12 2025-03-31 13F ARM HOLDINGS SPONSORED ADS Call 14,800 -80.40 1,580 -83.03 n/a n/a n/a
2025-02-12 2024-12-31 13F ARM HOLDINGS SPONSORED ADS Call 75,500 -6.21 9,314 -19.10 n/a n/a n/a
2024-11-12 2024-09-30 13F ARM HOLDINGS SPONSORED ADS Call 80,500 0.00 11,512 -12.60 n/a n/a n/a
2024-08-12 2024-06-30 13F ARM HOLDINGS SPONSORED ADS Call 80,500 0.00 13,171 30.91 n/a n/a n/a
2024-05-10 2024-03-31 13F ARM HOLDINGS SPONSORED ADR Call 80,500 10,062 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
(%)
2026-05-11 2026-03-31 13F ARM HOLDINGS SPONSORED ADS Put 38,000 -56.42 5,749 -39.69 n/a n/a n/a
2026-02-13 2025-12-31 13F ARM HOLDINGS SPONSORED ADS Put 87,200 -14.68 9,532 -34.09 n/a n/a n/a
2025-11-10 2025-09-30 13F ARM HOLDINGS SPONSORED ADS Put 102,200 -4.93 14,460 -16.83 n/a n/a n/a
2025-08-11 2025-06-30 13F ARM HOLDINGS SPONSORED ADS Put 107,500 -17.31 17,387 25.25 n/a n/a n/a
2025-05-12 2025-03-31 13F ARM HOLDINGS SPONSORED ADS Put 130,000 89.23 13,883 63.82 n/a n/a n/a
2025-02-12 2024-12-31 13F ARM HOLDINGS SPONSORED ADS Put 68,700 0.00 8,475 -13.74 n/a n/a n/a
2024-11-12 2024-09-30 13F ARM HOLDINGS SPONSORED ADS Put 68,700 -26.68 9,825 -35.92 n/a n/a n/a
2024-08-12 2024-06-30 13F ARM HOLDINGS SPONSORED ADS Put 93,700 0.54 15,331 31.61 n/a n/a n/a
2024-05-10 2024-03-31 13F ARM HOLDINGS SPONSORED ADR Put 93,200 11,649 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.