ResMed Inc.
US ˙ NYSE ˙ US7611521078

SecurityRMD / ResMed Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership390,082 shares
Latest Disclosed Value $ 87,565,607
Citigroup Inc ownership in RMD / ResMed Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 390,082 shares of ResMed Inc. (US:RMD) valued at $87,565,607 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 253,815 shares of ResMed Inc.. This represents a change in shares of 53.69% during the quarter. The current value of the position is $72,734,690 USD.

Citigroup Inc has a history of taking positions in derivatives of the underlying security (RMD) 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 1,100 of underlying shares valued at $246,928 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.

RMD / ResMed Inc. 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 RESMED COM 761152107 390,082 136,267 53.69 87,566 43.23 0.0188
2026-02-13 2025-12-31 13F RESMED COM 761152107 253,815 112,120 79.13 61,136 57.62 0.0270
2025-11-10 2025-09-30 13F RESMED COM 761152107 141,695 8,810 6.63 38,786 13.13 0.0173
2025-08-11 2025-06-30 13F RESMED COM 761152107 132,885 -7,421 -5.29 34,284 9.16 0.0168
2025-05-12 2025-03-31 13F RESMED COM 761152107 140,306 44,144 45.91 31,407 42.82 0.0161
2025-02-12 2024-12-31 13F RESMED COM 761152107 96,162 -12,731 -11.69 21,991 -17.27 0.0130
2024-11-12 2024-09-30 13F RESMED COM 761152107 108,893 -2,987 -2.67 26,583 24.12 0.0154
2024-08-12 2024-06-30 13F RESMED COM 761152107 111,880 13,322 13.52 21,416 9.73 0.0137
2024-05-10 2024-03-31 13F RESMED COM 761152107 98,558 24,286 32.70 19,517 52.76 0.0128
2024-02-09 2023-12-31 13F RESMED COM 761152107 74,272 3,852 5.47 12,776 22.69 0.0090
2023-12-06 2023-09-30 13F/A-1 RESMED COM 761152107 70,420 -10,135 -12.58 10,413 -40.84 0.0078
2023-11-09 2023-09-30 13F RESMED COM 761152107 70,420 -10,135 10,413 0.0031
2023-08-10 2023-06-30 13F RESMED COM 761152107 80,555 5,774 7.72 17,601 7.48 0.0115
2023-05-11 2023-03-31 13F RESMED COM 761152107 74,781 -43,946 -37.01 16,376 -33.73 0.0115
2023-02-09 2022-12-31 13F RESMED COM 761152107 118,727 22,645 23.57 24,711 17.81 0.0197
2022-11-10 2022-09-30 13F RESMED COM 761152107 96,082 10,199 11.88 20,975 16.50 0.0150
2022-08-10 2022-06-30 13F RESMED COM 761152107 85,883 -17,767 -17.14 18,005 -28.37 0.0134
2022-05-12 2022-03-31 13F RESMED COM 761152107 103,650 -75,753 -42.23 25,137 -46.21 0.0153
2022-02-10 2021-12-31 13F RESMED COM 761152107 179,403 -13,980 -7.23 46,731 -8.31 0.0250
2021-11-10 2021-09-30 13F RESMED COM 761152107 193,383 7,485 4.03 50,966 11.21 0.0301
2021-08-10 2021-06-30 13F RESMED COM 761152107 185,898 -38,346 -17.10 45,828 5.33 0.0276
2021-05-13 2021-03-31 13F RESMED COM 761152107 224,244 7,659 3.54 43,508 -5.49 0.0281
2021-02-11 2020-12-31 13F RESMED COM 761152107 216,585 17,226 8.64 46,036 34.70 0.0272
2020-11-12 2020-09-30 13F RESMED COM 761152107 199,359 18,142 10.01 34,177 -1.78 0.0223
2020-08-12 2020-06-30 13F RESMED COM 761152107 181,217 31,461 21.01 34,795 57.75 0.0272
2020-05-12 2020-03-31 13F RESMED COM 761152107 149,756 -12,179 -7.52 22,057 -12.11 0.0199
2020-02-12 2019-12-31 13F RESMED COM 761152107 161,935 29,965 22.71 25,095 40.74 0.0182
2019-11-08 2019-09-30 13F RESMED COM 761152107 131,970 11,033 9.12 17,831 20.82 0.0141
2019-08-12 2019-06-30 13F RESMED COM 761152107 120,937 -11,481 -8.67 14,758 7.19 0.0119
2019-05-13 2019-03-31 13F RESMED COM 761152107 132,418 35,364 36.44 13,768 24.59 0.0133
2019-02-12 2018-12-31 13F RESMED COM 761152107 97,054 51,411 112.64 11,051 109.94 0.0112
2018-11-13 2018-09-30 13F RESMED COM 761152107 45,643 -317 -0.69 5,264 10.59 0.0047
2018-08-10 2018-06-30 13F RESMED COM 761152107 45,960 1,334 2.99 4,760 8.33 0.0044
2018-05-11 2018-03-31 13F RESMED COM 761152107 44,626 36,969 482.81 4,394 577.04 0.0036
2018-02-12 2017-12-31 13F RESMED COM 761152107 7,657 -35,081 -82.08 649 -80.26 0.0005
2017-11-13 2017-09-30 13F RESMED COM 761152107 42,738 23,981 127.85 3,288 125.21 0.0027
2017-08-11 2017-06-30 13F RESMED COM 761152107 18,757 15,048 405.72 1,460 446.82 0.0013
2017-05-12 2017-03-31 13F RESMED COM 761152107 3,709 -5,081 -57.80 267 -51.01 0.0002
2017-02-10 2016-12-31 13F RESMED COM 761152107 8,790 -56,282 -86.49 545 -87.07 0.0005
2016-11-10 2016-09-30 13F RESMED COM 761152107 65,072 63,500 4,039.44 4,216 4,116.00 0.0039
2016-08-12 2016-06-30 13F RESMED COM 761152107 1,572 43 2.81 100 12.36 0.0001
2016-05-13 2016-03-31 13F RESMED COM 761152107 1,529 139 10.00 89 20.27 0.0001
2016-02-12 2015-12-31 13F RESMED COM 761152107 1,390 -5 -0.36 74 2.78 0.0001
2015-11-13 2015-09-30 13F RESMED COM 761152107 1,395 -20,220 -93.55 72 -94.09 0.0001
2015-08-13 2015-06-30 13F RESMED COM 761152107 21,615 3,271 17.83 1,218 -7.45 0.0011
2015-05-14 2015-03-31 13F RESMED COM 761152107 18,344 16,162 740.70 1,316 978.69 0.0013
2015-02-17 2014-12-31 13F RESMED COM 761152107 2,182 -503 -18.73 122 -7.58 0.0001
2014-11-14 2014-09-30 13F RESMED COM 761152107 2,685 -55 -2.01 132 -4.35 0.0001
2014-08-14 2014-06-30 13F RESMED COM 761152107 2,740 723 35.85 138 53.33 0.0001
2014-05-15 2014-03-31 13F RESMED COM 761152107 2,017 -1,058,750 -99.81 90 -99.82 0.0001
2014-02-14 2013-12-31 13F RESMED COM 761152107 1,060,767 1,048,266 8,385.46 49,941 7,478.30 0.0452
2013-11-14 2013-09-30 13F RESMED COM 761152107 12,501 -12,392 -49.78 659 -41.37 0.0006
2013-08-14 2013-06-30 13F RESMED COM 761152107 24,893 24,893 1,124 0.0011
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
(%)
2025-05-12 2025-03-31 13F RESMED COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-02-12 2024-12-31 13F RESMED COM Call 25,600 -83.09 5,854 -84.16 n/a n/a n/a
2024-11-12 2024-09-30 13F RESMED COM Call 151,400 36,960 n/a n/a n/a
2022-08-10 2022-06-30 13F RESMED COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-05-12 2022-03-31 13F RESMED COM Call 10,000 2,425 n/a n/a n/a
2021-05-13 2021-03-31 13F RESMED COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-11 2020-12-31 13F RESMED COM Call 2,700 -63.01 574 -54.12 n/a n/a n/a
2020-11-12 2020-09-30 13F RESMED COM Call 7,300 -3.95 1,251 -14.26 n/a n/a n/a
2020-08-12 2020-06-30 13F RESMED COM Call 7,600 -37.70 1,459 -18.81 n/a n/a n/a
2020-05-12 2020-03-31 13F RESMED COM Call 12,200 0.83 1,797 -4.16 n/a n/a n/a
2020-02-12 2019-12-31 13F RESMED COM Call 12,100 -68.41 1,875 -63.77 n/a n/a n/a
2019-11-08 2019-09-30 13F RESMED COM Call 38,300 -10.72 5,175 -1.15 n/a n/a n/a
2019-08-12 2019-06-30 13F RESMED COM Call 42,900 31.60 5,235 54.47 n/a n/a n/a
2019-05-13 2019-03-31 13F RESMED COM Call 32,600 -5.78 3,389 -13.98 n/a n/a n/a
2019-02-12 2018-12-31 13F RESMED COM Call 34,600 23.13 3,940 210.73 n/a n/a n/a
2013-11-14 2013-09-30 13F RESMED COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2013-08-14 2013-06-30 13F RESMED COM Call 28,100 1,268 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 RESMED COM Put 1,100 -94.21 247 -94.62 n/a n/a n/a
2026-02-13 2025-12-31 13F RESMED COM Put 19,000 0.00 4,577 -12.00 n/a n/a n/a
2025-11-10 2025-09-30 13F RESMED COM Put 19,000 0.00 5,201 6.08 n/a n/a n/a
2025-08-11 2025-06-30 13F RESMED COM Put 19,000 -64.81 4,902 -59.44 n/a n/a n/a
2025-05-12 2025-03-31 13F RESMED COM Put 54,000 116.00 12,088 111.42 n/a n/a n/a
2025-02-12 2024-12-31 13F RESMED COM Put 25,000 -72.97 5,717 -74.68 n/a n/a n/a
2024-11-12 2024-09-30 13F RESMED COM Put 92,500 22,581 n/a n/a n/a
2021-05-13 2021-03-31 13F RESMED COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-11 2020-12-31 13F RESMED COM Put 7,600 -18.28 1,615 1.32 n/a n/a n/a
2020-11-12 2020-09-30 13F RESMED COM Put 9,300 -67.60 1,594 -71.07 n/a n/a n/a
2020-08-12 2020-06-30 13F RESMED COM Put 28,700 -35.51 5,510 -15.93 n/a n/a n/a
2020-05-12 2020-03-31 13F RESMED COM Put 44,500 4.22 6,554 -0.95 n/a n/a n/a
2020-02-12 2019-12-31 13F RESMED COM Put 42,700 -2.73 6,617 11.57 n/a n/a n/a
2019-11-08 2019-09-30 13F RESMED COM Put 43,900 -39.03 5,931 -32.49 n/a n/a n/a
2019-08-12 2019-06-30 13F RESMED COM Put 72,000 -1.10 8,786 16.08 n/a n/a n/a
2019-05-13 2019-03-31 13F RESMED COM Put 72,800 91.08 7,569 74.48 n/a n/a n/a
2019-02-12 2018-12-31 13F RESMED COM Put 38,100 421.92 4,338 415.20 n/a n/a n/a
2018-11-13 2018-09-30 13F RESMED COM Put 7,300 842 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.