Ionis Pharmaceuticals, Inc.
GB ˙ LSE ˙ US4622221004
73,83 $ ↑0,93 (1,28%)
2026-06-03
AKTIENPREIS
SecurityGB:0JDI / Ionis Pharmaceuticals, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership146,541 shares
Latest Disclosed Value $ 11,003,764
Citigroup Inc ownership in 0JDI / Ionis Pharmaceuticals, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 146,541 shares of Ionis Pharmaceuticals, Inc. (GB:0JDI) valued at $11,019,590 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 89,340 shares of Ionis Pharmaceuticals, Inc.. This represents a change in shares of 64.03% during the quarter. The current value of the position is $10,819,122 USD.

Citigroup Inc has a history of taking positions in derivatives of the underlying security (0JDI) in the form of stock options. The firm currently holds call options representing 98,400 of underlying shares valued at $7,388,856 USD and put options representing 18,000 of underlying shares valued at $1,351,620 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
(Premium Subscription Required)

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.

GB:0JDI / Ionis Pharmaceuticals, 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 IONIS PHARMACEUTICALS COM 462222100 146,541 57,201 64.03 11,004 55.70 0.0024
2026-02-13 2025-12-31 13F IONIS PHARMACEUTICALS COM 462222100 89,340 -66,513 -42.68 7,068 -30.68 0.0031
2025-11-10 2025-09-30 13F IONIS PHARMACEUTICALS COM 462222100 155,853 -185,124 -54.29 10,196 -24.32 0.0045
2025-08-11 2025-06-30 13F IONIS PHARMACEUTICALS COM 462222100 340,977 -85,503 -20.05 13,472 4.71 0.0066
2025-05-12 2025-03-31 13F IONIS PHARMACEUTICALS COM 462222100 426,480 257,325 152.12 12,867 117.59 0.0066
2025-02-12 2024-12-31 13F IONIS PHARMACEUTICALS COM 462222100 169,155 98,860 140.64 5,914 109.98 0.0035
2024-11-12 2024-09-30 13F IONIS PHARMACEUTICALS COM 462222100 70,295 -6,323 -8.25 2,816 -22.87 0.0016
2024-08-12 2024-06-30 13F IONIS PHARMACEUTICALS COM 462222100 76,618 -146,325 -65.63 3,652 -62.22 0.0023
2024-05-10 2024-03-31 13F IONIS PHARMACEUTICALS COM 462222100 222,943 122,698 122.40 9,665 90.57 0.0063
2024-02-09 2023-12-31 13F IONIS PHARMACEUTICALS COM 462222100 100,245 -89,375 -47.13 5,071 -41.04 0.0036
2023-12-06 2023-09-30 13F/A-1 IONIS PHARMACEUTICALS COM 462222100 189,620 107,873 131.96 8,601 156.44 0.0064
2023-11-09 2023-09-30 13F IONIS PHARMACEUTICALS COM 462222100 189,620 107,873 8,601 0.0026
2023-08-10 2023-06-30 13F IONIS PHARMACEUTICALS COM 462222100 81,747 -103,226 -55.81 3,354 -49.26 0.0022
2023-05-11 2023-03-31 13F IONIS PHARMACEUTICALS COM 462222100 184,973 55,844 43.25 6,611 35.53 0.0046
2023-02-09 2022-12-31 13F IONIS PHARMACEUTICALS COM 462222100 129,129 -47,863 -27.04 4,877 -37.70 0.0039
2022-11-10 2022-09-30 13F IONIS PHARMACEUTICALS COM 462222100 176,992 27,861 18.68 7,828 41.81 0.0056
2022-08-10 2022-06-30 13F IONIS PHARMACEUTICALS COM 462222100 149,131 67,795 83.35 5,520 83.21 0.0041
2022-05-12 2022-03-31 13F IONIS PHARMACEUTICALS COM 462222100 81,336 -104,711 -56.28 3,013 -46.78 0.0018
2022-02-10 2021-12-31 13F IONIS PHARMACEUTICALS COM 462222100 186,047 64,983 53.68 5,661 39.43 0.0030
2021-11-10 2021-09-30 13F IONIS PHARMACEUTICALS COM 462222100 121,064 -121,059 -50.00 4,060 -57.97 0.0024
2021-08-10 2021-06-30 13F IONIS PHARMACEUTICALS COM 462222100 242,123 7,103 3.02 9,659 -8.60 0.0058
2021-05-13 2021-03-31 13F IONIS PHARMACEUTICALS COM 462222100 235,020 4,792 2.08 10,568 -18.81 0.0068
2021-02-11 2020-12-31 13F IONIS PHARMACEUTICALS COM 462222100 230,228 59,920 35.18 13,016 61.07 0.0077
2020-11-12 2020-09-30 13F IONIS PHARMACEUTICALS COM 462222100 170,308 4,348 2.62 8,081 -17.41 0.0053
2020-08-12 2020-06-30 13F IONIS PHARMACEUTICALS COM 462222100 165,960 -9,378 -5.35 9,785 18.03 0.0076
2020-05-12 2020-03-31 13F IONIS PHARMACEUTICALS COM 462222100 175,338 -37,948 -17.79 8,290 -35.66 0.0075
2020-02-12 2019-12-31 13F IONIS PHARMACEUTICALS COM 462222100 213,286 51,955 32.20 12,884 33.29 0.0093
2019-11-08 2019-09-30 13F IONIS PHARMACEUTICALS COM 462222100 161,331 21,553 15.42 9,666 7.59 0.0077
2019-08-12 2019-06-30 13F IONIS PHARMACEUTICALS COM 462222100 139,778 42,636 43.89 8,984 13.92 0.0073
2019-05-13 2019-03-31 13F IONIS PHARMACEUTICALS COM 462222100 97,142 -91,445 -48.49 7,886 -22.66 0.0076
2019-02-12 2018-12-31 13F IONIS PHARMACEUTICALS COM 462222100 188,587 102,568 119.24 10,196 129.79 0.0103
2018-11-13 2018-09-30 13F IONIS PHARMACEUTICALS COM 462222100 86,019 15,372 21.76 4,437 50.66 0.0040
2018-08-10 2018-06-30 13F IONIS PHARMACEUTICALS COM 462222100 70,647 6,619 10.34 2,945 4.36 0.0027
2018-05-11 2018-03-31 13F IONIS PHARMACEUTICALS COM 462222100 64,028 -44,615 -41.07 2,822 -48.35 0.0023
2018-02-12 2017-12-31 13F IONIS PHARMACEUTICALS COM 462222100 108,643 -25,340 -18.91 5,464 -19.58 0.0044
2017-11-13 2017-09-30 13F IONIS PHARMACEUTICALS COM 462222100 133,983 522 0.39 6,794 0.06 0.0056
2017-08-11 2017-06-30 13F IONIS PHARMACEUTICALS COM 462222100 133,461 28,017 26.57 6,790 60.18 0.0061
2017-05-12 2017-03-31 13F IONIS PHARMACEUTICALS COM 462222100 105,444 -23,467 -18.20 4,239 -31.26 0.0038
2017-02-10 2016-12-31 13F IONIS PHARMACEUTICALS COM 462222100 128,911 10,295 8.68 6,167 41.93 0.0056
2016-11-10 2016-09-30 13F IONIS PHARMACEUTICALS COM 462222100 118,616 1,203 1.02 4,345 58.92 0.0041
2016-08-12 2016-06-30 13F IONIS PHARMACEUTICALS COM 462222100 117,413 46,919 66.56 2,734 -4.24 0.0028
2016-05-13 2016-03-31 13F IONIS PHARMACEUTICALS COM 462222100 70,494 3,774 5.66 2,855 -30.91 0.0032
2016-02-12 2015-12-31 13F IONIS PHARMACEUTICALS COM 462222100 66,720 -23,167 -25.77 4,132 13.74 0.0041
2015-11-13 2015-09-30 13F ISIS PHARMACEUTICALS COM 464330109 89,887 -15,158 -14.43 3,633 -39.90 0.0034
2015-08-13 2015-06-30 13F ISIS PHARMACEUTICALS COM 464330109 105,045 10,841 11.51 6,045 0.77 0.0054
2015-05-14 2015-03-31 13F ISIS PHARMACEUTICALS COM 464330109 94,204 -4,910 -4.95 5,999 -1.98 0.0058
2015-02-17 2014-12-31 13F ISIS PHARMACEUTICALS COM 464330109 99,114 47,165 90.79 6,120 203.42 0.0055
2014-11-14 2014-09-30 13F ISIS PHARMACEUTICALS COM 464330109 51,949 8,677 20.05 2,017 35.37 0.0018
2014-08-14 2014-06-30 13F ISIS PHARMACEUTICALS COM 464330109 43,272 -20,624 -32.28 1,490 -46.03 0.0014
2014-05-15 2014-03-31 13F ISIS PHARMACEUTICALS COM 464330109 63,896 -9,341 -12.75 2,761 -5.38 0.0028
2014-02-14 2013-12-31 13F ISIS PHARMACEUTICALS COM 464330109 73,237 28,616 64.13 2,918 74.21 0.0026
2013-11-14 2013-09-30 13F ISIS PHARMACEUTICALS COM 464330109 44,621 22,300 99.91 1,675 179.17 0.0016
2013-08-14 2013-06-30 13F ISIS PHARMACEUTICALS COM 464330109 22,321 22,321 600 0.0006
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 IONIS PHARMACEUTICALS COM Call 98,400 257.82 7,389 239.68 n/a n/a n/a
2026-02-13 2025-12-31 13F IONIS PHARMACEUTICALS COM Call 27,500 -59.20 2,176 -50.67 n/a n/a n/a
2025-11-10 2025-09-30 13F IONIS PHARMACEUTICALS COM Call 67,400 145.09 4,409 305.99 n/a n/a n/a
2025-08-11 2025-06-30 13F IONIS PHARMACEUTICALS COM Call 27,500 -52.17 1,087 -37.37 n/a n/a n/a
2025-05-12 2025-03-31 13F IONIS PHARMACEUTICALS COM Call 57,500 143.64 1,735 110.18 n/a n/a n/a
2025-02-12 2024-12-31 13F IONIS PHARMACEUTICALS COM Call 23,600 0.00 825 -12.70 n/a n/a n/a
2024-11-12 2024-09-30 13F IONIS PHARMACEUTICALS COM Call 23,600 945 n/a n/a n/a
2024-02-09 2023-12-31 13F IONIS PHARMACEUTICALS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-12-06 2023-09-30 13F/A IONIS PHARMACEUTICALS COM Call 27,500 -52.01 1,247 -46.96 n/a n/a n/a
2023-11-09 2023-09-30 13F IONIS PHARMACEUTICALS COM Call 27,500 1,247 n/a n/a n/a
2023-08-10 2023-06-30 13F IONIS PHARMACEUTICALS COM Call 57,300 0.00 2,351 14.85 n/a n/a n/a
2023-05-11 2023-03-31 13F IONIS PHARMACEUTICALS COM Call 57,300 2,048 n/a n/a n/a
2023-02-09 2022-12-31 13F IONIS PHARMACEUTICALS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-11-10 2022-09-30 13F IONIS PHARMACEUTICALS COM Call 30,000 1,327 n/a n/a n/a
2021-05-13 2021-03-31 13F IONIS PHARMACEUTICALS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-11 2020-12-31 13F IONIS PHARMACEUTICALS COM Call 15,900 24.22 899 48.11 n/a n/a n/a
2020-11-12 2020-09-30 13F IONIS PHARMACEUTICALS COM Call 12,800 -49.41 607 -59.32 n/a n/a n/a
2020-08-12 2020-06-30 13F IONIS PHARMACEUTICALS COM Call 25,300 175.00 1,492 242.99 n/a n/a n/a
2020-05-12 2020-03-31 13F IONIS PHARMACEUTICALS COM Call 9,200 -67.83 435 -74.83 n/a n/a n/a
2020-02-12 2019-12-31 13F IONIS PHARMACEUTICALS COM Call 28,600 2.51 1,728 3.41 n/a n/a n/a
2019-11-08 2019-09-30 13F IONIS PHARMACEUTICALS COM Call 27,900 -19.60 1,671 -25.07 n/a n/a n/a
2019-08-12 2019-06-30 13F IONIS PHARMACEUTICALS COM Call 34,700 -15.37 2,230 -32.99 n/a n/a n/a
2019-05-13 2019-03-31 13F IONIS PHARMACEUTICALS COM Call 41,000 -18.65 3,328 22.13 n/a n/a n/a
2019-02-12 2018-12-31 13F IONIS PHARMACEUTICALS COM Call 50,400 29.23 2,725 35.44 n/a n/a n/a
2018-11-13 2018-09-30 13F IONIS PHARMACEUTICALS COM Call 39,000 -33.67 2,012 -17.88 n/a n/a n/a
2018-08-10 2018-06-30 13F IONIS PHARMACEUTICALS COM Call 58,800 21.24 2,450 14.59 n/a n/a n/a
2018-05-11 2018-03-31 13F IONIS PHARMACEUTICALS COM Call 48,500 -1.22 2,138 -13.44 n/a n/a n/a
2018-02-12 2017-12-31 13F IONIS PHARMACEUTICALS COM Call 49,100 4.69 2,470 3.87 n/a n/a n/a
2017-11-13 2017-09-30 13F IONIS PHARMACEUTICALS COM Call 46,900 12.47 2,378 12.12 n/a n/a n/a
2017-08-11 2017-06-30 13F IONIS PHARMACEUTICALS COM Call 41,700 33.23 2,121 68.60 n/a n/a n/a
2017-05-12 2017-03-31 13F IONIS PHARMACEUTICALS COM Call 31,300 -26.35 1,258 -38.12 n/a n/a n/a
2017-02-10 2016-12-31 13F IONIS PHARMACEUTICALS COM Call 42,500 23.19 2,033 60.84 n/a n/a n/a
2016-11-10 2016-09-30 13F IONIS PHARMACEUTICALS COM Call 34,500 4.55 1,264 64.37 n/a n/a n/a
2016-08-12 2016-06-30 13F IONIS PHARMACEUTICALS COM Call 33,000 -19.51 769 -53.70 n/a n/a n/a
2016-05-13 2016-03-31 13F IONIS PHARMACEUTICALS COM Call 41,000 -10.48 1,661 -41.43 n/a n/a n/a
2016-02-12 2015-12-31 13F IONIS PHARMACEUTICALS COM Call 45,800 5.29 2,836 61.32 n/a n/a n/a
2015-11-13 2015-09-30 13F ISIS PHARMACEUTICALS COM Call 43,500 85.11 1,758 30.03 n/a n/a n/a
2015-08-13 2015-06-30 13F ISIS PHARMACEUTICALS COM Call 23,500 -9.96 1,352 -18.65 n/a n/a n/a
2015-05-14 2015-03-31 13F ISIS PHARMACEUTICALS COM Call 26,100 63.12 1,662 286.51 n/a n/a n/a
2013-11-14 2013-09-30 13F ISIS PHARMACEUTICALS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2013-08-14 2013-06-30 13F ISIS PHARMACEUTICALS COM Call 16,000 430 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 IONIS PHARMACEUTICALS COM Put 18,000 1,352 n/a n/a n/a
2025-08-11 2025-06-30 13F IONIS PHARMACEUTICALS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-12 2025-03-31 13F IONIS PHARMACEUTICALS COM Put 30,000 27.12 905 9.70 n/a n/a n/a
2025-02-12 2024-12-31 13F IONIS PHARMACEUTICALS COM Put 23,600 0.00 825 -12.70 n/a n/a n/a
2024-11-12 2024-09-30 13F IONIS PHARMACEUTICALS COM Put 23,600 945 n/a n/a n/a
2024-02-09 2023-12-31 13F IONIS PHARMACEUTICALS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-12-06 2023-09-30 13F/A IONIS PHARMACEUTICALS COM Put 27,500 -52.01 1,247 -46.96 n/a n/a n/a
2023-11-09 2023-09-30 13F IONIS PHARMACEUTICALS COM Put 27,500 1,247 n/a n/a n/a
2023-08-10 2023-06-30 13F IONIS PHARMACEUTICALS COM Put 57,300 0.00 2,351 14.85 n/a n/a n/a
2023-05-11 2023-03-31 13F IONIS PHARMACEUTICALS COM Put 57,300 2,048 n/a n/a n/a
2023-02-09 2022-12-31 13F IONIS PHARMACEUTICALS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-11-10 2022-09-30 13F IONIS PHARMACEUTICALS COM Put 29,900 1,322 n/a n/a n/a
2021-05-13 2021-03-31 13F IONIS PHARMACEUTICALS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-11 2020-12-31 13F IONIS PHARMACEUTICALS COM Put 26,000 19.27 1,470 42.17 n/a n/a n/a
2020-11-12 2020-09-30 13F IONIS PHARMACEUTICALS COM Put 21,800 -3.11 1,034 -22.08 n/a n/a n/a
2020-08-12 2020-06-30 13F IONIS PHARMACEUTICALS COM Put 22,500 52.03 1,327 89.57 n/a n/a n/a
2020-05-12 2020-03-31 13F IONIS PHARMACEUTICALS COM Put 14,800 -60.32 700 -68.93 n/a n/a n/a
2020-02-12 2019-12-31 13F IONIS PHARMACEUTICALS COM Put 37,300 -52.24 2,253 -51.85 n/a n/a n/a
2019-11-08 2019-09-30 13F IONIS PHARMACEUTICALS COM Put 78,100 17.44 4,679 9.48 n/a n/a n/a
2019-08-12 2019-06-30 13F IONIS PHARMACEUTICALS COM Put 66,500 23.38 4,274 -2.31 n/a n/a n/a
2019-05-13 2019-03-31 13F IONIS PHARMACEUTICALS COM Put 53,900 2.08 4,375 53.29 n/a n/a n/a
2019-02-12 2018-12-31 13F IONIS PHARMACEUTICALS COM Put 52,800 58.08 2,854 65.64 n/a n/a n/a
2018-11-13 2018-09-30 13F IONIS PHARMACEUTICALS COM Put 33,400 -2.62 1,723 20.57 n/a n/a n/a
2018-08-10 2018-06-30 13F IONIS PHARMACEUTICALS COM Put 34,300 0.29 1,429 -5.24 n/a n/a n/a
2018-05-11 2018-03-31 13F IONIS PHARMACEUTICALS COM Put 34,200 -6.30 1,508 -17.86 n/a n/a n/a
2018-02-12 2017-12-31 13F IONIS PHARMACEUTICALS COM Put 36,500 -24.27 1,836 -24.88 n/a n/a n/a
2017-11-13 2017-09-30 13F IONIS PHARMACEUTICALS COM Put 48,200 -30.04 2,444 -30.27 n/a n/a n/a
2017-08-11 2017-06-30 13F IONIS PHARMACEUTICALS COM Put 68,900 54.48 3,505 95.48 n/a n/a n/a
2017-05-12 2017-03-31 13F IONIS PHARMACEUTICALS COM Put 44,600 -55.27 1,793 -62.40 n/a n/a n/a
2017-02-10 2016-12-31 13F IONIS PHARMACEUTICALS COM Put 99,700 8.02 4,769 41.01 n/a n/a n/a
2016-11-10 2016-09-30 13F IONIS PHARMACEUTICALS COM Put 92,300 118.72 3,382 244.05 n/a n/a n/a
2016-08-12 2016-06-30 13F IONIS PHARMACEUTICALS COM Put 42,200 15.93 983 -33.31 n/a n/a n/a
2016-05-13 2016-03-31 13F IONIS PHARMACEUTICALS COM Put 36,400 -14.35 1,474 -44.00 n/a n/a n/a
2016-02-12 2015-12-31 13F IONIS PHARMACEUTICALS COM Put 42,500 -35.80 2,632 -1.64 n/a n/a n/a
2015-11-13 2015-09-30 13F ISIS PHARMACEUTICALS COM Put 66,200 350.34 2,676 216.31 n/a n/a n/a
2015-08-13 2015-06-30 13F ISIS PHARMACEUTICALS COM Put 14,700 20.49 846 8.88 n/a n/a n/a
2015-05-14 2015-03-31 13F ISIS PHARMACEUTICALS COM Put 12,200 777 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.