아이오니스 파마슈티컬스(Ionis Pharmaceuticals, Inc.)
MX ˙ BMV ˙ US4622221004
SecurityMX:IONS / Ionis Pharmaceuticals, Inc.
InstitutionUtah Retirement Systems
Latest Disclosed Ownership8,300 shares
Latest Disclosed Value $ 623,247
Utah Retirement Systems ownership in IONS / Ionis Pharmaceuticals, Inc.

On May 15, 2026 - Utah Retirement Systems filed a 13F-HR form disclosing ownership of 8,300 shares of Ionis Pharmaceuticals, Inc. (MX:IONS) valued at $623,247 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 8,300 shares of Ionis Pharmaceuticals, Inc.. This represents a change in shares of 0.00% during the quarter.

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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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 IONIS PHARMACEUTICALS COM 462222100 8,300 0 0.00 623 -5.03 0.0064
2026-02-17 2025-12-31 13F IONIS PHARMACEUTICALS COM 462222100 8,300 0 0.00 657 21.03 0.0062
2025-11-14 2025-09-30 13F IONIS PHARMACEUTICALS COM 462222100 8,300 -100 -1.19 543 63.75 0.0053
2025-08-14 2025-06-30 13F IONIS PHARMACEUTICALS COM 462222100 8,400 0 0.00 332 30.83 0.0035
2025-05-15 2025-03-31 13F IONIS PHARMACEUTICALS COM 462222100 8,400 0 0.00 253 -13.65 0.0029
2025-02-14 2024-12-31 13F IONIS PHARMACEUTICALS COM 462222100 8,400 0 0.00 294 -12.80 0.0032
2024-11-14 2024-09-30 13F IONIS PHARMACEUTICALS COM 462222100 8,400 500 6.33 337 -10.64 0.0038
2024-08-14 2024-06-30 13F IONIS PHARMACEUTICALS COM 462222100 7,900 0 0.00 377 9.94 0.0045
2024-05-15 2024-03-31 13F IONIS PHARMACEUTICALS COM 462222100 7,900 0 0.00 342 -14.29 0.0040
2024-02-14 2023-12-31 13F IONIS PHARMACEUTICALS COM 462222100 7,900 200 2.60 400 14.33 0.0051
2023-11-14 2023-09-30 13F IONIS PHARMACEUTICALS COM 462222100 7,700 200 2.67 349 13.68 0.0050
2023-08-14 2023-06-30 13F IONIS PHARMACEUTICALS COM 462222100 7,500 0 0.00 308 14.55 0.0043
2023-05-16 2023-03-31 13F IONIS PHARMACEUTICALS COM 462222100 7,500 0 0.00 268 -5.30 0.0039
2023-02-15 2022-12-31 13F IONIS PHARMACEUTICALS COM 462222100 7,500 0 0.00 283 -14.76 0.0045
2022-11-14 2022-09-30 13F IONIS PHARMACEUTICALS COM 462222100 7,500 100 1.35 332 21.17 0.0055
2022-08-16 2022-06-30 13F IONIS PHARMACEUTICALS COM 462222100 7,400 0 0.00 274 0.00 0.0044
2022-05-13 2022-03-31 13F IONIS PHARMACEUTICALS COM 462222100 7,400 -18,009 -70.88 274 -64.55 0.0036
2022-02-14 2021-12-31 13F IONIS PHARMACEUTICALS COM 462222100 25,409 100 0.40 773 -8.95 0.0096
2021-11-16 2021-09-30 13F IONIS PHARMACEUTICALS COM 462222100 25,309 -1,400 -5.24 849 -20.28 0.0115
2021-08-16 2021-06-30 13F IONIS PHARMACEUTICALS COM 462222100 26,709 1,600 6.37 1,065 -5.67 0.0137
2021-05-17 2021-03-31 13F IONIS PHARMACEUTICALS COM 462222100 25,109 -1,100 -4.20 1,129 -23.77 0.0157
2021-02-16 2020-12-31 13F IONIS PHARMACEUTICALS COM 462222100 26,209 1,200 4.80 1,481 24.77 0.0210
2020-11-16 2020-09-30 13F IONIS PHARMACEUTICALS COM 462222100 25,009 100 0.40 1,187 -19.14 0.0197
2020-08-13 2020-06-30 13F/A-1 IONIS PHARMACEUTICALS COM 462222100 24,909 500 2.05 1,468 27.21 0.0269
2020-08-13 2020-06-30 13F IONIS PHARMACEUTICALS COM 462222100 24,909 500 1,468 26,943.7393
2020-05-15 2020-03-31 13F IONIS PHARMACEUTICALS COM 462222100 24,409 0 0.00 1,154 -21.71 0.0250
2020-02-12 2019-12-31 13F IONIS PHARMACEUTICALS COM 462222100 24,409 100 0.41 1,474 1.17 0.0259
2019-11-14 2019-09-30 13F IONIS PHARMACEUTICALS COM 462222100 24,309 300 1.25 1,457 -5.57 0.0277
2019-08-14 2019-06-30 13F IONIS PHARMACEUTICALS COM 462222100 24,009 429 1.82 1,543 -19.38 0.0296
2019-05-15 2019-03-31 13F IONIS PHARMACEUTICALS COM 462222100 23,580 280 1.20 1,914 51.90 0.0379
2019-02-08 2018-12-31 13F IONIS PHARMACEUTICALS COM 462222100 23,300 100 0.43 1,260 5.35 0.0285
2018-11-13 2018-09-30 13F IONIS PHARMACEUTICALS COM 462222100 23,200 100 0.43 1,196 24.20 0.0232
2018-08-10 2018-06-30 13F IONIS PHARMACEUTICALS COM 462222100 23,100 100 0.43 963 -5.03 0.0199
2018-05-15 2018-03-31 13F IONIS PHARMACEUTICALS COM 462222100 23,000 0 0.00 1,014 -12.36 0.0216
2018-02-14 2017-12-31 13F IONIS PHARMACEUTICALS COM 462222100 23,000 400 1.77 1,157 1.05 0.0243
2017-11-13 2017-09-30 13F IONIS PHARMACEUTICALS COM 462222100 22,600 0 0.00 1,145 -0.35 0.0258
2017-08-08 2017-06-30 13F IONIS PHARMACEUTICALS COM 462222100 22,600 600 2.73 1,149 29.98 0.0268
2017-05-11 2017-03-31 13F IONIS PHARMACEUTICALS COM 462222100 22,000 100 0.46 884 -15.65 0.0211
2017-02-10 2016-12-31 13F IONIS PHARMACEUTICALS COM 462222100 21,900 0 0.00 1,048 30.51 0.0264
2016-11-07 2016-09-30 13F IONIS PHARMACEUTICALS COM 462222100 21,900 0 0.00 803 57.45 0.0208
2016-08-03 2016-06-30 13F IONIS PHARMACEUTICALS COM 462222100 21,900 500 2.34 510 -41.11 0.0136
2016-05-10 2016-03-31 13F IONIS PHARMACEUTICALS COM 462222100 21,400 0 0.00 866 -34.64 0.0235
2016-02-11 2015-12-31 13F IONIS PHARMACEUTICALS COM 462222100 21,400 0 0.00 1,325 53.18 0.0359
2015-11-03 2015-09-30 13F ISIS PHARMACEUTICALS COM 464330109 21,400 100 0.47 865 -29.45 0.0248
2015-08-11 2015-06-30 13F ISIS PHARMACEUTICALS COM 464330109 21,300 21,300 1,226 0.0326
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.