Gilead Sciences, Inc.
CH ˙ SWX ˙ US3755581036
SecurityCH:GILD / Gilead Sciences, Inc.
InstitutionSectoral Asset Management Inc
Latest Disclosed Ownership27,490 shares
Latest Disclosed Value $ 4,131,624
Sectoral Asset Management Inc reports 53.70% increase in ownership of GILD / Gilead Sciences, Inc.

On May 15, 2026 - Sectoral Asset Management Inc filed a 13F-HR form disclosing ownership of 27,490 shares of Gilead Sciences, Inc. (CH:GILD) valued at $4,131,624 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 17,885 shares of Gilead Sciences, Inc.. This represents a change in shares of 53.70% 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 GILEAD SCIENCES COM 375558103 27,490 9,605 53.70 4,132 88.20 3.4223
2026-02-09 2025-12-31 13F GILEAD SCIENCES COM 375558103 17,885 -1,665 -8.52 2,195 1.15 1.7596
2025-11-14 2025-09-30 13F GILEAD SCIENCES COM 375558103 19,550 -140 -0.71 2,170 -0.60 1.3394
2025-08-14 2025-06-30 13F GILEAD SCIENCES COM 375558103 19,690 -12,330 -38.51 2,183 -39.14 1.4413
2025-05-15 2025-03-31 13F GILEAD SCIENCES COM 375558103 32,020 -19,290 -37.60 3,588 -24.31 2.7925
2025-02-14 2024-12-31 13F GILEAD SCIENCES COM 375558103 51,310 -9,755 -15.97 4,740 -7.42 3.1634
2024-11-14 2024-09-30 13F GILEAD SCIENCES COM 375558103 61,065 -7,760 -11.27 5,120 8.41 3.0240
2024-08-13 2024-06-30 13F GILEAD SCIENCES COM 375558103 68,825 30,120 77.82 4,722 66.56 1.9191
2024-05-14 2024-03-31 13F GILEAD SCIENCES COM 375558103 38,705 -2,200 -5.38 2,835 -14.43 1.1145
2024-02-14 2023-12-31 13F GILEAD SCIENCES COM 375558103 40,905 2,755 7.22 3,314 15.92 1.4269
2023-11-14 2023-09-30 13F GILEAD SCIENCES COMMON 375558103 38,150 5,468 16.73 2,859 13.50 0.5567
2023-08-11 2023-06-30 13F GILEAD SCIENCES COM 375558103 32,682 6,982 27.17 2,519 18.11 0.4200
2023-05-12 2023-03-31 13F GILEAD SCIENCES COM 375558103 25,700 -350 -1.34 2,132 -4.65 0.4098
2023-02-10 2022-12-31 13F GILEAD SCIENCES COM 375558103 26,050 -10,350 -28.43 2,236 -0.45 0.4328
2022-11-10 2022-09-30 13F GILEAD SCIENCES COM 375558103 36,400 0 0.00 2,246 -0.18 0.4425
2022-08-15 2022-06-30 13F GILEAD SCIENCES COM 375558103 36,400 11,400 45.60 2,250 51.41 0.4534
2022-05-10 2022-03-31 13F GILEAD SCIENCES COM 375558103 25,000 2,100 9.17 1,486 -10.64 0.2638
2022-02-11 2021-12-31 13F GILEAD SCIENCES COM 375558103 22,900 -6,350 -21.71 1,663 -18.60 0.2503
2021-11-15 2021-09-30 13F GILEAD SCIENCES COM 375558103 29,250 0 0.00 2,043 1.44 0.1699
2021-08-16 2021-06-30 13F GILEAD SCIENCES COM 375558103 29,250 0 0.00 2,014 6.56 0.1630
2021-05-14 2021-03-31 13F GILEAD SCIENCES COM 375558103 29,250 -300 -1.02 1,890 9.76 0.1433
2021-02-12 2020-12-31 13F GILEAD SCIENCES COM 375558103 29,550 -35,350 -54.47 1,722 -58.01 0.1213
2020-11-13 2020-09-30 13F GILEAD SCIENCES COM 375558103 64,900 -27,250 -29.57 4,101 -42.16 0.3526
2020-08-13 2020-06-30 13F GILEAD SCIENCES COM 375558103 92,150 28,500 44.78 7,090 49.01 0.6508
2020-05-13 2020-03-31 13F GILEAD SCIENCES COM 375558103 63,650 12,300 23.95 4,758 42.58 0.9133
2020-02-12 2019-12-31 13F GILEAD SCIENCES COM 375558103 51,350 -195,590 -79.21 3,337 -78.68 0.4979
2019-11-14 2019-09-30 13F GILEAD SCIENCES COM 375558103 246,940 -151,100 -37.96 15,651 -41.80 2.7001
2019-08-14 2019-06-30 13F GILEAD SCIENCES COM 375558103 398,040 -38,100 -8.74 26,892 -5.15 3.2156
2019-05-14 2019-03-31 13F GILEAD SCIENCES COM 375558103 436,140 11,250 2.65 28,353 6.68 3.4103
2019-02-12 2018-12-31 13F GILEAD SCIENCES COMMON 375558103 424,890 158,750 59.65 26,577 29.33 3.6128
2018-11-14 2018-09-30 13F GILEAD SCIENCES COM 375558103 266,140 1,940 0.73 20,549 9.79 2.1816
2018-08-13 2018-06-30 13F GILEAD SCIENCES COMMON 375558103 264,200 59,200 28.88 18,716 21.10 2.0925
2018-05-15 2018-03-31 13F GILEAD SCIENCES COMMON 375558103 205,000 205,000 15,455 1.6945
2018-02-13 2017-12-31 13F GILEAD SCIENCES COMMON 375558103 0 -234,900 -100.00 0 -100.00
2017-11-14 2017-09-30 13F GILEAD SCIENCES COMMON 375558103 234,900 234,900 19,032 2.4516
2017-02-10 2016-12-31 13F GILEAD SCIENCES COMMON 375558103 0 -524,165 -100.00 0 -100.00
2016-11-10 2016-09-30 13F GILEAD SCIENCES COMMON 375558103 524,165 48,063 10.10 41,472 4.42 4.0710
2016-08-12 2016-06-30 13F GILEAD SCIENCES COMMON 375558103 476,102 -1,150,662 -70.73 39,716 -73.42 4.1011
2016-05-13 2016-03-31 13F GILEAD SCIENCES COMMON 375558103 1,626,764 -155,534 -8.73 149,435 -17.14 7.2254
2016-02-12 2015-12-31 13F GILEAD SCIENCES COMMON 375558103 1,782,298 -74,160 -3.99 180,351 -1.06 7.6897
2015-11-13 2015-09-30 13F GILEAD SCIENCES COMMON 375558103 1,856,458 552,051 42.32 182,286 19.36 8.3506
2015-08-13 2015-06-30 13F GILEAD SCIENCES COMMON 375558103 1,304,407 -16,100 -1.22 152,720 17.86 6.3700
2015-05-14 2015-03-31 13F GILEAD SCIENCES COMMON 375558103 1,320,507 636,200 92.97 129,581 100.89 4.9205
2015-02-13 2014-12-31 13F GILEAD SCIENCES COMMON 375558103 684,307 -625,609 -47.76 64,503 -53.74 2.8932
2014-11-13 2014-09-30 13F GILEAD SCIENCES COM 375558103 1,309,916 -189,200 -12.62 139,441 12.19 5.8681
2014-08-14 2014-06-30 13F GILEAD SCIENCES COMMON 375558103 1,499,116 -558,300 -27.14 124,292 -14.74 5.2664
2014-05-14 2014-03-31 13F GILEAD SCIENCES COMMON 375558103 2,057,416 115,843 5.97 145,788 -0.02 5.9969
2014-02-12 2013-12-31 13F GILEAD SCIENCES COMMON 375558103 1,941,573 -755,114 -28.00 145,812 -14.00 6.2880
2013-11-13 2013-09-30 13F GILEAD SCIENCES COMMON 375558103 2,696,687 -234,270 -7.99 169,541 12.82 8.1575
2013-08-12 2013-06-30 13F GILEAD SCIENCES COMMON 375558103 2,930,957 2,930,957 150,270 4.4436
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.