Gilead Sciences, Inc.
CH ˙ SWX ˙ US3755581036
SecurityCH:GILD / Gilead Sciences, Inc.
InstitutionBellevue Group AG
Latest Disclosed Ownership1,169,879 shares
Latest Disclosed Value $ 163,046,036
Bellevue Group AG ownership in GILD / Gilead Sciences, Inc.

On May 14, 2026 - Bellevue Group AG filed a 13F-HR form disclosing ownership of 1,169,879 shares of Gilead Sciences, Inc. (CH:GILD) valued at $163,046,036 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 52,752 shares of Gilead Sciences, Inc.. This represents a change in shares of 2,117.70% during the quarter.

Bellevue Group AG has a history of taking positions in derivatives of the underlying security (GILD) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 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.

CH:GILD / Gilead Sciences, 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)
2026-05-14 2026-03-31 13F GILEAD SCIENCES COM 375558103 1,169,879 1,117,127 2,117.70 163,046 2,418.47 3.8537
2026-02-17 2025-12-31 13F GILEAD SCIENCES COM 375558103 52,752 2,859 5.73 6,475 16.90 0.1227
2025-11-14 2025-09-30 13F GILEAD SCIENCES COM 375558103 49,893 -1,523 -2.96 5,538 -2.84 0.1151
2025-08-14 2025-06-30 13F GILEAD SCIENCES COM 375558103 51,416 -3,606 -6.55 5,700 -7.54 0.1256
2025-05-14 2025-03-31 13F GILEAD SCIENCES COM 375558103 55,022 6,593 13.61 6,165 37.83 0.1381
2025-02-14 2024-12-31 13F GILEAD SCIENCES COM 375558103 48,429 2,402 5.22 4,473 15.94 0.0861
2024-11-14 2024-09-30 13F GILEAD SCIENCES COM 375558103 46,027 7,093 18.22 3,859 44.44 0.0625
2024-08-14 2024-06-30 13F GILEAD SCIENCES COM 375558103 38,934 5,629 16.90 2,671 9.51 0.0434
2024-05-15 2024-03-31 13F GILEAD SCIENCES COM 375558103 33,305 -18,000 -35.08 2,440 -41.31 0.0372
2024-02-14 2023-12-31 13F GILEAD SCIENCES COM 375558103 51,305 -56,045 -52.21 4,156 -48.33 0.0636
2023-11-14 2023-09-30 13F GILEAD SCIENCES COM 375558103 107,350 -5,300 -4.70 8,045 -7.34 0.1296
2023-08-14 2023-06-30 13F GILEAD SCIENCES COM 375558103 112,650 12,294 12.25 8,682 4.26 0.1238
2023-05-15 2023-03-31 13F GILEAD SCIENCES COM 375558103 100,356 -29,987 -23.01 8,327 -25.59 0.1208
2023-02-14 2022-12-31 13F GILEAD SCIENCES COM 375558103 130,343 32,489 33.20 11,190 85.34 0.1485
2022-11-14 2022-09-30 13F GILEAD SCIENCES COM 375558103 97,854 22,428 29.74 6,037 29.49 0.0866
2022-08-11 2022-06-30 13F GILEAD SCIENCES COM 375558103 75,426 -8,024 -9.62 4,662 -6.03 0.0659
2022-05-13 2022-03-31 13F GILEAD SCIENCES COM 375558103 83,450 -73,550 -46.85 4,961 -56.48 0.0576
2022-02-10 2021-12-31 13F GILEAD SCIENCES COM 375558103 157,000 0 0.00 11,400 3.96 0.1175
2021-11-12 2021-09-30 13F GILEAD SCIENCES COM 375558103 157,000 46,000 41.44 10,966 43.48 0.1113
2021-08-12 2021-06-30 13F GILEAD SCIENCES COM 375558103 111,000 0 0.00 7,643 6.54 0.0746
2021-05-12 2021-03-31 13F GILEAD SCIENCES COM 375558103 111,000 26,400 31.21 7,174 45.55 0.0759
2021-02-16 2020-12-31 13F GILEAD SCIENCES COM 375558103 84,600 -39,100 -31.61 4,929 -36.95 0.0564
2020-11-16 2020-09-30 13F GILEAD SCIENCES COM 375558103 123,700 -10,800 -8.03 7,817 -24.46 0.1080
2020-08-13 2020-06-30 13F GILEAD SCIENCES COM 375558103 134,500 -10,000 -6.92 10,348 -4.21 0.1464
2020-05-14 2020-03-31 13F GILEAD SCIENCES COM 375558103 144,500 136,000 1,600.00 10,803 1,857.07 0.2095
2020-02-14 2019-12-31 13F GILEAD SCIENCES COM 375558103 8,500 -543,100 -98.46 552 -98.42 0.0088
2019-11-14 2019-09-30 13F GILEAD SCIENCES COM 375558103 551,600 -517,600 -48.41 34,960 -51.60 0.6502
2019-08-14 2019-06-30 13F GILEAD SCIENCES COM 375558103 1,069,200 991,400 1,274.29 72,235 1,328.13 1.2334
2019-05-15 2019-03-31 13F GILEAD SCIENCES COM 375558103 77,800 -45,200 -36.75 5,058 -34.26 0.2783
2019-02-12 2018-12-31 13F GILEAD SCIENCES COM 375558103 123,000 -14,500 -10.55 7,694 -27.52 0.5059
2018-11-13 2018-09-30 13F GILEAD SCIENCES COM 375558103 137,500 -22,800 -14.22 10,616 -6.52 0.6734
2018-08-07 2018-06-30 13F GILEAD SCIENCES COM 375558103 160,300 -6,900 -4.13 11,356 -9.91 0.9681
2018-05-09 2018-03-31 13F GILEAD SCIENCES COM 375558103 167,200 -13,900 -7.68 12,605 -2.84 1.2488
2018-02-14 2017-12-31 13F GILEAD SCIENCES COM 375558103 181,100 -221,441 -55.01 12,974 -60.21 1.3554
2017-11-13 2017-09-30 13F GILEAD SCIENCES COM 375558103 402,541 90,738 29.10 32,610 47.76 3.4106
2017-08-14 2017-06-30 13F GILEAD SCIENCES COM 375558103 311,803 21,375 7.36 22,069 11.88 2.6095
2017-05-11 2017-03-31 13F GILEAD SCIENCES COM 375558103 290,428 110,928 61.80 19,726 53.46 2.6287
2017-02-10 2016-12-31 13F GILEAD SCIENCES COM 375558103 179,500 23,000 14.70 12,854 3.81 2.6323
2016-11-10 2016-09-30 13F Gilead Sciences COM 375558103 156,500 0 0.00 12,382 -5.16 2.2370
2016-08-12 2016-06-30 13F Gilead Sciences COM 375558103 156,500 -76,800 -32.92 13,055 -39.08 2.4564
2016-05-16 2016-03-31 13F Gilead Sciences COM 375558103 233,300 233,300 21,431 3.8890
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
(%)
2019-08-14 2019-06-30 13F GILEAD SCIENCES COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2019-05-15 2019-03-31 13F GILEAD SCIENCES COM Call 600 174 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.