Cytokinetics, Incorporated
IT ˙ BIT ˙ US23282W6057
62,32 € 0,00 (0,00%)
2026-06-05
DEL PRIS
SecurityIT:1CYTK / Cytokinetics, Incorporated
InstitutionSphera Funds Management Ltd.
Latest Disclosed Ownership39,817 shares
Latest Disclosed Value $ 2,624,338
Sphera Funds Management Ltd. ownership in 1CYTK / Cytokinetics, Incorporated

On May 15, 2026 - Sphera Funds Management Ltd. filed a 13F-HR form disclosing ownership of 39,817 shares of Cytokinetics, Incorporated (IT:1CYTK) valued at $2,150,118 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 91,717 shares of Cytokinetics, Incorporated. This represents a change in shares of -56.59% during the quarter. The current value of the position is $2,481,395 USD.

Sphera Funds Management Ltd. has a history of taking positions in derivatives of the underlying security (1CYTK) in the form of stock options. The firm currently holds call options representing 259,300 of underlying shares valued at $17,090,464 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.

IT:1CYTK / Cytokinetics, Incorporated 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)
2026-05-15 2026-03-31 13F CYTOKINETICS COM NEW 23282W605 39,817 -51,900 -56.59 2,624 -54.97 0.4168
2026-02-17 2025-12-31 13F CYTOKINETICS COM NEW 23282W605 91,717 -69,800 -43.22 5,828 -34.35 1.1266
2025-11-14 2025-09-30 13F CYTOKINETICS COM NEW 23282W605 161,517 -165,201 -50.56 8,877 -17.77 1.8725
2025-08-14 2025-06-30 13F CYTOKINETICS COM NEW 23282W605 326,718 181,757 125.38 10,795 85.30 2.5331
2025-05-15 2025-03-31 13F CYTOKINETICS COM NEW 23282W605 144,961 -8,060 -5.27 5,826 -19.07 1.3414
2025-02-14 2024-12-31 13F CYTOKINETICS COM NEW 23282W605 153,021 -72,000 -32.00 7,198 -39.42 1.3013
2024-11-14 2024-09-30 13F CYTOKINETICS COM NEW 23282W605 225,021 -159,903 -41.54 11,881 -43.03 1.8907
2024-08-14 2024-06-30 13F CYTOKINETICS COM NEW 23282W605 384,924 103,253 36.66 20,855 5.61 2.8443
2024-05-15 2024-03-31 13F CYTOKINETICS COM NEW 23282W605 281,671 57,851 25.85 19,748 5.68 2.7746
2024-02-15 2023-12-31 13F/A-1 CYTOKINETICS COM NEW 23282W605 223,820 -10,113 -4.32 18,687 171.17 3.0075
2024-02-14 2023-12-31 13F CYTOKINETICS COM NEW 23282W605 223,820 18,687
2023-11-14 2023-09-30 13F CYTOKINETICS COM NEW 23282W605 233,933 233,933 6,892 1.2553
2020-05-14 2020-03-31 13F CYTOKINETICS COM NEW 23282W605 0 -268,747 -100.00 0 -100.00
2020-02-13 2019-12-31 13F CYTOKINETICS COM NEW 23282W605 268,747 268,747 2,851 0.2350
2018-05-10 2018-03-31 13F CYTOKINETICS COM NEW 23282W605 0 -210,000 -100.00 0 -100.00
2018-02-12 2017-12-31 13F CYTOKINETICS COM NEW 23282W605 210,000 -17,990 -7.89 1,712 -48.22 0.2009
2017-11-27 2017-09-30 13F/A-1 CYTOKINETICS COM NEW 23282W605 227,990 10,000 4.59 3,306 25.32 0.4717
2017-11-09 2017-09-30 13F CYTOKINETICS COM NEW 23282W605 227,990 10,000 3,306
2017-08-09 2017-06-30 13F CYTOKINETICS COM NEW 23282W605 217,990 65,790 43.23 2,638 34.87 0.4482
2017-05-11 2017-03-31 13F CYTOKINETICS COM NEW 23282W605 152,200 152,200 1,956 0.3824
2016-11-14 2016-09-30 13F CYTOKINETICS COM NEW 23282W605 0 -32,069 -100.00 0 -100.00
2016-08-10 2016-06-30 13F CYTOKINETICS COM NEW 23282W605 32,069 -309,875 -90.62 304 -87.39 0.0789
2016-05-16 2016-03-31 13F CYTOKINETICS COM NEW 23282W605 341,944 341,944 0.00 2,411 0.5226
2016-02-11 2015-12-31 13F Cytokinetics COM NEW 23282W605 0 -372,250 -100.00 0 -100.00
2015-11-16 2015-09-30 13F CYTOKINETICS COM NEW 23282W605 372,250 -50,000 -11.84 2,490 -12.26 0.3177
2015-08-06 2015-06-30 13F CYTOKINETICS COM NEW 23282W605 422,250 422,250 0.00 2,838 0.2780
2015-05-11 2015-03-31 13F Cytokinetics COM NEW 23282W605 0 -493,212 -100.00 0 -100.00
2015-02-12 2014-12-31 13F Cytokinetics COM NEW 23282W605 493,212 130,000 35.79 3,951 208.91 0.6731
2014-11-20 2014-09-30 13F/A-1 CYTOKINETICS COM NEW 23282W605 363,212 298,112 457.93 1,279 311.25 0.1580
2014-11-13 2014-09-30 13F CYTOKINETICS COM NEW 23282W605 363,212 1,279
2014-08-20 2014-06-30 13F/A-1 Cytokinetics COM NEW 23282W605 65,100 -64,900 -49.92 311 -74.82 0.0766
2014-08-11 2014-06-30 13F Cytokinetics COM NEW 23282W605 65,100 311
2014-05-14 2014-03-31 13F Cytokinetics COM NEW 23282W605 130,000 -37,000 -22.16 1,235 13.72 0.2819
2014-02-13 2013-12-31 13F CYTOKINETICS COM NEW 23282W605 167,000 167,000 1,086 0.3025
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
(%)
2026-05-15 2026-03-31 13F CYTOKINETICS COM NEW Call 259,300 17,090 n/a n/a n/a
2025-05-15 2025-03-31 13F CYTOKINETICS COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-02-14 2024-12-31 13F CYTOKINETICS COM NEW Call 50,000 0.00 2,352 -10.91 n/a n/a n/a
2024-11-14 2024-09-30 13F CYTOKINETICS COM NEW Call 50,000 2,640 n/a n/a n/a
2024-05-15 2024-03-31 13F CYTOKINETICS COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-02-15 2023-12-31 13F/A CYTOKINETICS COM NEW Call 35,800 -44.92 2,989 56.11 n/a n/a n/a
2024-02-14 2023-12-31 13F CYTOKINETICS COM NEW Call 35,800 2,989 n/a n/a n/a
2023-11-14 2023-09-30 13F CYTOKINETICS COM NEW Call 65,000 1,915 n/a n/a n/a
2018-02-12 2017-12-31 13F CYTOKINETICS COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2017-11-27 2017-09-30 13F/A CYTOKINETICS COM NEW Call 100,000 76,235.88 1,450 8,962.50 n/a n/a n/a
2017-11-09 2017-09-30 13F CYTOKINETICS COM NEW Call 100,000 1,450 n/a n/a n/a
2014-05-14 2014-03-31 13F Cytokinetics CALL Call 131 16 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.