Cytokinetics, Incorporated
US ˙ NasdaqGS ˙ US23282W6057

SecurityCYTK / Cytokinetics, Incorporated
InstitutionCitigroup Inc
Latest Disclosed Ownership249,243 shares
Latest Disclosed Value $ 16,427,606
Citigroup Inc ownership in CYTK / Cytokinetics, Incorporated

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 249,243 shares of Cytokinetics, Incorporated (US:CYTK) valued at $16,427,606 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 102,101 shares of Cytokinetics, Incorporated. This represents a change in shares of 144.11% during the quarter. The current value of the position is $17,623,973 USD.

Citigroup Inc has a history of taking positions in derivatives of the underlying security (CYTK) in the form of stock options. The firm currently holds call options representing 56,000 of underlying shares valued at $3,690,960 USD and put 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.

CYTK / 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)
2026-05-11 2026-03-31 13F CYTOKINETICS COM NEW 23282W605 249,243 147,142 144.11 16,428 153.23 0.0035
2026-02-13 2025-12-31 13F CYTOKINETICS COM NEW 23282W605 102,101 37,203 57.33 6,487 81.91 0.0029
2025-11-10 2025-09-30 13F CYTOKINETICS COM NEW 23282W605 64,898 -79,939 -55.19 3,567 -25.48 0.0016
2025-08-11 2025-06-30 13F CYTOKINETICS COM NEW 23282W605 144,837 -160,758 -52.60 4,785 -61.04 0.0024
2025-05-12 2025-03-31 13F CYTOKINETICS COM NEW 23282W605 305,595 10,465 3.55 12,282 -11.53 0.0063
2025-02-12 2024-12-31 13F CYTOKINETICS COM NEW 23282W605 295,130 105,285 55.46 13,883 38.50 0.0082
2024-11-12 2024-09-30 13F CYTOKINETICS COM NEW 23282W605 189,845 58,491 44.53 10,024 40.85 0.0058
2024-08-12 2024-06-30 13F CYTOKINETICS COM NEW 23282W605 131,354 -32,845 -20.00 7,117 -38.18 0.0046
2024-05-10 2024-03-31 13F CYTOKINETICS COM NEW 23282W605 164,199 5,225 3.29 11,512 -13.27 0.0076
2024-02-09 2023-12-31 13F CYTOKINETICS COM NEW 23282W605 158,974 16,260 11.39 13,273 215.70 0.0094
2023-12-06 2023-09-30 13F/A-1 CYTOKINETICS COM NEW 23282W605 142,714 -32,789 -18.68 4,204 -26.55 0.0031
2023-11-09 2023-09-30 13F CYTOKINETICS COM NEW 23282W605 142,714 -32,789 4,204 0.0013
2023-08-10 2023-06-30 13F CYTOKINETICS COM NEW 23282W605 175,503 -50,356 -22.30 5,725 -27.97 0.0038
2023-05-11 2023-03-31 13F CYTOKINETICS COM NEW 23282W605 225,859 69,332 44.29 7,948 10.81 0.0056
2023-02-09 2022-12-31 13F CYTOKINETICS COM NEW 23282W605 156,527 -3,661 -2.29 7,172 -7.59 0.0057
2022-11-10 2022-09-30 13F CYTOKINETICS COM NEW 23282W605 160,188 24,108 17.72 7,761 45.15 0.0056
2022-08-10 2022-06-30 13F CYTOKINETICS COM NEW 23282W605 136,080 40,400 42.22 5,347 51.82 0.0040
2022-05-12 2022-03-31 13F CYTOKINETICS COM NEW 23282W605 95,680 -77,979 -44.90 3,522 -55.50 0.0021
2022-02-10 2021-12-31 13F CYTOKINETICS COM NEW 23282W605 173,659 60,249 53.12 7,915 95.29 0.0042
2021-11-10 2021-09-30 13F CYTOKINETICS COM NEW 23282W605 113,410 -128,425 -53.10 4,053 -15.32 0.0024
2021-08-10 2021-06-30 13F CYTOKINETICS COM NEW 23282W605 241,835 55,089 29.50 4,786 10.17 0.0029
2021-05-13 2021-03-31 13F CYTOKINETICS COM NEW 23282W605 186,746 164,502 739.53 4,344 840.26 0.0028
2021-02-11 2020-12-31 13F CYTOKINETICS COM NEW 23282W605 22,244 13,415 151.94 462 141.88 0.0003
2020-11-12 2020-09-30 13F CYTOKINETICS COM NEW 23282W605 8,829 -40,714 -82.18 191 -83.65 0.0001
2020-08-12 2020-06-30 13F CYTOKINETICS COM NEW 23282W605 49,543 7,941 19.09 1,168 138.37 0.0009
2020-05-12 2020-03-31 13F CYTOKINETICS COM NEW 23282W605 41,602 -2,133 -4.88 490 5.60 0.0004
2020-02-12 2019-12-31 13F CYTOKINETICS COM NEW 23282W605 43,735 -57,750 -56.90 464 -59.83 0.0003
2019-11-08 2019-09-30 13F CYTOKINETICS COM NEW 23282W605 101,485 21,993 27.67 1,155 29.19 0.0009
2019-08-12 2019-06-30 13F CYTOKINETICS COM NEW 23282W605 79,492 47,114 145.51 894 241.22 0.0007
2019-05-13 2019-03-31 13F CYTOKINETICS COM NEW 23282W605 32,378 -99,616 -75.47 262 -68.59 0.0003
2019-02-12 2018-12-31 13F CYTOKINETICS COM NEW 23282W605 131,994 100,664 321.30 834 169.90 0.0008
2018-11-13 2018-09-30 13F CYTOKINETICS COM NEW 23282W605 31,330 -91 -0.29 309 18.39 0.0003
2018-08-10 2018-06-30 13F CYTOKINETICS COM NEW 23282W605 31,421 -740,900 -95.93 261 -95.31 0.0002
2018-05-11 2018-03-31 13F CYTOKINETICS COM NEW 23282W605 772,321 -46,707 -5.70 5,560 -16.70 0.0046
2018-02-12 2017-12-31 13F CYTOKINETICS COM NEW 23282W605 819,028 30,321 3.84 6,675 -41.64 0.0054
2017-11-13 2017-09-30 13F CYTOKINETICS COM NEW 23282W605 788,707 -11,764 -1.47 11,437 18.08 0.0094
2017-08-11 2017-06-30 13F CYTOKINETICS COM NEW 23282W605 800,471 71,811 9.86 9,686 3.45 0.0087
2017-05-12 2017-03-31 13F CYTOKINETICS COM NEW 23282W605 728,660 -21,099 -2.81 9,363 2.78 0.0083
2017-02-10 2016-12-31 13F CYTOKINETICS COM NEW 23282W605 749,759 41,721 5.89 9,110 40.18 0.0082
2016-11-10 2016-09-30 13F CYTOKINETICS COM NEW 23282W605 708,038 -3,781 -0.53 6,499 -3.79 0.0061
2016-08-12 2016-06-30 13F CYTOKINETICS COM NEW 23282W605 711,819 -33,581 -4.51 6,755 28.54 0.0069
2016-05-13 2016-03-31 13F CYTOKINETICS COM NEW 23282W605 745,400 22,824 3.16 5,255 -30.47 0.0059
2016-02-12 2015-12-31 13F CYTOKINETICS COM NEW 23282W605 722,576 93,319 14.83 7,558 79.52 0.0075
2015-11-13 2015-09-30 13F CYTOKINETICS COM NEW 23282W605 629,257 619,298 6,218.48 4,210 6,183.58 0.0039
2015-08-13 2015-06-30 13F CYTOKINETICS COM NEW 23282W605 9,959 6,556 192.65 67 191.30 0.0001
2015-05-14 2015-03-31 13F CYTOKINETICS COM NEW 23282W605 3,403 -5,543 -61.96 23 -68.06 0.0000
2015-02-17 2014-12-31 13F CYTOKINETICS COM NEW 23282W605 8,946 4,505 101.44 72 350.00 0.0001
2014-11-14 2014-09-30 13F CYTOKINETICS COM NEW 23282W605 4,441 3,221 264.02 16 166.67 0.0000
2014-08-14 2014-06-30 13F CYTOKINETICS COM NEW 23282W605 1,220 -6,140 -83.42 6 -91.43 0.0000
2014-05-15 2014-03-31 13F CYTOKINETICS COM NEW 23282W605 7,360 -2,431 -24.83 70 11.11 0.0001
2014-02-14 2013-12-31 13F CYTOKINETICS COM NEW 23282W605 9,791 7,207 278.91 63 215.00 0.0001
2013-11-14 2013-09-30 13F CYTOKINETICS COM NEW 23282W605 2,584 -16,387 -86.38 20 -90.87 0.0000
2013-08-14 2013-06-30 13F CYTOKINETICS COM 23282W100 18,971 18,971 219 0.0002
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 CYTOKINETICS COM NEW Call 56,000 -56.04 3,691 -54.41 n/a n/a n/a
2026-02-13 2025-12-31 13F CYTOKINETICS COM NEW Call 127,400 399.61 8,095 477.73 n/a n/a n/a
2025-11-10 2025-09-30 13F CYTOKINETICS COM NEW Call 25,500 -16.39 1,401 39.13 n/a n/a n/a
2025-08-11 2025-06-30 13F CYTOKINETICS COM NEW Call 30,500 -49.59 1,008 -58.58 n/a n/a n/a
2025-05-12 2025-03-31 13F CYTOKINETICS COM NEW Call 60,500 -44.34 2,431 -52.45 n/a n/a n/a
2025-02-12 2024-12-31 13F CYTOKINETICS COM NEW Call 108,700 -47.08 5,113 -52.85 n/a n/a n/a
2024-11-12 2024-09-30 13F CYTOKINETICS COM NEW Call 205,400 71.60 10,845 67.23 n/a n/a n/a
2024-08-12 2024-06-30 13F CYTOKINETICS COM NEW Call 119,700 6,485 n/a n/a n/a
2024-05-10 2024-03-31 13F CYTOKINETICS COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-02-09 2023-12-31 13F CYTOKINETICS COM NEW Call 180,900 15,103 n/a n/a n/a
2023-12-06 2023-09-30 13F/A CYTOKINETICS COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-11-09 2023-09-30 13F CYTOKINETICS COM NEW Call 0 0 n/a n/a n/a
2023-08-10 2023-06-30 13F CYTOKINETICS COM NEW Call 55,000 -34.83 1,794 -39.60 n/a n/a n/a
2023-05-11 2023-03-31 13F CYTOKINETICS COM NEW Call 84,400 181.33 2,970 116.16 n/a n/a n/a
2023-02-09 2022-12-31 13F CYTOKINETICS COM NEW Call 30,000 1,375 n/a n/a n/a
2022-11-10 2022-09-30 13F CYTOKINETICS COM NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-08-10 2022-06-30 13F CYTOKINETICS COM NEW Call 20,000 786 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 CYTOKINETICS COM NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-13 2025-12-31 13F CYTOKINETICS COM NEW Put 60,000 140.00 3,812 177.44 n/a n/a n/a
2025-11-10 2025-09-30 13F CYTOKINETICS COM NEW Put 25,000 -16.67 1,374 38.65 n/a n/a n/a
2025-08-11 2025-06-30 13F CYTOKINETICS COM NEW Put 30,000 -68.59 991 -74.18 n/a n/a n/a
2025-05-12 2025-03-31 13F CYTOKINETICS COM NEW Put 95,500 -1.34 3,838 -15.70 n/a n/a n/a
2025-02-12 2024-12-31 13F CYTOKINETICS COM NEW Put 96,800 -0.72 4,553 -11.56 n/a n/a n/a
2024-11-12 2024-09-30 13F CYTOKINETICS COM NEW Put 97,500 5,148 n/a n/a n/a
2024-05-10 2024-03-31 13F CYTOKINETICS COM NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-02-09 2023-12-31 13F CYTOKINETICS COM NEW Put 30,000 2,505 n/a n/a n/a
2023-12-06 2023-09-30 13F/A CYTOKINETICS COM NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-11-09 2023-09-30 13F CYTOKINETICS COM NEW Put 0 0 n/a n/a n/a
2023-08-10 2023-06-30 13F CYTOKINETICS COM NEW Put 55,000 -34.83 1,794 -39.60 n/a n/a n/a
2023-05-11 2023-03-31 13F CYTOKINETICS COM NEW Put 84,400 181.33 2,970 116.16 n/a n/a n/a
2023-02-09 2022-12-31 13F CYTOKINETICS COM NEW Put 30,000 1,375 n/a n/a n/a
2022-11-10 2022-09-30 13F CYTOKINETICS COM NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-08-10 2022-06-30 13F CYTOKINETICS COM NEW Put 20,000 786 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.