Position in CYTK
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$18,740,692
+$16,116,354 QoQ
Shares Held
219,987
+452.5% QoQ
Ownership
0.158%
of shares outstanding
% of Portfolio
2.73%
of 13F equity value
Holder Rank
#91
of 477 holders
Holding Since
Sep 2023
12 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in CYTK Over Time
Shares Held
Position Value (USD)
Derivatives in CYTK
reported options exposure · as of Jun 30, 2026CallValue
$8,519,000
CallShares
100,000
PutValue
$0
PutShares
0
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Biotechnology
Healthcare · as of Jun 30, 2026SPHERA FUNDS MANAGEMENT LTD. holds $446,413,848 across 71 Biotechnology names. CYTK ranks #5 (4.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | MLYS |
Mineralys Therapeutics, Inc.
|
1,469,971 | $39,659,817 | |
| 2 | SNDX |
Syndax Pharmaceuticals Inc
|
1,014,606 | $22,179,287 | |
| 3 | RARE |
Ultragenyx Pharmaceutical Inc.
|
588,494 | $19,649,814 | |
| 4 | BMRN |
Biomarin Pharmaceutical Inc
|
328,550 | $18,799,631 | |
| 5 | CYTK |
Cytokinetics Inc
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|
219,987 | $18,740,692 | |
| 6 | BBIO |
BridgeBio Pharma, Inc.
|
245,346 | $18,273,370 | |
| 7 | COGT |
Cogent Biosciences, Inc.
|
459,340 | $17,776,458 | |
| 8 | INSM |
INSMED Inc
|
118,800 | $12,666,456 |
All Filings in CYTK
Export CSV
18 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $8,519,000 | 100,000 | Call | Defined | 2026-08-14 | |
| 2026-06-30 | $18,740,692 | 219,987 | Shares | Defined | 2026-08-14 | |
| 2026-03-31 | $2,624,338 | 39,817 | Shares | Defined | 2026-05-15 | |
| 2026-03-31 | $17,090,463 | 259,300 | Call | Defined | 2026-05-15 | |
| 2025-12-31 | $5,827,698 | 91,717 | Shares | Defined | 2026-02-17 | |
| 2025-09-30 | $8,876,974 | 161,517 | Shares | Defined | 2025-11-14 | |
| 2025-06-30 | $10,794,762 | 326,718 | Shares | Defined | 2025-08-14 | |
| 2025-03-31 | $5,825,982 | 144,961 | Shares | Defined | 2025-05-15 | |
| 2024-12-31 | $2,352,000 | 50,000 | Call | Defined | 2025-02-14 | |
| 2024-12-31 | $7,198,107 | 153,021 | Shares | Defined | 2025-02-14 | |
| 2024-09-30 | $11,881,108 | 225,021 | Shares | Defined | 2024-11-14 | |
| 2024-09-30 | $2,640,000 | 50,000 | Call | Defined | 2024-11-14 | |
| 2024-06-30 | $20,855,182 | 384,924 | Shares | Defined | 2024-08-14 | |
| 2024-03-31 | $19,747,953 | 281,671 | Shares | Defined | 2024-05-15 | |
| 2023-12-31 | $2,988,942 | 35,800 | Call | Defined | 2024-02-15 | |
| 2023-12-31 | $18,686,731 | 223,820 | Shares | Defined | 2024-02-15 | |
| 2023-09-30 | $1,914,900 | 65,000 | Call | Defined | 2023-11-14 | |
| 2023-09-30 | $6,891,666 | 233,933 | Shares | Defined | 2023-11-14 | |
| No filing history on record for this holder in this stock. | ||||||