Security key
23282W605
- Security type / class
- Equity / COMMON STOCK
- Total 13F shares
- 139,445,035
- Total 13F value
- $8,860,439,654
- Share change
- -3,232,895
- Put/Call ratio
- 26%
- SEC-reported price per share
- $63.54
- Number of holders
- 431
- Value change
- -$178,120,443
- Number of buys
- 225
- Number of sells
- 183
- Shares outstanding
- 134,578,967
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2025
Institutions
431
Top holders
10
CYTK full security history
Ownership snapshot
Full 13F holder table
CYTOKINETICS INC SEC filings
CYTOKINETICS INC company facts
Broader feeds
Ownership snapshot
Top reported holders of CYTK - CYTOKINETICS INC - COMMON STOCK (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
T. Rowe Price Investment ...
Disclosed value leader
T. Rowe Price Investment ...
Comparable rows
15/15
Latest evidence
31 Dec 2025
13D/G
13F
Lead comparable stake: 14%
13D/G row: T. Rowe Price Investment Management, Inc.
Showing 1-6 of 15 holder rows.
Quick read
T. Rowe Price Investment Management, Inc. leads the comparable SEC ownership view at 14%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens T. Rowe Price Investment Management, Inc.'s linked filing trail.
Comparable ownership
Top 5
T. Rowe Price Investment Manageme...
14%
STATE STREET CORP
4.7%
BlackRock, Inc.
12%
FMR LLC
9.7%
VANGUARD GROUP INC
8.8%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| T. Rowe Price Investment Management, Inc. |
13D/G
13F
Company
|
14%
|
$1,145,186,286
17,716,372 shares
|
-$89,267,905 | 31 Dec 2025 |
| STATE STREET CORP |
13F
13D/G
Company · STATE STREET CORPORATION
|
4.7%
from 13D/G
|
$308,728,677
5,617,334 shares
|
— | 30 Sep 2025 |
| BlackRock, Inc. |
13F
Company
|
12%
|
$853,295,069
15,525,747 shares
|
— | 30 Sep 2025 |
| FMR LLC |
13F
Company
|
9.7%
|
$719,516,917
13,091,647 shares
|
— | 30 Sep 2025 |
| VANGUARD GROUP INC |
13F
Company
|
8.8%
|
$651,649,453
11,856,795 shares
|
— | 30 Sep 2025 |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
Company
|
5.5%
|
$407,174,511
7,408,561 shares
|
— | 30 Sep 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
431
Shares
139,445,035
Rows available
431
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
379
Q4 2025 holders
431
Holder diff
52
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|