Latest Period
Q2 2026
Security Snapshot
CYTOKINETICS INC - Common Stock (CYTK) Institutional Ownership
CUSIP: 23282W605
13F Institutional Holders and Ownership History from Q1 2014 to Q2 2026
Institutions Reporting
478
Shares (Excl. Options)
160,363,851
Price
$85.19
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- Security type / class
- Equity / Common Stock
- Symbol
- CYTK on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 160,363,851
- Total 13F value
- $13,655,261,620
- Portfolio coverage rank
- 0.01%
- Share change
- +14,495,237
- Value change
- +$1,328,387,766
- Number of holders
- 478
- Shares outstanding
- 139,543,608
- SEC-reported price per share
- $82.19
- Insider filing price
- $82.19
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- CYTK - CYTOKINETICS INC - Common Stock is tracked under CUSIP 23282W605.
- 478 institutions reported positions in Q2 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 440 to 478 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $9,624,344,584 to $13,655,261,620.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 478 institutions filings for Q2 2026.
Security key
23282W605
Latest holder period
Q2 2026
13F holders
478
13D/G owners
5
CIK / CUSIP context first
Open Q2 2026 holders
CYTK full holder history
CYTOKINETICS INC SEC filings
CYTOKINETICS INC company facts
CYTOKINETICS INC insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 23282W605:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
CYTK
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| T. Rowe Price Investment Management, Inc. | 14% | -9.4% | $1,145,186,286 | -$89,267,905 | 17,716,372 | -7.2% | T. Rowe Price Investment Management, Inc. | 31 Dec 2025 |
| WELLINGTON MANAGEMENT GROUP LLP | 5.1% | $608,978,073 | 7,116,724 | Wellington Management Group LLP | 30 Jun 2026 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 5.2% | $423,276,788 | 6,422,042 | Vanguard Capital Management | 31 Mar 2026 | |||
| STATE STREET CORP | 4.7% | $308,728,677 | 5,617,334 | STATE STREET CORPORATION | 30 Sep 2025 | |||
| FMR LLC | 3.9% | -57% | $447,127,030 | -$501,481,150 | 5,248,580 | -53% | FMR LLC | 30 Jun 2026 |
As of 30 Jun 2026, 478 institutional investors reported holding 160,363,851 shares of CYTOKINETICS INC - Common Stock (CYTK). This represents 115% of the company’s total 139,543,608 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
78%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 14% | 20,094,362 | +21% | 0.03% | $1,711,838,738 |
| T. Rowe Price Investment Management, Inc. | 13% | 18,718,498 | +6.8% | 1% | $1,594,629,000 |
| WELLINGTON MANAGEMENT GROUP LLP | 5% | 6,931,770 | -13% | 0.1% | $590,517,486 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4.8% | 6,711,799 | +15% | 0.03% | $571,778,157 |
| STATE STREET CORP | 4.7% | 6,494,233 | +13% | 0.02% | $553,243,709 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.4% | 6,117,515 | +11% | 0.01% | $521,151,103 |
| FMR LLC | 3.6% | 5,031,782 | -53% | 0.02% | $428,657,534 |
| Avoro Capital Advisors LLC | 3.6% | 4,999,999 | +50% | 3.8% | $425,949,915 |
| BANK OF AMERICA CORP /DE/ | 3.3% | 4,635,709 | +48% | 0.03% | $394,916,049 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.7% | 3,712,501 | +15% | 0.02% | $316,325,896 |
| RTW INVESTMENTS, LP | 2.1% | 2,862,003 | +5.2% | 2.1% | $243,814,036 |
| Polar Capital Holdings Plc | 1.6% | 2,253,649 | +36% | 0.54% | $191,988,358 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.4% | 1,958,946 | +24% | 0.02% | $166,884,000 |
| GOLDMAN SACHS GROUP INC | 1.3% | 1,761,588 | -20% | 0.02% | $150,069,725 |
| Capital Research Global Investors | 1.2% | 1,686,625 | +119% | 0.02% | $143,683,584 |
| NORTHERN TRUST CORP | 1.2% | 1,647,345 | +14% | 0.02% | $140,337,319 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 1.1% | 1,603,442 | +47% | 0.41% | $136,597,224 |
| Integral Health Asset Management, LLC | 1.1% | 1,600,000 | 0% | 5.6% | $136,304,000 |
| JPMORGAN CHASE & CO | 1.1% | 1,588,895 | +76% | 0.01% | $139,150,046 |
| Point72 Asset Management, L.P. | 1.1% | 1,587,712 | +154% | 0.21% | $135,257,185 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.1% | 1,565,781 | +12% | 0.02% | $133,388,883 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1.1% | 1,549,458 | +72% | 0.12% | $131,998,327 |
| MORGAN STANLEY | 1.1% | 1,510,318 | +0.35% | 0.01% | $128,664,004 |
| PRINCIPAL FINANCIAL GROUP INC | 0.94% | 1,311,664 | +20% | 0.05% | $111,740,656 |
| Capital International Investors | 0.94% | 1,305,848 | -2.5% | 0.02% | $111,245,191 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
50
Latest
Q2 2026
Rows shown
1-25 of 50
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 160,363,851 | $13,655,261,620 | +$1,328,387,766 | $85.19 | 478 |
| 2026 Q1 | 146,085,811 | $9,624,344,584 | +$408,684,172 | $65.91 | 440 |
| 2025 Q4 | 139,445,035 | $8,860,439,654 | -$178,120,443 | $63.54 | 431 |
| 2025 Q3 | 140,922,555 | $7,744,502,918 | +$248,284,955 | $54.96 | 379 |
| 2025 Q2 | 137,672,960 | $4,548,776,123 | +$22,757,186 | $33.04 | 308 |
| 2025 Q1 | 134,841,578 | $5,424,137,644 | +$124,956,259 | $40.19 | 352 |
| 2024 Q4 | 131,310,237 | $6,182,701,180 | -$305,419,938 | $47.04 | 342 |
| 2024 Q3 | 135,965,538 | $7,179,495,863 | -$22,095,980 | $52.80 | 343 |
| 2024 Q2 | 135,538,659 | $7,341,546,249 | +$905,298,022 | $54.18 | 341 |
| 2024 Q1 | 117,698,153 | $8,252,737,252 | +$191,436,420 | $70.11 | 385 |
| 2023 Q4 | 114,281,648 | $9,541,763,681 | +$330,415,688 | $83.49 | 344 |
| 2023 Q3 | 109,279,375 | $3,219,564,491 | +$24,845,219 | $29.46 | 248 |
| 2023 Q2 | 108,724,328 | $3,548,383,679 | -$11,513,808 | $32.62 | 252 |
| 2023 Q1 | 108,867,212 | $3,829,923,005 | +$81,444,143 | $35.19 | 259 |
| 2022 Q4 | 106,503,991 | $4,877,881,469 | +$56,105,064 | $45.82 | 271 |
| 2022 Q3 | 104,802,748 | $5,076,619,614 | -$48,250,542 | $48.45 | 271 |
| 2022 Q2 | 105,856,945 | $4,159,716,153 | +$425,134,262 | $39.29 | 255 |
| 2022 Q1 | 95,536,900 | $3,516,647,768 | +$153,742,395 | $36.81 | 233 |
| 2021 Q4 | 91,314,688 | $4,159,253,639 | +$41,291,377 | $45.58 | 244 |
| 2021 Q3 | 90,207,271 | $3,220,707,699 | +$496,552,275 | $35.74 | 208 |
| 2021 Q2 | 75,530,208 | $1,494,840,686 | +$7,258,934 | $19.79 | 184 |
| 2021 Q1 | 74,824,822 | $1,739,406,944 | +$58,909,832 | $23.26 | 185 |
| 2020 Q4 | 72,927,397 | $1,515,101,565 | +$2,994,280 | $20.78 | 174 |
| 2020 Q3 | 68,793,341 | $1,486,919,340 | +$223,796,678 | $21.65 | 176 |
| 2020 Q2 | 57,902,469 | $1,364,739,639 | +$106,180,554 | $23.57 | 155 |