CYTOKINETICS INC (CYTK) Institutional Shareholders
CYTOKINETICS INC (CYTK) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $11.75B in CYTK holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of CYTK tracked by InsiderSet, reporting ownership valued at approximately $1.71B in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $1.49B, representing an estimated loss of -12.98% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 49% of the total disclosed CYTK value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Wellington Management Group Llp, Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in CYTOKINETICS INC (CYTK).
This page ranks the largest institutional CYTK shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
469
Total Reported Value
$11.75B
Largest Holder
Blackrock, Inc.
Largest Position
$1.71B
Insider Transactions (90d)
45
Latest Filing Quarter
Q2 2026
New Institutional Positions
67
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.03% | 20,094,362 | $1,711,838,738 | $1,489,595,055 | -$222,243,683 | -12.98% | |
| Wellington Management Group Llp | 0.10% | 6,931,770 | $590,517,486 | $513,852,110 | -$76,665,376 | -12.98% | |
| Vanguard Portfolio Management Llc | 0.03% | 6,711,799 | $571,778,157 | $497,545,660 | -$74,232,497 | -12.98% | |
| State Street Corp | 0.02% | 6,494,233 | $553,243,709 | $481,417,492 | -$71,826,217 | -12.98% | |
| Vanguard Capital Management Llc | 0.01% | 6,117,515 | $521,151,103 | $453,491,387 | -$67,659,716 | -12.98% | |
| Fmr Llc | 0.02% | 5,031,782 | $428,657,534 | $373,006,000 | -$55,651,534 | -12.98% | |
| Avoro Capital Advisors Llc | 3.82% | 4,999,999 | $425,949,915 | $370,649,926 | -$55,299,989 | -12.98% | |
| Bank Of America Corp | 0.03% | 4,635,709 | $394,916,049 | $343,645,108 | -$51,270,941 | -12.98% | |
| Geode Capital Management, Llc | 0.02% | 3,712,501 | $316,325,896 | $275,207,699 | -$41,118,197 | -13.00% | |
| Rtw Investments, Lp | 2.08% | 2,862,003 | $243,814,036 | $212,160,282 | -$31,653,754 | -12.98% | |
| Polar Capital Holdings Plc | 0.54% | 2,253,649 | $191,988,358 | $167,063,000 | -$24,925,358 | -12.98% | |
| Goldman Sachs Group Inc | 0.02% | 1,761,588 | $150,069,725 | $130,586,518 | -$19,483,207 | -12.98% | |
| Capital Research Global Investors | 0.02% | 1,686,625 | $143,683,584 | $125,029,511 | -$18,654,073 | -12.98% | |
| Northern Trust Corp | 0.02% | 1,647,345 | $140,337,319 | $122,117,685 | -$18,219,634 | -12.98% | |
| Jpmorgan Chase & Co | 0.01% | 1,588,895 | $139,150,046 | $117,784,786 | -$21,365,260 | -15.35% | |
| William Blair Investment Management, Llc | 0.41% | 1,603,442 | $136,597,224 | $118,863,155 | -$17,734,069 | -12.98% | |
| Integral Health Asset Management, Llc | 5.59% | 1,600,000 | $136,304,000 | $118,608,000 | -$17,696,000 | -12.98% | |
| Point72 Asset Management, L.P. | 0.21% | 1,587,712 | $135,257,185 | $117,697,091 | -$17,560,094 | -12.98% | |
| Charles Schwab Investment Management Inc | 0.02% | 1,565,781 | $133,388,883 | $116,071,346 | -$17,317,537 | -12.98% | |
| Sixth Street Partners Management Company, L.P. | 0.02% | 1,565,781 | $133,388,883 | $116,071,346 | -$17,317,537 | -12.98% | |
| Susquehanna International Group, Llp | 0.12% | 1,549,458 | $131,998,327 | $114,861,322 | -$17,137,005 | -12.98% | |
| Morgan Stanley | 0.01% | 1,510,318 | $128,664,004 | $111,959,873 | -$16,704,131 | -12.98% | |
| Principal Financial Group Inc | 0.05% | 1,311,664 | $111,740,656 | $97,233,652 | -$14,507,004 | -12.98% | |
| Capital International Investors | 0.02% | 1,305,848 | $111,245,191 | $96,802,512 | -$14,442,679 | -12.98% | |
| Invesco Ltd. | 0.01% | 1,235,323 | $105,237,167 | $91,574,494 | -$13,662,673 | -12.98% | |
| Armistice Capital, Llc | 2.83% | 1,201,342 | $102,342,325 | $89,055,482 | -$13,286,843 | -12.98% | |
| Ubs Group Ag | 0.02% | 1,171,287 | $99,781,940 | $86,827,505 | -$12,954,435 | -12.98% | |
| Pictet Asset Management Holding Sa | 0.09% | 1,160,463 | $99,038,455 | $86,025,122 | -$13,013,333 | -13.14% | |
| Frazier Life Sciences Management, L.P. | 2.15% | 1,159,879 | $98,810,092 | $85,981,830 | -$12,828,262 | -12.98% | |
| Bank Of New York Mellon Corp | 0.02% | 1,150,697 | $98,027,901 | $85,301,169 | -$12,726,732 | -12.98% | |
| Holocene Advisors, Lp | 0.22% | 1,144,579 | $97,506,685 | $84,847,641 | -$12,659,044 | -12.98% | |
| Woodline Partners Lp | 0.29% | 1,100,708 | $93,769,315 | $81,595,484 | -$12,173,831 | -12.98% | |
| D. E. Shaw & Co., Inc. | 0.06% | 1,048,103 | $89,287,894 | $77,695,875 | -$11,592,019 | -12.98% | |
| Norges Bank | 0.01% | 1,015,522 | $86,512,319 | $75,280,646 | -$11,231,673 | -12.98% | |
| Royalty Pharma Sub-Manager, Llc | 34.52% | 980,392 | $83,519,594 | $72,676,459 | -$10,843,135 | -12.98% | |
| Nomura Asset Management International Inc. | 0.12% | 961,815 | $81,937,000 | $71,299,346 | -$10,637,654 | -12.98% | |
| Vanguard Fiduciary Trust Co | 0.02% | 906,423 | $77,218,175 | $67,193,137 | -$10,025,038 | -12.98% | |
| Bnp Paribas Asset Management Holding S.A. | 0.07% | 827,810 | $70,521,134 | $61,365,555 | -$9,155,579 | -12.98% | |
| Melqart Asset Management (Uk) Ltd | 6.22% | 767,525 | $65,385,455 | $56,896,628 | -$8,488,827 | -12.98% | |
| Siren, L.L.C. | 1.31% | 758,952 | $64,655,121 | $56,261,112 | -$8,394,009 | -12.98% | |
| Fisher Asset Management, Llc | 0.02% | 743,697 | $63,355,547 | $55,130,259 | -$8,225,288 | -12.98% | |
| Foresite Capital Management Iv, Llc | 20.98% | 714,695 | $60,884,867 | $52,980,340 | -$7,904,527 | -12.98% | |
| Balyasny Asset Management L.P. | 0.11% | 711,676 | $60,627,678 | $52,756,542 | -$7,871,136 | -12.98% | |
| Deep Track Capital, Lp | 0.88% | 700,000 | $59,633,000 | $51,891,000 | -$7,742,000 | -12.98% | |
| Bnp Paribas Financial Markets | 0.03% | 689,077 | $58,702,470 | $51,081,278 | -$7,621,192 | -12.98% | |
| Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A. | 3.08% | 660,310 | $56,251,809 | $48,948,780 | -$7,303,029 | -12.98% | |
| Citadel Advisors Llc | 0.03% | 640,945 | $54,602,105 | $47,513,253 | -$7,088,852 | -12.98% | |
| Qube Research & Technologies Ltd | 0.05% | 572,535 | $48,774,257 | $42,442,020 | -$6,332,237 | -12.98% | |
| Brown Advisory Inc | 0.08% | 570,664 | $48,614,900 | $42,303,322 | -$6,311,578 | -12.98% | |
| Eventide Asset Management, Llc | 0.64% | 564,398 | $48,081,832 | $41,838,824 | -$6,243,008 | -12.98% |
Frequently asked questions about CYTK
Who owns the most CYTK stock?
The largest holders of CYTK are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for CYTOKINETICS INC (CYTK).
Is CYTK widely held by superinvestors?
Many widely followed stocks like CYTK appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly CYTK is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.