Simplex Trading
CYTK icon

Simplex Trading’s Cytokinetics CYTK Stock Holding History

Simplex Trading’s Portfolio CYTK Stock Details CYTK Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$8.79M Buy
133,300
+24,200
+22% +$1.54M 0.01% 753
2025
Q4 		$6.93M Sell
109,100
-8,000
-7% -$498K ﹤0.01% 1071
2025
Q3 		$6.43M Sell
117,100
-46,100
-28% -$1.9M ﹤0.01% 1256
2025
Q2 		$5.39M Buy
163,200
+25,400
+18% +$883K ﹤0.01% 1283
2025
Q1 		$5.54M Sell
137,800
-174,100
-56% -$8M ﹤0.01% 1247
2024
Q4 		$14.7M Buy
311,900
+101,000
+48% +$5.25M 0.01% 805
2024
Q3 		$11.1M Buy
210,900
+56,000
+36% +$3.12M 0.01% 975
2024
Q2 		$8.39M Sell
154,900
-262,100
-63% -$15.8M 0.01% 1128
2024
Q1 		$29.2M Sell
417,000
-313,600
-43% -$24.3M 0.02% 516
2023
Q4 		$61M Buy
730,600
+631,100
+634% +$22.9M 0.04% 283
2023
Q3 		$2.93M Buy
99,500
+88,400
+796% +$2.94M ﹤0.01% 1758
2023
Q2 		$362K Buy
11,100
+6,500
+141% +$240K ﹤0.01% 3639
2023
Q1 		$161K Sell
4,600
-20,200
-81% -$824K ﹤0.01% 4578
2022
Q4 		$1.14M Sell
24,800
-30,200
-55% -$1.3M ﹤0.01% 2342
2022
Q3 		$2.66M Buy
55,000
+1,600
+3% +$77K ﹤0.01% 1717
2022
Q2 		$2.1M Buy
53,400
+31,000
+138% +$1.25M ﹤0.01% 1816
2022
Q1 		$824K Buy
22,400
+19,700
+730% +$700K ﹤0.01% 3146
2021
Q4 		$123K Buy
2,700
+200
+8% +$7.72K ﹤0.01% 5921
2021
Q3 		$52K Hold
2,500
– – ﹤0.01% 7466
2021
Q2 		$49K Buy
+2,500
New +$58.7K ﹤0.01% 7657
2021
Q1 		– Sell
-726
Closed -$1.51M – 9013
2020
Q4 		$1.51M Buy
726
+536
+282% +$9.8K ﹤0.01% 2064
2020
Q3 		$411K Buy
190
+85
+81% +$1.99K ﹤0.01% 3230
2020
Q2 		$247K Sell
105
-97
-48% -$1.82K ﹤0.01% 3760
2020
Q1 		$238K Sell
202
-14
-6% -$179 ﹤0.01% 3396
2019
Q4 		$229K Buy
216
+170
+370% +$1.75K ﹤0.01% 3603
2019
Q3 		$52K Buy
46
+21
+84% +$264 ﹤0.01% 4986
2019
Q2 		$28K Buy
25
+18
+257% +$174 ﹤0.01% 5326
2019
Q1 		$5K Sell
7
-23
-77% -$169 ﹤0.01% 6462
2018
Q4 		$18K Sell
30
-4
-12% -$29 ﹤0.01% 5411
2018
Q3 		$33K Buy
34
+10
+42% +$80 ﹤0.01% 5547
2018
Q2 		$19K Buy
+24
New +$200 ﹤0.01% 5893
2018
Q1 		– Sell
-99
Closed -$6K – 6263
2017
Q4 		$6K Sell
99
-344
-78% -$3.9K ﹤0.01% 4308
2017
Q3 		$114K Buy
443
+112
+34% +$1.53K ﹤0.01% 1610
2017
Q2 		$51K Buy
331
+275
+491% +$3.82K ﹤0.01% 2372
2017
Q1 		$15K Buy
56
+24
+75% +$281 ﹤0.01% 3548
2016
Q4 		$4K Sell
32
-181
-85% -$1.92K ﹤0.01% 4506
2016
Q3 		$6K Buy
213
+195
+1,083% +$2.04K ﹤0.01% 4087
2016
Q2 		$1K Sell
18
-4
-18% -$33 ﹤0.01% 5247
2016
Q1 		$4K Buy
22
+2
+10% +$15 ﹤0.01% 4231
2015
Q4 		$12K Sell
20
-28
-58% -$275 ﹤0.01% 3137
2015
Q3 		$6K Buy
+48
New +$328 ﹤0.01% 3825
2015
Q2 		– Sell
-37
Closed -$3K – 5291
2015
Q1 		$3K Sell
37
-47
-56% -$351 ﹤0.01% 3828
2014
Q4 		$31K Buy
+84
New +$360 ﹤0.01% 1714

Other funds holding CYTK

T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
ACA
Avoro Capital Advisors New York $10.2B AUM 149.19% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return

Simplex Trading's CYTK Position: Q4 2025 in Review

Simplex Trading sold out of Cytokinetics (CYTK) in Q4 2025, closing a stake of 41,004 shares — an estimated $2.55M sold.

Simplex Trading first reported a position in CYTK in Q1 2015 and held it in 28 quarters. The position peaked at $12.5M in Q1 2024. 430 funds tracked by Wall St. Rank hold CYTK as of Q4 2025.

  • Simplex Trading reported no remaining Cytokinetics position as of Q4 2025 after selling out during the quarter.
  • Simplex Trading sold 41,004 Cytokinetics shares in Q4 2025, an estimated $2.55M.
  • Simplex Trading first reported a position in Cytokinetics in Q1 2015 and held it in 28 quarters.
  • Simplex Trading's Cytokinetics position peaked at $12.5M in Q1 2024.
  • 430 funds tracked by Wall St. Rank held Cytokinetics as of Q4 2025.

Based on Simplex Trading's 13F filing for Q4 2025, filed 11 Feb 2026.