CYTOKINETICS INC

Ticker: CYTK CUSIP: 23282W605 Class: EQTY

MASSACHUSETTS FINANCIAL SERVICES CO /MA/'s Holding History (CIK: 0000912938)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 327,202 Value ($000) $20,790 Avg Close $62.21 Range $53.61 - $70.98

Q3 2025

Shares 496,673 Value ($000) $27,297 Avg Close $41.20 Range $32.66 - $55.92

Q2 2025

Shares 497,602 Value ($000) $16,441 Avg Close $34.78 Range $29.31 - $43.69

Q1 2025

Shares 319,533 Value ($000) $12,842 Avg Close $45.96 Range $39.81 - $52.80

Q4 2024

Shares 319,281 Value ($000) $15,019 Avg Close $51.94 Range $45.66 - $59.39

Q3 2024

Shares 344,448 Value ($000) $18,187 Avg Close $55.74 Range $51.05 - $61.38

Q2 2024

Shares 276,067 Value ($000) $14,957 Avg Close $60.36 Range $46.25 - $75.71

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	327,202	$20,790	$62.21	$53.61 - $70.98
Q3 2025	496,673	$27,297	$41.20	$32.66 - $55.92
Q2 2025	497,602	$16,441	$34.78	$29.31 - $43.69
Q1 2025	319,533	$12,842	$45.96	$39.81 - $52.80
Q4 2024	319,281	$15,019	$51.94	$45.66 - $59.39
Q3 2024	344,448	$18,187	$55.74	$51.05 - $61.38
Q2 2024	276,067	$14,957	$60.36	$46.25 - $75.71