Key facts
- This page summarizes Sung Lee's Form 4 filing for CYTOKINETICS INC (CYTK).
- 11 reported transactions and 5 derivative rows are listed below.
- Accepted by SEC: 29 Jun 2026, 17:23.
Sung Lee - 29 Jun 2026 Form 4 Insider Report for CYTOKINETICS INC (CYTK)
- Reporting relationship
- EVP, Chief Financial Officer
- Issuer ticker
- CYTK
- Reported as of
- 29 Jun 2026
- Net transaction value
- -$266,390
- SEC form
- 4
- Accepted by SEC
- 29 Jun 2026, 17:23:39 UTC
- Prior SEC filing
- 29 Jun 2026
- Next SEC filing
- 02 Jul 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ John O. Faurescu, attorney-in-fact for Mr. Lee
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Sung Lee filed Form 4 for CYTOKINETICS INC (CYTK) on 29 Jun 2026.
Change
- Previous filing in this sequence was filed on 29 Jun 2026.
- Current net transaction value: -$266,390.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001793200
Primary reporting owner
Lee Sung
- Relationship
- EVP, Chief Financial Officer
- Address
- 350 OYSTER POINT BLVD, SOUTH SAN FRANCISCO
- Signature
- /s/ John O. Faurescu, attorney-in-fact for Mr. Lee
- Signature date
- 29 Jun 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
CYTK
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +188
- Change %
- +0.3%
- Price
- $44.36*
- Shares after
- 63,409
- Date
- 29 Jun 2026
- Ownership
- Direct
CYTK
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +822
- Change %
- +1.3%
- Price
- $44.36*
- Shares after
- 64,231
- Date
- 29 Jun 2026
- Ownership
- Direct
CYTK
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +1,113
- Change %
- +1.7%
- Price
- $48.51*
- Shares after
- 65,344
- Date
- 29 Jun 2026
- Ownership
- Direct
CYTK
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +188
- Change %
- +0.29%
- Price
- $44.36*
- Shares after
- 65,532
- Date
- 29 Jun 2026
- Ownership
- Direct
CYTK
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +823
- Change %
- +1.3%
- Price
- $44.36*
- Shares after
- 66,355
- Date
- 29 Jun 2026
- Ownership
- Direct
CYTK
transaction
Common Stock
Sale
- Transaction value
- $266,390
- Shares
- -3,134
- Change %
- -4.7%
- Price
- $85.00
- Shares after
- 63,221
- Date
- 29 Jun 2026
- Ownership
- Direct
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
CYTK
transaction
Derivative
Incentive Stock Option (Right to Buy)
Options Exercise
- Transaction value
- Shares
- -188
- Change %
- -2.1%
- Price
- $0.000000*
- Shares after
- 8,828
- Date
- 29 Jun 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 188
- Exercise price
- $44.36
CYTK
transaction
Derivative
Non-Qualified Stock Option (Right to Buy)
Options Exercise
- Transaction value
- Shares
- -822
- Change %
- -2%
- Price
- $0.000000*
- Shares after
- 40,504
- Date
- 29 Jun 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 822
- Exercise price
- $44.36
CYTK
transaction
Derivative
Non-Qualified Stock Option (Right to Buy)
Options Exercise
- Transaction value
- Shares
- -1,113
- Change %
- -2.1%
- Price
- $0.000000*
- Shares after
- 52,304
- Date
- 29 Jun 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 1,113
- Exercise price
- $48.51
CYTK
transaction
Derivative
Incentive Stock Option (Right to Buy)
Options Exercise
- Transaction value
- Shares
- -188
- Change %
- -2.1%
- Price
- $0.000000*
- Shares after
- 8,640
- Date
- 29 Jun 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 188
- Exercise price
- $44.36
CYTK
transaction
Derivative
Non-Qualified Stock Option (Right to Buy)
Options Exercise
- Transaction value
- Shares
- -823
- Change %
- -2%
- Price
- $0.000000*
- Shares after
- 39,681
- Date
- 29 Jun 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 823
- Exercise price
- $44.36
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Rule 10b5-1 trading plan
These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.
Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).