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Insider / CYTOKINETICS INC

Blum Robert I

President & CEO at CYTOKINETICS INC

Company
CYTOKINETICS INC
Ticker
CYTK
First filing on record
October 1, 2025
Latest trade on record
October 12, 2026
SEC filings
EDGAR ↗

Blum Robert I, President & CEO at CYTOKINETICS INC, has disclosed 52 transactions in CYTK since October 1, 2025: 0 purchases (0 open-market buys) and 25 sales, worth about $21.7M at the reported prices. The latest was filed October 13, 2026, 1 day after the trade; 3 filings were late against the 2-business-day Form 4 deadline.

Last updated October 13, 2026 · Source: SEC EDGAR Form 4 filings

Transactions
52
Open-market buys
0
Sales
25
Avg. disclosure lag
1.0d

Trading in charts

Trade timeline

When does this person trade, how big, and in which direction? Every trade in the last 12 months.

Bought (above the line)Sold (below the line)Other transaction
Oct 25NovDecJan 26FebMarAprMayJunJulAugSep
Oct 25NovDecJan 26FebMarAprMayJunJulAugSep

In the last 12 months Blum Robert I made no purchases and 23 sales worth $20M, plus 27 other transactions. Dot size is the dollar amount.

Portfolio mix

Which stocks does this person trade most? Tile size is dollars traded, all time on record.

CYTK$20.7M
CYTK$20.7M

Blum Robert I has traded 1 stock on record; the largest by dollars is CYTK.

Reporting lag

Does this person report on time? One bar per filing against the Form 4 deadline.

On timeLate
Form 4 deadlineoldest filingnewest

1 of 24 filings on record were reported after the Form 4 deadline (two business days, counted here as 4 calendar days).

What kind of transactions

Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.

Rows by Form 4 transaction code
CodeMeaningRowsSharesValue
SOpen-market sale22262,458$18.0M
MOption exercise or conversion18247,446$1.0M
AGrant or award5200,317—
GGift4199,202—
FShares withheld for tax339,291$2.6M
Rows by year of the trade
YearRowsBoughtSold
202639019 · $17.1M
20251306 · $3.5M

Transactions

Download CYTK trades (CSV)317 rows · 110 KB · every filer in this ticker, this insider included · all downloads

SecuritySideTrade dateDisclosedLagSharesPriceValueFlagsSourceShare
CYTKOption / conversion MOctober 12, 2026October 13, 20261d7,500——10b5-1 planderivativeForm 4 ↗
CYTKSell SOctober 12, 2026October 13, 20261d7,500$63$472K10b5-1 planForm 4 ↗
CYTKOption / conversion MOctober 12, 2026October 13, 20261d7,500$11$80K10b5-1 planForm 4 ↗
CYTKOption / conversion MSeptember 28, 2026September 28, 20260d7,500——10b5-1 planderivativeForm 4 ↗
CYTKSell SSeptember 28, 2026September 28, 20260d7,500$65$491K10b5-1 planForm 4 ↗
CYTKOption / conversion MSeptember 28, 2026September 28, 20260d7,500$11$80K10b5-1 planForm 4 ↗
CYTKOption / conversion MSeptember 14, 2026September 15, 20261d7,500——10b5-1 planderivativeForm 4 ↗
CYTKSell SSeptember 15, 2026September 15, 20260d97,926$69$6.8M10b5-1 planindirectForm 4 ↗
CYTKOther GSeptember 14, 2026September 15, 20261d97,926——10b5-1 planindirectForm 4 ↗
CYTKOther GSeptember 14, 2026September 15, 20261d97,926——10b5-1 planForm 4 ↗
CYTKOther GSeptember 14, 2026September 15, 20261d1,350——10b5-1 planForm 4 ↗
CYTKSell SSeptember 14, 2026September 15, 20261d7,500$73$551K10b5-1 planForm 4 ↗
CYTKOption / conversion MSeptember 14, 2026September 15, 20261d7,500$11$80K10b5-1 planForm 4 ↗
CYTKOption / conversion MAugust 31, 2026August 31, 20260d7,500——10b5-1 planderivativeForm 4 ↗
CYTKSell SAugust 31, 2026August 31, 20260d7,500$70$527K10b5-1 planForm 4 ↗
CYTKOption / conversion MAugust 31, 2026August 31, 20260d7,500$11$80K10b5-1 planForm 4 ↗
CYTKOption / conversion MAugust 10, 2026August 10, 20260d7,500——10b5-1 planderivativeForm 4 ↗
CYTKSell SAugust 10, 2026August 10, 20260d7,500$77$576K10b5-1 planForm 4 ↗
CYTKOption / conversion MAugust 10, 2026August 10, 20260d7,500$11$80K10b5-1 planForm 4 ↗
CYTKOption / conversion MJuly 27, 2026July 27, 20260d7,500——10b5-1 planderivativeForm 4 ↗
CYTKSell SJuly 27, 2026July 27, 20260d7,500$81$607K10b5-1 planForm 4 ↗
CYTKOption / conversion MJuly 27, 2026July 27, 20260d7,500$11$80K10b5-1 planForm 4 ↗
CYTKOption / conversion MJuly 13, 2026July 14, 20261d7,490——10b5-1 planderivativeForm 4 ↗
CYTKSell SJuly 13, 2026July 14, 20261d7,490$82$614K10b5-1 planForm 4 ↗
CYTKOption / conversion MJuly 13, 2026July 14, 20261d7,490$11$79K10b5-1 planForm 4 ↗
CYTKSell SJuly 13, 2026July 14, 20261d10$82$82010b5-1 planForm 4 ↗
CYTKSell SJuly 1, 2026July 2, 20261d7,500$85$637K10b5-1 planForm 4 ↗
CYTKSell SJune 15, 2026June 15, 20260d7,500$70$528K10b5-1 planForm 4 ↗
CYTKSell SMay 27, 2026May 28, 20261d7,500$77$579K10b5-1 planForm 4 ↗
CYTKSell SMay 14, 2026May 14, 20260d7,500$78$584K10b5-1 planForm 4 ↗
CYTKSell SApril 29, 2026April 29, 20260d7,500$60$447K10b5-1 planForm 4 ↗
CYTKSell SApril 15, 2026April 15, 20260d7,500$65$490K10b5-1 planForm 4 ↗
CYTKSell SApril 1, 2026April 1, 20260d7,500$67$500K10b5-1 planForm 4 ↗
CYTKSell SMarch 17, 2026March 18, 20261d23,928$62$1.5MForm 4 ↗
CYTKSell SMarch 17, 2026March 18, 20261d12,673$62$788KForm 4 ↗
CYTKOther AMarch 15, 2026March 17, 20262d111,864——derivativeForm 4 ↗
CYTKOther AMarch 15, 2026March 17, 20262d1,665——derivativeForm 4 ↗
CYTKOther AMarch 15, 2026March 17, 20262d75,258——Form 4 ↗
CYTKSell SMarch 9, 2026March 10, 20261d7,931$61$482KForm 4 ↗
CYTKSell FDecember 22, 2025December 29, 20257d2,935$63$184KlateForm 4 ↗
CYTKOther ADecember 22, 2025December 29, 20257d5,765——lateForm 4 ↗
CYTKOther ADecember 22, 2025December 29, 20257d5,765——lateForm 4 ↗
CYTKOption / conversion MDecember 22, 2025December 23, 20251d16,506——derivativeForm 4 ↗
CYTKOption / conversion MDecember 22, 2025December 23, 20251d54,727——derivativeForm 4 ↗
CYTKOption / conversion MDecember 22, 2025December 23, 20251d16,506$7$110KForm 4 ↗
CYTKSell FDecember 22, 2025December 23, 20251d30,426$68$2.1MForm 4 ↗
CYTKOption / conversion MDecember 22, 2025December 23, 20251d54,727$7$365KForm 4 ↗
CYTKSell FDecember 3, 2025December 5, 20252d5,930$65$386KForm 4 ↗
CYTKOther GNovember 5, 2025November 5, 20250d2,000——Form 4 ↗
CYTKSell SOctober 30, 2025October 30, 20250d5,000$63$314K10b5-1 planForm 4 ↗
CYTKSell SOctober 16, 2025October 16, 20250d5,000$60$300K10b5-1 planForm 4 ↗
CYTKSell SOctober 1, 2025October 1, 20250d5,000$55$275K10b5-1 planForm 4 ↗

Filings

FiledFormAccessionRowsStatusSource
October 13, 2026Form 40001061983-26-0000993publishedEDGAR ↗
September 28, 2026Form 40001061983-26-0000973publishedEDGAR ↗
September 15, 2026Form 40001061983-26-0000947publishedEDGAR ↗
August 31, 2026Form 40001061983-26-0000893publishedEDGAR ↗
August 10, 2026Form 40001061983-26-0000873publishedEDGAR ↗
July 27, 2026Form 40001061983-26-0000853publishedEDGAR ↗
July 14, 2026Form 40001061983-26-0000774publishedEDGAR ↗
July 2, 2026Form 40001061983-26-0000741publishedEDGAR ↗
June 15, 2026Form 40001061983-26-0000681publishedEDGAR ↗
May 28, 2026Form 40001061983-26-0000631publishedEDGAR ↗
May 14, 2026Form 40001061983-26-0000521publishedEDGAR ↗
April 29, 2026Form 40001061983-26-0000441publishedEDGAR ↗
April 15, 2026Form 40001061983-26-0000351publishedEDGAR ↗
April 1, 2026Form 40001061983-26-0000311publishedEDGAR ↗
March 18, 2026Form 40001061983-26-0000262publishedEDGAR ↗
March 17, 2026Form 40001061983-26-0000243publishedEDGAR ↗
March 10, 2026Form 40001061983-26-0000161publishedEDGAR ↗
December 29, 2025Form 40001061983-25-0000563publishedEDGAR ↗
December 23, 2025Form 40001061983-25-0000525publishedEDGAR ↗
December 5, 2025Form 40001061983-25-0000431publishedEDGAR ↗
November 5, 2025Form 40001061983-25-0000301publishedEDGAR ↗
October 30, 2025Form 40001061983-25-0000271publishedEDGAR ↗
October 16, 2025Form 40001061983-25-0000161publishedEDGAR ↗
October 1, 2025Form 40001061983-25-0000071publishedEDGAR ↗

Other insiders at CYTOKINETICS INC

Everyone on file, with contracts and lobbying under the company's name: CYTOKINETICS INC.

Guides for this page

Sources and method

Official sources behind this page
SourceFilingsRowsFirst filedNewest filedRead the originals
SEC EDGAR, Form 42452October 1, 2025October 13, 2026Form 4 list on EDGAR

Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.

Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.

Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.