Harrington Robert Arthur

Director · CYTK

As of 2026-09-16, Harrington Robert Arthur has 15 Form 4 transactions on record across 1 company — 7 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Reconstructed holdings

Direct: $1.5MIndirect: $0$1.5Mas of 2026-09-16
  • Direct $1.5M
  • Indirect $0
CYTKdirect21,932 sh$1.5M

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

CYTK · 15 trades
2026-07-15: Award / grant, 151 sh ($12K)2026-05-27: Award / grant, 4,301 sh ($0)2026-05-27: Award / grant, 2,851 sh ($0)2026-04-15: Award / grant, 191 sh ($12K)2026-01-15: Award / grant, 197 sh ($12K)2025-12-01: Sale, 2,150 sh ($144K)2025-10-15: Award / grant, 199 sh ($12K)2025-09-02: Sale, 2,150 sh ($105K)2025-07-15: Award / grant, 328 sh ($12K)2025-05-14: Award / grant, 10,880 sh ($0)2025-05-14: Award / grant, 7,333 sh ($0)2025-04-15: Award / grant, 324 sh ($12K)2025-04-03: Sale, 450 sh ($18K)2025-03-04: Sale, 900 sh ($38K)2025-01-02: Award / grant, 255 sh ($12K)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2025-12-01CYTKSale2,150 @ $66.80$144K−10.4% of holding18,542Form 4
2025-09-02CYTKSale2,150 @ $48.67$105K−9.5% of holding20,493Form 4
2025-04-03CYTKSale450 @ $39.43$18K−3.0% of holding14,658Form 4
2025-03-04CYTKSale900 @ $42.50$38K−5.6% of holding15,108Form 4
11 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-07-15CYTKAward / grant15121,932Form 4
2026-05-27CYTKAward / grant4,3014,301Form 4
2026-05-27CYTKAward / grant2,85121,781Form 4
2026-04-15CYTKAward / grant19118,930Form 4
2026-01-15CYTKAward / grant19718,739Form 4
2025-10-15CYTKAward / grant19920,692Form 4
2025-07-15CYTKAward / grant32822,643Form 4
2025-05-14CYTKAward / grant10,88010,880Form 4
2025-05-14CYTKAward / grant7,33322,315Form 4
2025-04-15CYTKAward / grant32414,982Form 4
2025-01-02CYTKAward / grant25516,008Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.