Lee Sung

Director · Officer · CYTK, TNGX

As of 2026-09-16, Lee Sung has 51 Form 4 transactions on record across 2 companies — 44 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: $1.9MIndirect: $0$1.9Mas of 2026-09-16
  • Direct $1.9M
  • Indirect $0
CYTKdirect26,709 sh$1.9M
TNGXdirect3,570 sh$83K

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 · 45 trades
2026-07-01: Sale, 1,112 sh ($98K)2026-07-01: Option exercise, 1,112 sh ($54K)2026-07-01: Option exercise, 1,112 sh ($0)2026-06-29: Sale, 3,134 sh ($266K)2026-06-29: Option exercise, 1,113 sh ($54K)2026-06-29: Option exercise, 823 sh ($37K)2026-06-29: Option exercise, 822 sh ($36K)2026-06-29: Option exercise, 188 sh ($8K)2026-06-29: Option exercise, 188 sh ($8K)2026-06-29: Option exercise, 822 sh ($0)2026-06-29: Option exercise, 823 sh ($0)2026-06-29: Option exercise, 188 sh ($0)2026-06-29: Option exercise, 1,113 sh ($0)2026-06-29: Option exercise, 188 sh ($0)2026-06-24: Sale, 38,730 sh ($3.2M)2026-06-24: Option exercise, 23,370 sh ($1.1M)2026-06-24: Option exercise, 9,307 sh ($413K)2026-06-24: Option exercise, 2,817 sh ($125K)2026-06-24: Option exercise, 1,113 sh ($54K)2026-06-24: Option exercise, 1,113 sh ($54K)2026-06-24: Option exercise, 822 sh ($36K)2026-06-24: Option exercise, 188 sh ($8K)2026-06-24: Option exercise, 9,307 sh ($0)2026-06-24: Option exercise, 23,370 sh ($0)2026-06-24: Option exercise, 2,817 sh ($0)2026-06-24: Option exercise, 1,113 sh ($0)2026-06-24: Option exercise, 188 sh ($0)2026-06-24: Option exercise, 822 sh ($0)2026-06-24: Option exercise, 1,113 sh ($0)2026-05-05: Sale, 23,906 sh ($1.8M)2026-03-17: Sale, 4,935 sh ($307K)2026-03-15: Award / grant, 29,480 sh ($0)2026-03-15: Award / grant, 1,665 sh ($0)2026-03-15: Award / grant, 20,646 sh ($0)2025-12-22: Withheld for tax, 805 sh ($50K)2025-12-22: Award / grant, 2,152 sh ($0)2025-12-22: Award / grant, 2,152 sh ($0)2025-12-03: Withheld for tax, 1,560 sh ($101K)2025-06-02: Withheld for tax, 4,965 sh ($155K)2025-03-14: Award / grant, 32,687 sh ($0)2025-03-14: Award / grant, 9,016 sh ($0)2025-03-14: Award / grant, 41,326 sh ($0)2024-12-03: Withheld for tax, 1,536 sh ($79K)2024-12-03: Award / grant, 4,304 sh ($0)2024-12-03: Award / grant, 4,303 sh ($0)
TNGX · 6 trades
2026-06-05: Award / grant, 3,570 sh ($0)2026-06-05: Award / grant, 570 sh ($0)2026-04-29: Award / grant, 12,300 sh ($0)2026-04-29: Award / grant, 5,200 sh ($0)2026-01-02: Award / grant, 60,000 sh ($0)2026-01-02: Award / grant, 10,000 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-07-01CYTKSale1,112 @ $87.79$98K−1.7% of holding63,221Form 4
2026-06-29CYTKSale3,134 @ $85.00$266K−4.7% of holding63,221Form 4
2026-06-24CYTKSale38,730 @ $82.30$3.2M−38.0% of holding63,221Form 4
2026-05-05CYTKSale23,906 @ $76.87$1.8M−27.4% of holding63,221Form 4
2026-03-17CYTKSale4,935 @ $62.15$307K−5.4% of holding87,127Form 4
46 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-07-01CYTKOption exercise1,11264,333Form 4
2026-07-01CYTKOption exercise1,11226,709Form 4
2026-06-29CYTKOption exercise1,11365,344Form 4
2026-06-29CYTKOption exercise82366,355Form 4
2026-06-29CYTKOption exercise82264,231Form 4
2026-06-29CYTKOption exercise18865,532Form 4
2026-06-29CYTKOption exercise18863,409Form 4
2026-06-29CYTKOption exercise82240,504Form 4
2026-06-29CYTKOption exercise82339,681Form 4
2026-06-29CYTKOption exercise1888,640Form 4
2026-06-29CYTKOption exercise1,11352,304Form 4
2026-06-29CYTKOption exercise1888,828Form 4
2026-06-24CYTKOption exercise23,37086,591Form 4
2026-06-24CYTKOption exercise9,30795,898Form 4
2026-06-24CYTKOption exercise2,81798,715Form 4
2026-06-24CYTKOption exercise1,113101,951Form 4
2026-06-24CYTKOption exercise1,11399,828Form 4
2026-06-24CYTKOption exercise822100,838Form 4
2026-06-24CYTKOption exercise188100,016Form 4
2026-06-24CYTKOption exercise9,30732,019Form 4
2026-06-24CYTKOption exercise23,37030,047Form 4
2026-06-24CYTKOption exercise2,8176,199Form 4
2026-06-24CYTKOption exercise1,11328,934Form 4
2026-06-24CYTKOption exercise1886,011Form 4
2026-06-24CYTKOption exercise82231,197Form 4
2026-06-24CYTKOption exercise1,11327,821Form 4
2026-06-05TNGXAward / grant3,5703,570Form 4
2026-06-05TNGXAward / grant57022,870Form 4
2026-04-29TNGXAward / grant12,30022,300Form 4
2026-04-29TNGXAward / grant5,2005,200Form 4
2026-03-15CYTKAward / grant29,48029,480Form 4
2026-03-15CYTKAward / grant1,6651,665Form 4
2026-03-15CYTKAward / grant20,64692,062Form 4
2026-01-02TNGXAward / grant60,00060,000Form 4
2026-01-02TNGXAward / grant10,00010,000Form 4
2025-12-22CYTKWithheld for tax80571,416Form 4
2025-12-22CYTKAward / grant2,15272,221Form 4
2025-12-22CYTKAward / grant2,15270,069Form 4
2025-12-03CYTKWithheld for tax1,56067,917Form 4
2025-06-02CYTKWithheld for tax4,96569,477Form 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.