LYTIR

Company · BOLD

Boundless Bio, Inc.

Nasdaq's symbol directory lists BOLD on Nasdaq as “Boundless Bio, Inc. - Common Stock”.

In the 12 months to Nov 8, 2026: insiders bought on 28 occasions ($2.0M); insiders sold on 2 occasions ($94K); 3 filings by holders of 5% or more.

All insider filings at the SEC

Insider purchases and sales, by month (last 12 months)Insider purchases: $2.0M in total; Insider sales: $94K in total.Jun: Insider purchases $781KJul: Insider purchases $734KJul: Insider sales $40KAug: Insider sales $54KOct: Insider purchases $427KNov: Insider purchases $27KDecJanFebMarAprMayJunJulAugSepOctNov
Insider purchases above the line: $2.0MInsider sales below: $94K
Dollar value of open-market purchases and sales reported on SEC Form 4, by the month traded. Sales include pre-arranged 10b5-1 plan sales.

Insider trades · SEC Form 4

Those inside the hall

Open-market purchases and sales only. Legs one person filed for one day are combined.

Who traded

  1. Kevin Tang sold on 1 day bought on 28 days latest Nov 5, 2026 sold $54K · bought $2.0M
  2. CRANDELL KEITH sold on 1 day latest Jul 1, 2026 sold $40K
Every trade (30)
  1. BUYKevin Tang bought Nov 5, 2026 8,390 shares filing $20K
  2. BUYKevin Tang bought Nov 4, 2026 517 shares filing $1K
  3. BUYKevin Tang bought Nov 3, 2026 2,255 shares filing $5K
  4. BUYKevin Tang bought Oct 27, 2026 10,707 shares filing $26K
  5. BUYKevin Tang bought Oct 26, 2026 9,606 shares filing $23K
  6. BUYKevin Tang bought Oct 23, 2026 6,234 shares filing $15K
  7. BUYKevin Tang bought Oct 22, 2026 5,800 shares filing $14K
  8. BUYKevin Tang bought Oct 20, 2026 220 shares filing $521
  9. BUYKevin Tang bought Oct 19, 2026 31,069 shares 2 legs combined filing $73K
  10. BUYKevin Tang bought Oct 16, 2026 118,185 shares filing $277K
  11. SELLKevin Tang sold Aug 26, 2026 18,300 shares filing $54K
  12. BUYKevin Tang bought Jul 21, 2026 2,975 shares filing $7K
  13. BUYKevin Tang bought Jul 20, 2026 1,623 shares filing $4K
  14. BUYKevin Tang bought Jul 17, 2026 265 shares filing $647
  15. BUYKevin Tang bought Jul 16, 2026 18,491 shares filing $45K
  16. BUYKevin Tang bought Jul 15, 2026 1,600 shares filing $4K
  17. BUYKevin Tang bought Jul 14, 2026 43,878 shares filing $107K
  18. BUYKevin Tang bought Jul 13, 2026 48,211 shares filing $117K
  19. BUYKevin Tang bought Jul 10, 2026 43,367 shares filing $105K
  20. BUYKevin Tang bought Jul 9, 2026 7 shares filing $17
  21. BUYKevin Tang bought Jul 8, 2026 14,338 shares filing $35K
  22. BUYKevin Tang bought Jul 7, 2026 15,810 shares filing $39K
  23. BUYKevin Tang bought Jul 6, 2026 27,062 shares filing $67K
  24. BUYKevin Tang bought Jul 2, 2026 9,821 shares filing $24K
  25. BUYKevin Tang bought Jul 1, 2026 71,612 shares filing $178K
  26. SELLCRANDELL KEITH sold Jul 1, 2026 16,000 shares filing $40K
  27. BUYKevin Tang bought Jun 30, 2026 26,030 shares 2 legs combined filing $66K
  28. BUYKevin Tang bought Jun 29, 2026 64,762 shares 2 legs combined filing $160K
  29. BUYKevin Tang bought Jun 26, 2026 75,181 shares 2 legs combined filing $192K
  30. BUYKevin Tang bought Jun 25, 2026 146,390 shares 2 legs combined filing $363K

Large holders · SEC Schedules 13D and 13G

Five percent and over

Anyone who comes to hold more than 5% of a company's voting shares must tell the SEC. A Schedule 13D is filed by a holder who may seek to influence the company; a 13G by one who states it is a passive investor. An amendment updates an earlier filing, and a stake reported as 0% means the holder says it has sold all, or nearly all, of its shares. Every recent 13D and 13G

  1. Hornby Zachary filed Aug 27, 2026 Schedule 13G passive filing 9.8%
  2. ADAR1 Capital Management, LLC filed Aug 14, 2026 Schedule 13G passive filing 8.8%
  3. Citadel Advisors LLC filed Aug 14, 2026 Schedule 13G/A passive filing 0.6%

Sources: SEC EDGAR (Forms 4 and 144) and STOCK Act periodic transaction reports. Filings can be late, amended or wrong at the source; see methodology.