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CIK 0001728117 · Non-accelerated filer<br>Smaller reporting company

Gossamer Bio, Inc.

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Ticker
GOSS
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
FY end
Dec 31
Incorporated
DE
Entity type
operating
EIN
475461709
Phone
(858) 684-1300
Business address
3115 MERRYFIELD ROW, SUITE 120, SAN DIEGO, CA, 92121
  1. 4 Grant or award Chief Financial Officer acquired 46,500 shares (grant or award)
  2. 4 Grant or award President & CEO acquired 189,500 shares (grant or award)
  3. 4 Gift Chief Scientific Officer gave 4,000 shares (gift)
  4. 4 Open-market sale Chief Medical Officer sold 41,994 shares at an average $15.04 ($631,538)
  5. 4 Open-market buy EVP & General Counsel bought 1,000 shares at $16.65 ($16,654)
  6. 4 Open-market buy Director bought 10,000 shares at $16.80 ($167,980)
  7. 4 Open-market buy President & CEO bought 10,000 shares at $16.80 ($167,980)
  8. 4 Open-market buy Chief Financial Officer bought 1,121 shares at $16.78 ($18,810)
  9. 4 Open-market sale 10% owner sold 183,607 shares at $21.96 ($4,032,561)
  10. 4 Open-market sale 10% owner sold 82,213 shares at an average $21.75 ($1,787,758)
  11. 4 Open-market sale 10% owner sold 112,776 shares at an average $21.22 ($2,393,495)
  12. 4 Open-market sale 10% owner sold 21,404 shares at an average $21.56 ($461,537)
  13. 4 Open-market sale Chief Scientific Officer sold 50,000 shares at an average $19.88 ($994,043)
  14. 4 Derivatives Options or other derivatives
  15. 4 Derivatives Options or other derivatives
  16. 4 Derivatives Options or other derivatives
  17. 4 Derivatives Options or other derivatives
  18. 4 Derivatives Options or other derivatives
  19. 4 Derivatives Options or other derivatives
  20. 4 Open-market buy Chief Financial Officer bought 1,000 shares at $18.70 ($18,700)

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