Wellington Biomedical Innovation Master Investors (Cayman) II L.P. - 14 Sep 2023 Form 3 Insider Report for CARGO Therapeutics, Inc. (CRGX)

Role: 10%+ Owner
Signature: Wellington Biomedical Innovation Master Investors (Cayman) II L.P. By: Wellington Management Company LLP, as Investment Adviser /s/ Peter McIsaac, Authorized Person
Issuer symbol: CRGX
Transactions as of: 14 Sep 2023
Net transactions value: $0
Form type: 3
Filing time: 13 Nov 2023, 09:31:09 UTC
Next filing: 19 Sep 2023
SEC: View on sec.gov

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	CRGX	Series A-1 Preferred Stock							14 Sep 2023	Common Stock	737,000		Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each share of Series A-1 Preferred Stock is convertible into shares of the Issuer's Common Stock on a 13.5685-for-one basis at any time at the holder's election. Upon the closing of the Issuer's initial public offering, all such shares of Series A-1 Preferred Stock will automatically convert into the number of shares of Common Stock of the Issuer shown in column 3. The Series A-1 Preferred Stock has no expiration date.

Content

Each share of Series A-1 Preferred Stock is convertible into shares of the Issuer's Common Stock on a 13.5685-for-one basis at any time at the holder's election. Upon the closing of the Issuer's initial public offering, all such shares of Series A-1 Preferred Stock will automatically convert into the number of shares of Common Stock of the Issuer shown in column 3. The Series A-1 Preferred Stock has no expiration date.