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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1751299	Kaleido Biosciences Inc.	KLDO	()	4

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1219016	W Michael Bonney	C/O Kaleido Biosciences, Inc. 65 Hayden Avenue Lexington MA 02421	Executive Chair	Yes	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2019-02-28	68,965	$13.95	1,005,968	No	4	P	Direct
Common Stock	Acquisiton	2019-02-28	2,555	$14.65	1,008,523	No	4	P	Direct
Common Stock	Acquisiton	2019-03-04	417,673	$0.00	1,426,196	No	4	C	Direct
Common Stock	Acquisiton	2019-03-04	225,000	$0.00	225,000	No	4	C	Indirect	See Foonote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Direct
No	4	P	Direct
No	4	C	Direct
No	4	C	Indirect	See Foonote

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series B Preferred Stock	Disposition	2019-03-04	835,347	$0.00	417,673	$0.00
Common Stock	Series B Preferred Stock	Disposition	2019-03-04	450,000	$0.00	225,000	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0			No	4	C	Direct
0			No	4	C	Indirect

Footnotes

Each share of Series B Preferred Stock converted into shares of the Issuer's common stock, par value $0.001 ("Common Stock"), on a one-for-two basis upon the closing of the Issuer's initial public offering.
The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.50 to $14.35, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range.
The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $14.52 to $14.72, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range.
Shares held in the Michael and Alison Bonney 2016 Irrevocable Trust, which has an independent trustee.