Exhibit 107

CALCULATION OF FILING FEE TABLES

Form S-3

(Form Type)

2seventy bio, Inc.

(Exact Name of Registrant as Specified in its Charter)

Table 1: Newly Registered and Carry Forward Securities

Security Type

Security Class Title

Fee Calculation or Carry Forward Rule

Amount Registered(1)

Proposed Maximum Offering Price Per Unit(2)

Maximum Aggregate Offering Price

Fee Rate

Amount of Registration Fee

Carry Forward Form Type

Carry Forward File Number

Carry Forward Initial Effective Date

Filing Fee Previously Paid In Connection with Unsold Securities to be Carried Forward

Newly Registered Securities

Primary Offering of Securities:

Fees to Be Paid

Equity

Common Stock, par value $0.0001 per share(3)

Rule 457(o)

—

—

—

—

—

Fees to Be Paid

Equity

Preferred Stock, par value $0.0001 per share(4)

Rule 457(o)

—

—

—

—

—

Fees to Be Paid

Debt

Debt Securities(5)

Rule 457(o)

—

—

—

—

—

Fees to Be Paid

Equity

Warrants(6)

Rule 457(o)

—

—

—

—

—

Fees to Be Paid

Equity

Units(7)

Rule 457(o)

—

—

—

—

—

Fees to Be Paid	Unallocated (Universal) Shelf	(1)	Rule 457(o)	$400,000,000	—	$400,000,000	0.00011020	$44,080
Fees to Be Paid	Total Registration Fee:			$400,000,000	N/A	$400,000,000	—	$44,080
Carry Forward Securities
Carry Forward Securities	—	—	—	—	—	—	—	—	—	—	—	—
	Total Offering Amounts					$400,000,000		$44,080
	Total Fees Previously Paid							—
	Total Fee Offsets							—
	Net Fee Due							$44,080

(1)The amount to be registered consists of up to $400,000,000 of an indeterminate amount of common stock, preferred stock, debt securities, warrants and/or units that may be offered and sold from time to time in one or more offerings. There is also being registered hereunder such currently indeterminate number of (i) shares of common stock or other securities of the registrant as may be issued upon conversion of, or in exchange for, convertible or exchangeable debt securities and/or preferred stock registered hereby, or (ii) shares of debt securities, common stock, preferred stock or units as may be issued upon exercise of warrants registered hereby, as the case may be, including under any applicable antidilution provisions. Any securities registered hereunder may be sold separately or together with other securities registered hereunder. Pursuant to Rule 416 under the Securities Act of 1933, as amended (the “Securities Act”), this registration statement also covers any additional securities that may be offered or issued in connection with any stock split, stock dividend or pursuant to anti-dilution provisions of any of the securities. Separate consideration may or may not be received for securities that are issuable upon conversion, exercise or exchange of other securities.

(2)The proposed maximum offering price per security will be determined from time to time by the registrant in connection with the issuance by the registrant of the securities registered hereunder and is not specified as to each class of security pursuant to General Instruction II.D. of Form S-3 under the Securities Act.

(3)Including such indeterminate amount of common stock as may be issued from time to time at indeterminate prices or upon conversion of debt securities and/or preferred stock, or upon exercise of warrants registered hereby, as the case may be.

(4)Including such indeterminate amount of preferred stock as may be issued from time to time at indeterminate prices or upon conversion of debt securities and/or preferred stock, or upon exercise of warrants registered hereby, as the case may be.

(5)Including such indeterminate principal amount of debt securities as may be issued from time to time at indeterminate prices or upon exercise of warrants registered hereby, as the case may be.

(6)Warrants may be sold separately or together with any of the securities registered hereby and may be exercisable for shares of common stock, preferred stock, debt securities, or units registered hereby. Because the warrants will provide a right only to purchase such securities offered hereunder, no additional registration fee is required.

(7)Each unit will be issued under a unit agreement and will represent an interest in two or more securities registered pursuant to this registration statement, which may or may not be separable from one another. Because the units will provide a right only to purchase such securities offered hereunder, no additional registration fee is required.