Editas CEO sells 15,380 shares in tax-driven trade

Editas Medicine CEO O'Neill Gilmore Neil reported an automatic, tax-related share sale.

Accepted by SEC EDGAR 06/05/2026 - 04:33 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Editas Medicine CEO O'Neill Gilmore Neil reported an automatic, tax-related share sale. On June 3, 2026, he sold 15,380 shares of common stock at a weighted average price of $2.7011 per share, leaving 248,313 shares owned directly.

The sale was executed under a durable automatic sales instruction plan adopted on April 13, 2022, and was made to cover tax withholding obligations from restricted stock units that vested on June 2, 2026. The footnote states this was not a discretionary trade by the CEO.

Insider Trade Summary 10b5-1

Net Seller: 15,380 shares

Net Sell 1 txn

Insider O'Neill Gilmore Neil

Role CEO

Sold 15,380 shs ($42K)

Share of Position Sold 5.8%

Type	Security	Shares	Price	Value
Sale	Common Stock	15,380	$2.7011	$42K

Holdings After Transaction: Common Stock — 248,313 shares (Direct)

Holdings Before and After: Common Stock, 263,693 to 248,313 shares (Direct)

Other Insiders: 2 other insiders reported open-market sales of this stock in the 30 days up to this filing.

Footnotes (2)

1. F1. Sale was effected pursuant to a durable automatic sales instruction plan adopted by the Reporting Person on April 13, 2022, and represents the sale of shares by the Issuer necessary to meet tax withholding obligations as a result of vesting in restricted stock units on June 2, 2026. The sale does not represent a discretionary trade by the Reporting Person.
2. F2. This transaction was executed in multiple trades at prices ranging from $2.7010 to $2.7250. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request, to the SEC staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Key Figures

Shares sold: 15,380 shares Weighted average price: $2.7011 per share Shares owned after transaction: 248,313 shares +2 more

5 metrics

Shares sold 15,380 shares Common Stock sale on June 3, 2026

Weighted average price $2.7011 per share Open-market sale price range $2.7010–$2.7250

Shares owned after transaction 248,313 shares Direct ownership following the June 3, 2026 sale

Plan adoption date April 13, 2022 Durable automatic sales instruction plan adoption

RSU vesting date June 2, 2026 Restricted stock units vesting that triggered tax withholding

Key Terms

durable automatic sales instruction plan, restricted stock units, weighted average purchase price, open market or private transaction

4 terms

durable automatic sales instruction plan financial

"Sale was effected pursuant to a durable automatic sales instruction plan adopted by the Reporting Person on April 13, 2022"

restricted stock units financial

"represents the sale of shares by the Issuer necessary to meet tax withholding obligations as a result of vesting in restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

weighted average purchase price financial

"The price reported above reflects the weighted average purchase price"

The weighted average purchase price is the average cost per share you paid across multiple buys, calculated so larger purchases count more than smaller ones. Imagine buying apples at different prices: the overall price you effectively paid depends on how many apples you bought at each price. Investors use it to measure true cost basis, calculate gains or losses, decide when to sell, and manage taxes and portfolio performance.

open market or private transaction financial

"Sale in open market or private transaction"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Editas Medicine (EDIT) CEO report in this Form 4 filing?

The CEO reported selling 15,380 shares of Editas Medicine common stock. The sale was tied to tax withholding for vested restricted stock units and executed under a pre-arranged automatic sales instruction plan rather than a discretionary trade.

How many Editas Medicine (EDIT) shares did the CEO sell and at what price?

He sold 15,380 shares of common stock at a weighted average price of $2.7011 per share. The transaction was executed in multiple trades within a narrow price range between $2.7010 and $2.7250, according to the filing footnote.

How many Editas Medicine (EDIT) shares does the CEO hold after this transaction?

Following the reported sale, the CEO directly holds 248,313 shares of Editas Medicine common stock. This figure reflects his remaining position after the 15,380 shares were sold to satisfy tax withholding obligations related to restricted stock unit vesting.

Was the Editas Medicine (EDIT) CEO’s share sale a discretionary trade?

No, the filing states the sale did not represent a discretionary trade by the CEO. It was executed under a durable automatic sales instruction plan and was necessary to meet tax withholding obligations arising from restricted stock units that vested on June 2, 2026.

Why did the Editas Medicine (EDIT) CEO sell shares in this transaction?

The sale was made to satisfy tax withholding obligations triggered by the vesting of restricted stock units on June 2, 2026. The filing explains the transaction occurred pursuant to an automatic sales instruction plan established on April 13, 2022, rather than a new trading decision.

How was the sale price for the Editas Medicine (EDIT) CEO’s shares determined?

The transaction was executed in multiple trades with prices ranging from $2.7010 to $2.7250 per share. The Form 4 reports a weighted average price of $2.7011, and the CEO has undertaken to provide full trade details upon request to regulators or shareholders.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

O'Neill Gilmore Neil

(Last) (First) (Middle)

C/O EDITAS MEDICINE, INC.

11 HURLEY ST.

(Street)

CAMBRIDGE MASSACHUSETTS 02141

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Editas Medicine, Inc. [ EDIT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/03/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/03/2026		S(1)		15,380	D	$2.7011(2)	248,313	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Sale was effected pursuant to a durable automatic sales instruction plan adopted by the Reporting Person on April 13, 2022, and represents the sale of shares by the Issuer necessary to meet tax withholding obligations as a result of vesting in restricted stock units on June 2, 2026. The sale does not represent a discretionary trade by the Reporting Person.

2. This transaction was executed in multiple trades at prices ranging from $2.7010 to $2.7250. The price reported above reflects the weighted average purchase price. The Reporting Person hereby undertakes to provide upon request, to the SEC staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

Remarks:

	/s/ Gilmore O'Neill	06/05/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)