Sell4

Cue Biopharma, Inc.

CUE

Total Value

$1.6M

Net $1.6M sold

Filing Date

Aug 14, 2026

5 transactions

Sales

$1.6M

5 transactions

Trade Summary

On Aug 12, 2026 through Aug 13, 2026, Lin Shao-Lee, Insider, sold $1.6M of Cue Biopharma, Inc. (CUE) across 5 transactions. The filing covers Common Stock and reflects net selling of $1.6M. Reported prices ranged from $26.99 to $29.48. Insider transactions are sourced from SEC Form 4 disclosures and should be reviewed alongside company fundamentals and the insider's broader trading history.

Price at the Time of the Trade

CUE daily price with the insider's sale marked at $27.58.

Sold in the upper half of the 6-month range · the stock trades 7% lower today.

Price data is delayed and provided for context only — not investment advice.

Insider Information

Name: Lin Shao-Lee
Role: Insider
Location: BOSTON, MA

Filing Details

Filing Date: Aug 14, 2026
Transaction Date: Aug 12, 2026
Accession Number: 0001725092-26-000013
Form Type: 4
Net Trading Amount: -$1.6M

Non-Derivative Transactions

Date	Security	Shares	Price	Type	Value
Aug 12, 2026	Common Stock	109,179	—	Exercise	—
Aug 12, 2026	Common Stock	34,225	$26.99	Sale	$923.7K
Aug 12, 2026	Common Stock	5,775	$27.75	Sale	$160.3K
Aug 13, 2026	Common Stock	5,423	$27.19	Sale	$147.5K
Aug 13, 2026	Common Stock	2,375	$28.11	Sale	$66.8K
Aug 13, 2026	Common Stock	10,460	$29.48	Sale	$308.4K

Derivative Transactions

Date	Security	Shares	Exercise Price	Type	Value
Aug 12, 2026	CUE derivative	109,179	—	Exercise	—

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Footnotes

(F1)The sales reported represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units. The sales were to satisfy tax withholding obligations to be funded by a "sell-to-cover" transaction and do not represent discretionary transactions by the reporting person.
(F2)The price reported in this line item is a weighted average price. These shares were sold as part of block trades for multiple security holders of the Issuer at prices ranging from $26.50 to $27.495, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein to the block trades.
(F3)The price reported in this line item is a weighted average price. These shares were sold as part of block trades for multiple security holders of the Issuer at prices ranging from $27.50 to $28.13, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein to the block trades.
(F4)The price reported in this line item is a weighted average price. These shares were sold as part of block trades for multiple security holders of the Issuer at prices ranging from $26.70 to $27.69, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein to the block trades.
(F5)The price reported in this line item is a weighted average price. These shares were sold as part of block trades for multiple security holders of the Issuer at prices ranging from $27.78 to $28.505, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein to the block trades.
(F6)The price reported in this line item is a weighted average price. These shares were sold as part of block trades for multiple security holders of the Issuer at prices ranging from $28.90 to $29.87, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein to the block trades.
(F7)The performance stock units ("PSU") were awarded subject to certain stock-price based vesting conditions with vesting comprised of three substantially equal tranches that are eligible to vest based the achievement of a closing price per share of $33.00, $38.50 and $44.00, in each case for a period of five consecutive trading days. If the stock price targets are not satisfied by the period ending 24 months from the date of grant, the PSUs shall automatically be forfeited and cancelled without consideration. The award settled with respect to 1/3 of the PSUs underlying the award on August 12, 2026. The remaining 2/3 of the PSUs underlying the award are expected to settle on the achievement of a closing price per share of $38.50 and $44.00, in each case for a period of five consecutive trading days.

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).

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^*

Lin Shao-Lee

(Last)

(First)

(Middle)

C/O CUE BIOPHARMA, INC.

40 GUEST STREET

(Street)

BOSTON

02135

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
Cue Biopharma, Inc. [ CUE ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
08/12/2026

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

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

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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	08/12/2026		M		109,179	A	$0	764,253	D
Common Stock	08/12/2026		S⁽¹⁾		34,225	D	$26.99⁽²⁾	730,028	D
Common Stock	08/12/2026		S⁽¹⁾		5,775	D	$27.75⁽³⁾	724,253	D
Common Stock	08/13/2026		S⁽¹⁾		5,423	D	$27.19⁽⁴⁾	718,830	D
Common Stock	08/13/2026		S⁽¹⁾		2,375	D	$28.11⁽⁵⁾	716,455	D
Common Stock	08/13/2026		S⁽¹⁾		10,460	D	$29.48⁽⁶⁾	705,995	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	⁽⁷⁾	08/12/2026		M			109,179	⁽⁷⁾	⁽⁷⁾	Common Stock	109,179	$0	218,358	D

Explanation of Responses:

1. The sales reported represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units. The sales were to satisfy tax withholding obligations to be funded by a "sell-to-cover" transaction and do not represent discretionary transactions by the reporting person.

2. The price reported in this line item is a weighted average price. These shares were sold as part of block trades for multiple security holders of the Issuer at prices ranging from $26.50 to $27.495, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein to the block trades.

3. The price reported in this line item is a weighted average price. These shares were sold as part of block trades for multiple security holders of the Issuer at prices ranging from $27.50 to $28.13, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein to the block trades.

4. The price reported in this line item is a weighted average price. These shares were sold as part of block trades for multiple security holders of the Issuer at prices ranging from $26.70 to $27.69, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein to the block trades.

5. The price reported in this line item is a weighted average price. These shares were sold as part of block trades for multiple security holders of the Issuer at prices ranging from $27.78 to $28.505, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein to the block trades.

6. The price reported in this line item is a weighted average price. These shares were sold as part of block trades for multiple security holders of the Issuer at prices ranging from $28.90 to $29.87, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein to the block trades.

7. The performance stock units ("PSU") were awarded subject to certain stock-price based vesting conditions with vesting comprised of three substantially equal tranches that are eligible to vest based the achievement of a closing price per share of $33.00, $38.50 and $44.00, in each case for a period of five consecutive trading days. If the stock price targets are not satisfied by the period ending 24 months from the date of grant, the PSUs shall automatically be forfeited and cancelled without consideration. The award settled with respect to 1/3 of the PSUs underlying the award on August 12, 2026. The remaining 2/3 of the PSUs underlying the award are expected to settle on the achievement of a closing price per share of $38.50 and $44.00, in each case for a period of five consecutive trading days.

	/s/ Shao-Lee Lin	08/14/2026
	** 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 as rendered by the SEC from accession 0001725092-26-000013.

Cue Biopharma, Inc.

Trade Summary

Price at the Time of the Trade

Company Information

Insider Information

Filing Details

Non-Derivative Transactions

Derivative Transactions

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Footnotes

SEC Form 4

SEC Filing

SEC Form 4

Price at the Time of the Trade