Were Mark Streams’ StubHub (STUB) share sales made under a Rule 10b5-1 plan?

Yes, the filing states that the reported sales were effected pursuant to a Rule 10b5-1 trading plan adopted on December 10, 2025. Such plans pre-schedule transactions, helping separate routine portfolio management from discretionary market-timing decisions by insiders.

Mark Streams at StubHub (STUB) sells shares under 10b5-1 and receives 155,520 RSUs

Filing Impact

(Moderate)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

StubHub Holdings, Inc. director and officer Mark Streams reported multiple transactions in Class A common stock. He sold 28,531 shares on July 6, 2026 at a weighted average price of $13.0175 per share and 3,002 shares on July 1, 2026 at $13.00 per share, both as open-market sales made under a Rule 10b5-1 trading plan adopted on December 10, 2025. On July 5, 2026 he also received a grant of 155,520 restricted stock units at no cost, which vest in twelve substantially equal monthly installments beginning on July 31, 2026. After the most recent sale, he directly holds 1,561,122 shares of StubHub Class A common stock.

Insider Trade Summary 10b5-1

Net Seller: 31,533 shares ($410,428)

Net Sell 3 txns

Insider Streams Mark

Role See Remarks

Sold 31,533 shs ($410K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	28,531	$13.0175	$371K
Grant/Award	Class A Common Stock	155,520	$0.00	--
Sale	Class A Common Stock	3,002	$13.00	$39K

Holdings After Transaction: Class A Common Stock — 1,561,122 shares (Direct, null)

Footnotes (1)

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on December 10, 2025. Represents an award of restricted stock units ("RSUs"). The RSUs vest in twelve substantially equal monthly installments beginning on July 31, 2026. Each RSU represents a contingent right to receive one share of Issuer Class A common stock. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $13.00 to $13.06. The reporting person undertakes to provide 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 sold at each separate price within the range set forth in this footnote.

Key Figures

Shares sold July 6, 2026: 28,531 shares at $13.0175 Shares sold July 1, 2026: 3,002 shares at $13.00 Total shares sold: 31,533 shares +4 more

7 metrics

Shares sold July 6, 2026 28,531 shares at $13.0175 Open-market sale of Class A Common Stock

Shares sold July 1, 2026 3,002 shares at $13.00 Open-market sale of Class A Common Stock

Total shares sold 31,533 shares Combined July 1 and July 6, 2026 sales

RSU grant size 155,520 RSUs at $0.00 Award of restricted stock units on July 5, 2026

Post-transaction holdings 1,561,122 shares Direct ownership after latest sale

Trading plan adoption date December 10, 2025 Rule 10b5-1 plan governing reported sales

RSU vesting schedule 12 monthly installments Vesting begins July 31, 2026

Key Terms

Rule 10b5-1 trading plan, restricted stock units ("RSUs"), weighted average price, contingent right

4 terms

Rule 10b5-1 trading plan regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on December 10, 2025."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

restricted stock units ("RSUs") financial

"Represents an award of restricted stock units ("RSUs"). The RSUs vest in twelve substantially equal monthly installments..."

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

weighted average price financial

"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions..."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

contingent right financial

"Each RSU represents a contingent right to receive one share of Issuer Class A common stock."

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/06/2026 - 08:33 PM Accepted by SEC EDGAR 07/06/2026 - 08:33 PM

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^*

Streams Mark

(Last)

(First)

(Middle)

C/O STUBHUB HOLDINGS, INC.

175 GREENWICH STREET, 59TH FLOOR

(Street)

NEW YORK

10007

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
StubHub Holdings, Inc. [ STUB ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/01/2026

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)
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)
Class A Common Stock	07/01/2026		S		3,002⁽¹⁾	D	$13	1,434,133	D
Class A Common Stock	07/05/2026		A		155,520⁽²⁾	A	$0	1,589,653	D
Class A Common Stock	07/06/2026		S		28,531⁽¹⁾	D	$13.0175⁽³⁾	1,561,122	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)

Explanation of Responses:

1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on December 10, 2025.

2. Represents an award of restricted stock units ("RSUs"). The RSUs vest in twelve substantially equal monthly installments beginning on July 31, 2026. Each RSU represents a contingent right to receive one share of Issuer Class A common stock.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $13.00 to $13.06. The reporting person undertakes to provide 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 sold at each separate price within the range set forth in this footnote.

Remarks:

Executive Vice Chairman & Chief Legal Officer

	/s/ Mark Streams	07/06/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did Mark Streams report at StubHub (STUB)?

Mark Streams reported two open-market sales totaling 31,533 StubHub Class A shares and one grant of 155,520 restricted stock units. The sales occurred on July 1 and July 6, 2026, and the RSU award was granted on July 5, 2026.

How many StubHub (STUB) shares did Mark Streams sell and at what prices?

Mark Streams sold 28,531 StubHub Class A shares at a weighted average price of $13.0175 and 3,002 shares at $13.00 per share. These open-market sales were executed on July 6 and July 1, 2026, respectively, under a pre-established trading arrangement.

What is the size and vesting schedule of Mark Streams’ RSU grant at StubHub (STUB)?

Mark Streams received 155,520 restricted stock units, each representing one StubHub Class A share. The RSUs vest in twelve substantially equal monthly installments starting on July 31, 2026, providing a steady stream of share delivery over the following year, subject to continued service conditions.

How many StubHub (STUB) shares does Mark Streams hold after these transactions?

Following the most recent reported sale, Mark Streams directly holds 1,561,122 StubHub Class A common shares. This figure reflects his remaining ownership position after selling 31,533 shares in early July 2026 while also receiving a substantial RSU award that will vest over time.