[Form 4] Interactive Brokers Group, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Extra Space Storage Inc. (NYSE: EXR) filed a Form S-8 on 1 Aug 2025 to register 6,500,000 additional shares of common stock for issuance under its Amended & Restated 2015 Incentive Award Plan. The filing incorporates by reference the company’s 2024 10-K, 2025 Q1 & Q2 10-Qs and recent 8-Ks, thereby making those documents part of the prospectus delivered to plan participants. The company is a large accelerated filer and will offer the shares as awards are granted, exercised or distributed.

The S-8 includes customary MGCL-based indemnification language for directors and officers, a list of exhibits (legal opinion, auditor consent, updated plan document, etc.) and undertakings to file post-effective amendments if material changes occur. No new financial results or valuation metrics are disclosed; the statement’s sole purpose is to facilitate future equity compensation grants. Upon issuance, these shares will increase the public float and could dilute existing stockholders, but they also expand the company’s ability to attract and retain talent.

Positive

• Registers 6.5 M shares for continued use of equity incentives, supporting employee retention and alignment with shareholder interests.
• Transparent incorporation by reference of recent 10-K, 10-Qs and 8-Ks provides investors with up-to-date information without duplicative disclosures.

Negative

• Potential dilution to existing shareholders when the newly registered shares are issued upon vesting or exercise of awards.

Insights

Securities Analyst

TL;DR: S-8 registers 6.5 M shares for equity compensation; neutral impact, potential dilution countered by talent retention benefits.

The registration adds roughly 6.5 M shares to the pool available for employee awards under the 2015 plan. Because S-8s do not involve an immediate sale, there is no direct cash inflow or new valuation data. Dilution will occur only when awards vest or options are exercised, typically over multiple years. This level of share capacity signals continued reliance on stock-based pay, common for REITs with asset-heavy models. Investors should monitor future equity-based compensation expense and share-count trends disclosed in periodic reports. Overall, the filing is procedural and neutral for near-term valuation.

Corporate Governance Expert

TL;DR: Filing strengthens governance transparency; indemnification and exhibit list comply with MGCL, but dilution risk exists.

The company meets governance best practices by publicly filing an updated plan and incorporating prior reports, ensuring full disclosure to plan participants. Indemnification provisions mirror Maryland REIT norms, offering standard protections without overreaching. Board approval of an expanded share reserve highlights emphasis on equity alignment, yet investors must weigh dilution against motivational value. No red flags appear in the undertaking language or exhibit roster. Impact is operational, not strategic—hence classified as not materially impactful for governance risk profiles.

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^*

Nemser Earl H

(Last) (First) (Middle)

ONE PICKWICK PLAZA

(Street)

GREENWICH CT 06830

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Interactive Brokers Group, Inc. [ IBKR ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
07/30/2025

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)
			Code	V	Amount	(A) or (D)	Price
Class A common stock	07/30/2025		A		400,000(1)	A	$66.22(2)	760,114(1)(3)	I	by EN Holdings LLC
Class A common stock								427,812(4)	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. Represents number of securities acquired by a limited liability company, owned by the Reporting Person and his affiliates, in a partial redemption of its interest in IBG Holdings LLC. Such securities were acquired by IBG Holdings LLC from Interactive Brokers Group, Inc. immediately prior to the redemption in exchange for membership interests in IBG LLC.

2. The per share price provided represents the closing price of the issuer's Class A common stock on 7/30/2025, the date when the exchange described in footnote (6) took place.

3. Represents number of securities owned by EN Holdings LLC, which is owned by the reporting person and his affiliates.

4. This amount includes (a) Class A common stock attributable to vested restricted stock units that were awarded under the amended 2007 Stock Incentive Plan ("Plan") and (b) unvested restricted stock units that were awarded under the Plan.

	/s/ Raymond Bussiere as authorized signatory for Earl H. Nemser	08/01/2025
	** 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.

FAQ

How many shares did Extra Space Storage (EXR) register in its 2025 Form S-8?

The filing registers 6,500,000 shares of EXR common stock for the Amended 2015 Incentive Award Plan.

What is the purpose of EXR's Form S-8 filed on August 1, 2025?

Form S-8 allows EXR to issue the newly registered shares as equity awards to employees, directors and eligible participants under its incentive plan.

Does the S-8 filing include new financial results for Extra Space Storage?

No. No earnings or revenue data are provided; the filing is strictly for equity registration and references previously filed financial statements.

Will the registration immediately increase EXR's shares outstanding?

Not immediately. Shares will be added to the outstanding count only when awards are granted, vested, or options exercised under the plan.

Which documents are incorporated by reference into this S-8?

EXR’s 2024 10-K, 2025 Q1 & Q2 10-Qs, several 2025 8-Ks, and the Form 8-A description of common stock are incorporated by reference.