IBKR

SEC source: 0001140361-17-022516 · doc1.xml · nonDerivative · entry 1

Frank Thomas AJ · CIK 0001391401 · Chief Information Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 311,827

F1 · price: The price represents the closing price of the issuer's Class A common stock as of May 9, 2017, the vesting date.

F2 · balance_after: These shares represent the aggregate number of shares of restricted stock from awards granted under the 2007 Stock Incentive Plan since its inception, less vested shares that were withheld for tax purposes, or sold previously.

SEC source: 0001140361-17-020741 · doc1.xml · nonDerivative · entry 3

Galik Milan · CIK 0001391404 · Director · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 849,751

F1 · shares: An investment advisor hired by the reporting person inadvertently purchased / sold shares of IBKR as part of a broad based investment strategy.

F3 · balance_after: The reported amount also includes the shares sold by an investment advisor hired by the reporting person as part of a broad based investment strategy, as well as shares granted on December 31, 2016 under the 2007 Stock Incentive Plan, previously reported on Form 4 filed with the Securities Exchange Commission on January 4, 2017.

SEC source: 0001140361-17-019409 · doc1.xml · nonDerivative · entry 2

Peterffy Thomas · CIK 0001391405 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 311

F1 · shares: An investment advisor hired by the reporting person inadvertently purchased shares of IBKR as part of a broad based investment strategy.

SEC source: 0001140361-17-019409 · doc1.xml · nonDerivative · entry 1

Peterffy Thomas · CIK 0001391405 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 104

F1 · shares: An investment advisor hired by the reporting person inadvertently purchased shares of IBKR as part of a broad based investment strategy.

SEC source: 0001140361-17-000500 · doc1.xml · nonDerivative · entry 1

Galik Milan · CIK 0001391404 · Director · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 849,750

F1 · shares: This represents a grant of restricted stock that will vest 10% on 5/9/2017 and 15% on each of the first six anniversaries of 5/9/2017.

F1 · price: This represents a grant of restricted stock that will vest 10% on 5/9/2017 and 15% on each of the first six anniversaries of 5/9/2017.

F2 · balance_after: These shares of Class A Common Stock are owned directly by the reporting person and represent the aggregate number of shares of restricted stock from awards granted under the 2007 Stock Incentive Plan since its inception, less vested shares that were withheld for tax purposes, or sold previously.

SEC source: 0001140361-17-000485 · doc1.xml · nonDerivative · entry 1

Nemser Earl H · CIK 0001391400 · Director · Vice Chairman

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 101,043

F1 · shares: This represents a grant of restricted stock that will vest 10% on 5/9/2017 and 15% on each of the first six anniversaries of 5/9/2017.

F1 · price: This represents a grant of restricted stock that will vest 10% on 5/9/2017 and 15% on each of the first six anniversaries of 5/9/2017.

F2 · balance_after: These shares of Class A Common Stock are owned directly by the reporting person and represent the aggregate number of shares of restricted stock from awards granted under the 2007 Stock Incentive Plan since its inception, less vested shares that were withheld for tax purposes, or sold previously.

SEC source: 0001140361-17-000475 · doc1.xml · nonDerivative · entry 1

Frank Thomas AJ · CIK 0001391401 · Chief Information Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 329,445

F1 · shares: This represents a grant of restricted stock that will vest 10% on 5/9/2017 and 15% on each of the first six anniversaries of 5/9/2017.

F1 · price: This represents a grant of restricted stock that will vest 10% on 5/9/2017 and 15% on each of the first six anniversaries of 5/9/2017.

F2 · balance_after: These shares of Class A Common Stock are owned directly by the reporting person and represent the aggregate number of shares of restricted stock from awards granted under the 2007 Stock Incentive Plan since its inception, less vested shares that were withheld for tax purposes, or sold previously.

SEC source: 0001140361-17-000450 · doc1.xml · nonDerivative · entry 1

Brody Paul Jonathan · CIK 0001391403 · Director · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 643,613

F1 · shares: This represents a grant of restricted stock that will vest 10% on 5/9/2017 and 15% on each of the first six anniversaries of 5/9/2017.

F1 · price: This represents a grant of restricted stock that will vest 10% on 5/9/2017 and 15% on each of the first six anniversaries of 5/9/2017.

F2 · balance_after: These shares of Class A Common Stock are owned directly by the reporting person and represent the aggregate number of shares of restricted stock from awards granted under the 2007 Stock Incentive Plan since its inception, less vested shares that were withheld for tax purposes, or sold previously.

SEC source: 0001140361-17-000436 · doc1.xml · nonDerivative · entry 1

Mendonca Denis · CIK 0001665345 · Chief Accounting Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,192

F1 · shares: This represents a grant of restricted stock that will vest 10% on 5/9/2017 and 15% on each of the first six anniversaries of 5/9/2017.

F1 · price: This represents a grant of restricted stock that will vest 10% on 5/9/2017 and 15% on each of the first six anniversaries of 5/9/2017.

F2 · balance_after: These shares of Class A Common Stock are owned directly by the reporting person and represent the aggregate number of shares of restricted stock from awards granted under the 2007 Stock Incentive Plan since its inception, less vested shares that were withheld for tax purposes, or sold previously.

SEC source: 0001140361-17-020741 · doc1.xml · nonDerivative · entry 2

Galik Milan · CIK 0001391404 · Director · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 734,954

F1 · shares: An investment advisor hired by the reporting person inadvertently purchased / sold shares of IBKR as part of a broad based investment strategy.

F2 · balance_after: These shares of Class A Common Stock are owned directly by the reporting person and represent the aggregate number of shares of restricted stock from awards granted under the 2007 Stock Incentive Plan since its inception, less vested shares that were withheld for tax purposes, or sold previously. The reported amount also includes the shares inadvertently purchased by an investment advisor hired by the reporting person as part of a broad based investment strategy.

SEC source: 0001140361-17-020741 · doc1.xml · nonDerivative · entry 1

Galik Milan · CIK 0001391404 · Director · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 734,953

F1 · shares: An investment advisor hired by the reporting person inadvertently purchased / sold shares of IBKR as part of a broad based investment strategy.

F2 · balance_after: These shares of Class A Common Stock are owned directly by the reporting person and represent the aggregate number of shares of restricted stock from awards granted under the 2007 Stock Incentive Plan since its inception, less vested shares that were withheld for tax purposes, or sold previously. The reported amount also includes the shares inadvertently purchased by an investment advisor hired by the reporting person as part of a broad based investment strategy.