Interactive Brokers (IBKR): Chair sold ~$13K

~$13K

Approx. value · 200 sh @ $67.20

454K

Holds after · shares reported

Traded

Aug 13, 2025

Filed

Aug 14, 2025

The story around this disclosure

Every dated public record OQRO holds about the company from 60 days before to 120 days after, oldest first. It shows what was going on; none of it is a stated reason for the trade.

1. Jun 17, 2025Congress · 1 personMembers of Congress: 2 purchases
2. Jun 24, 2025Congress · 1 personMembers of Congress: 2 sales
3. Jul 28, 2025InsiderChair sold ~$6.6K of IBKR shares in the open market
4. Jul 30, 2025Insider · 1 personInsiders: 2 sales (~$2.6M)
5. Jul 31, 2025Insider · 1 personInsiders: 2 sales (~$970K)
6. Aug 1, 2025Insider · 1 personInsiders: 4 sales (~$824K)
7. Aug 4, 2025InsiderChair sold ~$829K of IBKR shares in the open market
8. Aug 5, 2025Insider · 1 personInsiders: 2 sales (~$819K)
9. Aug 6, 2025Insider · 1 personInsiders: 2 sales (~$815K)
10. Aug 7, 2025Insider · 1 personInsiders: 2 sales (~$821K)
11. Aug 8, 2025Insider · 1 personInsiders: 2 sales (~$843K)
12. Aug 11, 2025InsiderChair sold ~$849K of IBKR shares in the open market
13. Aug 12, 2025Insider · 1 personInsiders: 2 sales (~$13.1M)
14. Aug 13, 2025 · this disclosureInsiderChair sold ~$13K of IBKR shares in the open market

What came next

1. Aug 13, 2025Insider · 1 personInsiders: 4 sales (~$480K)
2. Aug 13, 2025Congress · 1 personMembers of Congress: 2 purchases
3. Aug 14, 2025Insider · 1 personInsiders: 2 sales (~$3.4M)
4. Sep 8, 20255% stakeThe Vanguard Group reported a passive stake (13G) of 11.4%
5. Sep 9, 2025Insider · 1 personInsiders: 2 sales (~$6.7M)
6. Sep 10, 2025Insider · Their largest sale since 2013CFO sold ~$6.56M of IBKR shares in the open market
7. Sep 11, 2025Insider · 1 personInsiders: 2 sales (~$7.1M)
8. Sep 12, 2025Insider · 1 personInsiders: 2 sales (~$6.2M)
9. Sep 15, 2025Insider · 1 personInsiders: 3 sales (~$6.1M)
10. Sep 16, 2025Insider · 1 personInsiders: 2 sales (~$6.2M)
11. Sep 17, 2025Insider · 1 personInsiders: 2 sales (~$6.6M)
12. Sep 18, 2025Insider · 1 personInsiders: 3 sales (~$7.6M)
13. Sep 19, 2025InsiderCFO sold ~$448K of IBKR shares in the open market
14. Sep 23, 2025Insider · 1 personInsiders: 2 sales (~$1.2M)
15. Sep 24, 2025Insider · 1 personInsiders: 2 sales (~$933K)
16. Sep 25, 2025Insider · 1 personInsiders: 3 sales (~$927K)
17. Sep 26, 2025Insider · 1 personInsiders: 2 sales (~$1.1M)
18. Oct 14, 2025CongressDisclosed sale of IBKR — reported range $1,001 - $15,000
19. Oct 15, 2025Court · District Court, S.D. New YorkSecurities lawsuit filed: XDOOD LLC v. Interactive Brokers Group, Inc.
20. Oct 16, 2025Company filing · Form 8-K · ResultsReported its results

How to read SEC Form 4

Form 4 is the filing that officers, directors and owners of more than 10% of a US-listed company must send to the SEC within two business days after they buy, sell or otherwise change their holding of the company's stock.

Full guide: What is an SEC Form 4?

What else is on file for Interactive Brokers

For Interactive Brokers, OQRO holds 4 insider filings (SEC Form 4 or Form 144) and 1 fund holdings report (13F) dated in the last 90 days.

These are records OQRO holds, counted by their date, not a measure of how much trading took place. Routine paperwork such as option exercises and tax withholding is left out. Everything for the company is on its IBKR page.

Other recent filings by Earl H Nemser, Vice Chairman

• SEC Form 4 at Interactive Brokers (IBKR)Jan 28, 2026
• SEC Form 4 at Interactive Brokers (IBKR)Jan 28, 2026
• SEC Form 4 at Interactive Brokers (IBKR)Jan 28, 2026
• SEC Form 4 at Interactive Brokers (IBKR)Jan 28, 2026
• SEC Form 4 at Interactive Brokers (IBKR)Jan 28, 2026

The full history of Earl H Nemser, Vice Chairman is on the profile page.

How this filing works

• SEC Form 4
• Open-market purchase
• Rule 10b5-1 trading plans

Other disclosures at Interactive Brokers

• SEC Form 13F-HRNov 13, 2026
• SEC Form 4Nov 3, 2026
• SEC Form 4Oct 29, 2026
• SEC Form 4Oct 6, 2026
• SEC Form 4Sep 2, 2026
• SEC Form 13F-HRAug 14, 2026

Everything OQRO holds on this company is on its IBKR page.