Transactions
13
Insider / Interactive Brokers Group, Inc.
Nemser Earl H
Vice Chairman at Interactive Brokers Group, Inc.
- Ticker
- IBKR
- First filing on record
- January 7, 2026
- Latest trade on record
- July 31, 2026
- SEC filings
- EDGAR ↗
Nemser Earl H, Vice Chairman at Interactive Brokers Group, Inc., has disclosed 13 transactions in IBKR since January 7, 2026: 0 purchases (0 open-market buys) and 9 sales, worth about $103.4M at the reported prices. The latest was filed August 4, 2026, 4 days after the trade; 4 filings were late against the 2-business-day Form 4 deadline.
Open-market buys
0
Sales
9
Avg. disclosure lag
6.2d
Trading in charts
Trade timeline
When does this person trade, how big, and in which direction? Every trade in the last 12 months.
Bought (above the line)Sold (below the line)Other transaction
In the last 12 months Nemser Earl H made no purchases and 9 sales worth $33M, plus 4 other transactions. Dot size is the dollar amount.
Portfolio mix
Which stocks does this person trade most? Tile size is dollars traded, all time on record.
Nemser Earl H has traded 1 stock on record; the largest by dollars is IBKR.
Reporting lag
Does this person report on time? One bar per filing against the Form 4 deadline.
On timeLate
3 of 6 filings on record were reported after the Form 4 deadline (two business days, counted here as 4 calendar days).
What kind of transactions
Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.
| Code | Meaning | Rows | Shares | Value |
|---|---|---|---|---|
| S | Open-market sale | 8 | 400,000 | $30.7M |
| A | Grant or award | 4 | 827,586 | $70.8M |
| F | Shares withheld for tax | 1 | 22,486 | $1.9M |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 11 | 0 | 9 · $32.6M |
| 2025 | 2 | 0 | 0 |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| IBKR | Other A | July 31, 2026 | August 4, 2026 | 4d | 803,568 | $88 | $70.7M | indirect | Form 4 ↗ | |
| IBKR | Sell F | May 8, 2026 | May 28, 2026 | 20d | 22,486 | $84 | $1.9M | late | Form 4 ↗ | |
| IBKR | Sell S | January 27, 2026 | January 28, 2026 | 1d | 20,469 | $76 | $1.6M | indirect | Form 4 ↗ | |
| IBKR | Sell S | January 27, 2026 | January 28, 2026 | 1d | 39,731 | $75 | $3.0M | indirect | Form 4 ↗ | |
| IBKR | Sell S | January 26, 2026 | January 28, 2026 | 2d | 3,101 | $78 | $242K | indirect | Form 4 ↗ | |
| IBKR | Sell S | January 26, 2026 | January 28, 2026 | 2d | 30,817 | $77 | $2.4M | indirect | Form 4 ↗ | |
| IBKR | Sell S | January 26, 2026 | January 28, 2026 | 2d | 60,882 | $76 | $4.6M | indirect | Form 4 ↗ | |
| IBKR | Sell S | January 23, 2026 | January 26, 2026 | 3d | 60,065 | $78 | $4.7M | indirect | Form 4 ↗ | |
| IBKR | Sell S | January 23, 2026 | January 26, 2026 | 3d | 84,935 | $78 | $6.6M | indirect | Form 4 ↗ | |
| IBKR | Sell S | January 22, 2026 | January 26, 2026 | 4d | 100,000 | $77 | $7.7M | indirect | Form 4 ↗ | |
| IBKR | Other A | January 1, 2026 | January 26, 2026 | 25d | 389 | $64 | $25K | late | Form 4 ↗ | |
| IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 389 | $64 | $25K | late | Form 4 ↗ | |
| IBKR | Other A | December 31, 2025 | January 7, 2026 | 7d | 23,240 | — | — | late | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| August 4, 2026 | Form 4 | 0001381197-26-000143 | 1 | published | EDGAR ↗ |
| May 28, 2026 | Form 4 | 0001381197-26-000104 | 1 | published | EDGAR ↗ |
| January 28, 2026 | Form 4 | 0001381197-26-000058 | 5 | published | EDGAR ↗ |
| January 26, 2026 | Form 4 | 0001381197-26-000052 | 1 | published | EDGAR ↗ |
| January 26, 2026 | Form 4 | 0001381197-26-000056 | 3 | published | EDGAR ↗ |
| January 7, 2026 | Form 4 | 0001381197-26-000027 | 2 | published | EDGAR ↗ |
Other insiders at Interactive Brokers Group, Inc.
- Conkling Lori A Director 13 rows
- Brody Paul Jonathan Chief Financial Officer 9 rows
- Harris Lawrence E Director 8 rows
- Galik Milan Chief Executive Officer 5 rows
- Bright Jill Director 3 rows
- Repetto Richard H Director 3 rows
- Frank Thomas AJ Executive Vice President 2 rows
- Mendonca Denis Chief Accounting Officer 2 rows
- Peterffy William Director 2 rows
- Yuen Nicole Director 2 rows
Everyone on file, with contracts and lobbying under the company's name: Interactive Brokers Group, Inc..
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 6 | 13 | January 7, 2026 | August 4, 2026 | Form 4 list on EDGAR |
Site built October 27, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.
Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.