George Simeon
- SEC CIK
- 0001595117
In the past year, 3 open-market purchase filings worth $22.4M and 1 sale filing worth $32.0K.
Current role at each company
- NKTX Nkarta, Inc.Directoras of Jun 11, 2026
- DSGN Design Therapeutics, Inc.Director, 10% Owneras of Jun 11, 2026
- CRSP CRISPR Therapeutics AGDirectoras of Jun 9, 2026
- ODTX Odyssey Therapeutics, Inc.10% Owneras of May 11, 2026
- AVLN Avalyn Pharma Inc.10% Owneras of May 1, 2026
Show 4 more companies
- ZBIO Zenas BioPharma, Inc.10% Owneras of Oct 14, 2025
- EFTR eFFECTOR Therapeutics, Inc.10% Owneras of Nov 29, 2023
- ACLX Arcellx, Inc.10% Owneras of May 15, 2023
- TPTX Turning Point Therapeutics, Inc.Directoras of Aug 17, 2022
Open-market trades in the past year
Open-market purchases (P) and sales (S) filed in the last 365 days, not counting derivative securities or duplicate filings. Values leave out price outliers.
- Bought
- $22.4M
- 3 filings
- Sold
- $32.0K
- 1 filing
- Net
- +$22.4M
- Bought minus sold
- Companies
- 3
- With open-market trades
Trades
Every Form 4 that lists George Simeon as a reporting owner, including filings made jointly with others, grouped by company. Each row adds up one type of transaction in one filing. Only open-market purchases (P) and sales (S) are shown by default.
ODTX Odyssey Therapeutics, Inc.
10% Owner2 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| May 11, 2026 (view filing)9:11 PM ET | May 11 | Same day | George Simeon and 1 other10% Owner | SSale | −1.78K | $18.00 | −$32.0K | −0.2%814.9K after | 3 lots |
| May 11, 2026 (view filing)9:11 PM ET | May 11 | Same day | George Simeon and 1 other10% Owner | PPurchase | +555.6K | $18.00 | +$10.0M | +121.0%1.01M after | 3 lots |
AVLN Avalyn Pharma Inc.
10% Owner1 trade
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| May 1, 2026 (view filing)6:46 PM ET | May 1 | Same day | George Simeon and 1 other10% Owner | PPurchase | +555.6K | $18.00 | +$10.0M | +98.1%1.12M after | 2 lots |
ZBIO Zenas BioPharma, Inc.
10% Owner2 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Oct 14, 2025 (view filing)5:14 PM ET | Oct 9 | 5 days | George Simeon and 1 other10% Owner | PPurchase | +126.3K | $19.00 | +$2.40M | +7.1%1.92M after | 2 lots |
| Sep 16, 2024 (view filing)8:51 PM ET | Sep 16 | Same day | George Simeon and 1 other10% Owner | PPurchase | +2.24M | $17.00 | +$38.0M | New position1.11M after | 3 lots |
CRSP CRISPR Therapeutics AG
Director1 trade
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Jul 17, 2025 (view filing) | Jul 16 | 1 day | George SimeonDirector | PPurchase | +989.8K | $52.03 | +$51.5M | +133.7%1.73M after | 3 lots |
NKTX Nkarta, Inc.
Director2 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Mar 28, 2024 (view filing) | Mar 27 | 1 day | George SimeonDirector | PPurchase | +2.00M | $10.00 | +$20.0M | New position451.7K after | 2 lots |
| Apr 29, 2022 (view filing) | Apr 28 | 1 day | George SimeonDirector | PPurchase | +1.33M | $15.00 | +$20.0M | New position666.7K after | 2 lots |
EFTR eFFECTOR Therapeutics, Inc.
10% Owner1 trade
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Nov 29, 2023 (view filing)5:07 PM ET | Nov 27 | 2 days | George Simeon and 5 others10% Owner | SSale | −609.2K | $0.6065 | −$369.5K | −25.1%1.82M after | 2 lots |
ACLX Arcellx, Inc.
10% Owner2 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| May 15, 2023 (view filing)6:16 PM ET | May 11 | 4 days | George Simeon and 5 others10% Owner | SSale | −1.01M | $45.01 | −$45.6M | −37.9%1.66M after | 4 lots |
| Feb 10, 2022 (view filing)8:41 AM ET | Feb 8 | 2 days | George Simeon and 5 others10% Owner | PPurchase | +1.67M | $15.00 | +$25.0M | +454.7%2.03M after | 2 lotsDuplicate filing |
DSGN Design Therapeutics, Inc.
Director, 10% Owner1 trade
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Dec 20, 2022 (view filing) | Dec 16-20 | 4 days | George SimeonDirector, 10% Owner | PPurchase | +900.0K | $8.41 | +$7.57M | +16.0%6.53M after | 3 lots |