Atchinson Robert
- SEC CIK
- 0001403404
In the past year, 1 open-market sale filing worth $33.2M and no purchases.
Current role at each company
- PRAX Praxis Precision Medicines, Inc.10% Owneras of Oct 17, 2025
- SLDB Solid Biosciences Inc.10% Owneras of Feb 19, 2025
- ABEO Abeona Therapeutics Inc.10% Owneras of May 8, 2024
- GCMG GCM Grosvenor Inc.10% Owneras of May 10, 2023
- ABX Abacus Global Management, Inc.10% Owneras of Jan 24, 2023
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
- –
- 0 filings
- Sold
- $33.2M
- 1 filing
- Net
- −$33.2M
- Bought minus sold
- Companies
- 1
- With open-market trades
Trades
Every Form 4 that lists Atchinson Robert 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.
PRAX Praxis Precision Medicines, Inc.
10% Owner2 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Oct 17, 2025 (view filing)4:10 PM ET | Oct 16 | 1 day | Atchinson Robert and 2 others10% Owner | SSaleCommon Stock, $0.0001 par value per share ("Common Stock") | +12.6K | $90.00 | +$1.13M | +0.5%2.36M after | |
| Oct 17, 2025 (view filing)4:10 PM ET | Oct 16 | 1 day | Atchinson Robert and 2 others10% Owner | SSale | +301.3K | $106.42 | +$32.1M | +17.1%2.06M after | 9 lots |
SLDB Solid Biosciences Inc.
10% Owner1 trade
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Feb 19, 2025 (view filing)4:16 PM ET | Feb 18 | 1 day | Atchinson Robert and 2 others10% Owner | PPurchaseCommon Stock, $0.001 par value per share | +252.5K | $7.56 | +$1.91M | +6.3%4.25M after |
ABEO Abeona Therapeutics Inc.
10% Owner1 trade
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| May 8, 2024 (view filing)4:15 PM ET | May 7 | 1 day | Atchinson Robert and 2 others10% Owner | PPurchase | +2.95M | $4.07 | +$12.0M | –2.95M after | Derivative |
GCMG GCM Grosvenor Inc.
10% Owner20 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Jul 13, 2021 (view filing)3:36 PM ET | Nov 20, 2020 | 235 daysLate | Adage Capital Partners, L.P. and 4 others10% Owner | PPurchaseClass A Common Stock, $0.0001 par value Class A Common Stock | +100 | $9.31 | +$931 | 0.0%5.94M after | |
| Jul 13, 2021 (view filing)3:36 PM ET | Nov 25, 2020-Jan 7, 2021 | 230 daysLate | Adage Capital Partners, L.P. and 4 others10% Owner | PPurchaseClass A Common Stock | +112.4K | $11.91 | +$1.34M | +2.0%5.64M after | 9 lots |
| Jul 13, 2021 (view filing)3:36 PM ET | Dec 8, 2020-Jan 6, 2021 | 217 daysLate | Adage Capital Partners, L.P. and 4 others10% Owner | SSaleClass A Common Stock | −336.3K | $13.63 | −$4.58M | −5.6%5.64M after | 18 lots |
| Jul 13, 2021 (view filing)3:36 PM ET | Dec 9, 2020 | 216 daysLate | Adage Capital Partners, L.P. and 4 others10% Owner | PPurchaseClass A Common Stock | −24.0K | $14.02 | −$335.8K | −0.4%5.82M after | |
| Jul 13, 2021 (view filing)3:36 PM ET | Dec 10, 2020 | 215 daysLate | Adage Capital Partners, L.P. and 4 others10% Owner | SSaleClass A Common Stock | +50.0K | $14.02 | +$701.0K | +0.9%5.65M after | |
| Jul 13, 2021 (view filing)3:37 PM ET | Jan 12 | 182 daysLate | Adage Capital Partners, L.P. and 4 others10% Owner | SSaleClass A Common Stock, $0.0001 par value | −15.0K | $13.39 | −$200.8K | −0.3%5.63M after | |
| Jul 13, 2021 (view filing)3:37 PM ET | Jan 12-Feb 23 | 182 daysLate | Adage Capital Partners, L.P. and 4 others10% Owner | SSaleClass A Common Stock | −388.9K | $13.45 | −$5.23M | −6.9%5.28M after | 27 lots |
| Jul 13, 2021 (view filing)3:37 PM ET | Feb 22 | 141 daysLate | Adage Capital Partners, L.P. and 4 others10% Owner | PPurchaseClass A Common Stock | +46.0K | $12.79 | +$588.1K | +0.9%5.33M after | 2 lots |
| Jul 13, 2021 (view filing)3:39 PM ET | Feb 23 | 140 daysLate | Adage Capital Partners, L.P. and 4 others10% Owner | SSaleClass A Common Stock, $0.0001 par value | −395 | $13.26 | −$5.24K | 0.0%5.28M after | |
| Jul 13, 2021 (view filing)3:39 PM ET | Feb 24-May 10 | 139 daysLate | Adage Capital Partners, L.P. and 4 others10% Owner | SSaleClass A Common Stock | −567.1K | $13.08 | −$7.42M | −10.7%4.72M after | 27 lots |