Plain Henry A JR
- SEC CIK
- 0001384286
No open-market purchases or sales filed in the past year.
Current role at each company
- SI Shoulder Innovations, Inc.Other: Former 10% Owneras of Aug 5, 2025
- ALXO Alx Oncology Holdings Inc10% Owneras of Dec 15, 2021
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
- –
- 0 filings
- Net
- –
- Bought minus sold
- Companies
- 0
- With open-market trades
Trades
Every Form 4 that lists Plain Henry A JR 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.
SI Shoulder Innovations, Inc.
Other: Former 10% Owner1 trade
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Aug 5, 2025 (view filing)4:05 PM ET | Aug 1 | 4 days | George Jean and 4 othersOther: Former 10% Owner | PPurchase | +266.7K | $15.00 | +$4.00M | +16.5%1.89M after | Duplicate filing |
ALXO Alx Oncology Holdings Inc
10% Owner2 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Dec 15, 2021 (view filing)9:03 PM ET | Dec 13 | 2 days | George Jean and 8 others10% Owner | SSale | −48.4K | $26.61 | −$1.29M | −14.5%286.0K after | 12 lots |
| Dec 10, 2021 (view filing)7:51 PM ET | Dec 8-10 | 2 days | George Jean and 8 others10% Owner | SSale | −145.6K | $32.26 | −$4.70M | −33.3%291.8K after | 16 lotsDuplicate filing |