MOULDER LEON O JR
SEC insider (Form 3/4/5 filer). CIK 0001228865. Director at Zai Lab Ltd (ZLAB) and 1 other issuer. 26 reported Form 4/5 transactions since Sep 2024; latest on Jun 17, 2026. Located in WALTHAM, MA.
Companies MOULDER LEON O JR has filed insider reports for
- Zai Lab Ltd (ZLAB): Director
- Zenas BioPharma, Inc. (ZBIO): Director, Officer, See Remarks
MOULDER LEON O JR
CIK: 0001228865
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (26 total)
- Jun 17, 2026ZLAB
Zai Lab Ltd
AwardDirect22.4K shares- - Jun 15, 2026ZBIO
Zenas BioPharma, Inc.
AwardDirectStock Option (Right to Buy)
500K shares- - May 18, 2026ZBIO
Zenas BioPharma, Inc.
PurchaseIndirect60K shares at avg. $16.88$1.0M - Apr 29, 2026ZBIO
Zenas BioPharma, Inc.
PurchaseIndirect35K shares at avg. $17.62$617K - Apr 28, 2026ZBIO
Zenas BioPharma, Inc.
PurchaseIndirect25K shares at avg. $18.02$451K - Feb 2, 2026ZBIO
Zenas BioPharma, Inc.
PurchaseDirect57K shares at avg. $17.96$1.0M - Jan 9, 2026ZBIO
Zenas BioPharma, Inc.
PurchaseDirect20K shares at avg. $16.55$331K - Jan 8, 2026ZBIO
Zenas BioPharma, Inc.
PurchaseDirect30K shares at avg. $16.30$489K - Jan 7, 2026ZBIO
Zenas BioPharma, Inc.
PurchaseDirect50K shares at avg. $16.38$819K - Oct 7, 2025ZBIO
Zenas BioPharma, Inc.
PurchaseIndirect36.9K shares at avg. $20.85$770K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Jun 17, 2026 |  ZLAB Zai Lab Ltd | Award | 22,371 | - | $0 | Direct |
| Jun 15, 2026 |  ZBIO Zenas BioPharma, Inc. | Award Stock Option (Right to Buy) | 500,000 | - | - | Direct |
| May 18, 2026 | ZBIO Zenas BioPharma, Inc. | Purchase | 60,000 | $16.88 | $1,012,800 | Indirect |
| Apr 29, 2026 | ZBIO Zenas BioPharma, Inc. | Purchase | 35,000 | $17.62 | $616,700 | Indirect |
| Apr 28, 2026 | ZBIO Zenas BioPharma, Inc. | Purchase | 25,000 | $18.02 | $450,500 | Indirect |
| Feb 2, 2026 | ZBIO Zenas BioPharma, Inc. | Purchase | 57,000 | $17.96 | $1,023,720 | Direct |
| Jan 9, 2026 | ZBIO Zenas BioPharma, Inc. | Purchase | 20,000 | $16.55 | $331,000 | Direct |
| Jan 8, 2026 | ZBIO Zenas BioPharma, Inc. | Purchase | 30,000 | $16.30 | $489,000 | Direct |
| Jan 7, 2026 | ZBIO Zenas BioPharma, Inc. | Purchase | 50,000 | $16.38 | $819,000 | Direct |
| Oct 7, 2025 | ZBIO Zenas BioPharma, Inc. | Purchase | 36,928 | $20.85 | $769,949 | Indirect |
1-10 of 26 transactions