Leon O. Moulder 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
Award(A)Direct22.4K shares- - Jun 15, 2026ZBIO
Zenas BioPharma, Inc.
Award(A)DirectStock Option (Right to Buy)
500K shares- - May 18, 2026ZBIO
Zenas BioPharma, Inc.
Purchase(P)Indirect60K shares at avg. $16.88$1.0M - Apr 29, 2026ZBIO
Zenas BioPharma, Inc.
Purchase(P)Indirect35K shares at avg. $17.62$617K - Apr 28, 2026ZBIO
Zenas BioPharma, Inc.
Purchase(P)Indirect25K shares at avg. $18.02$451K - Feb 2, 2026ZBIO
Zenas BioPharma, Inc.
Purchase(P)Direct57K shares at avg. $17.96$1.0M - Jan 9, 2026ZBIO
Zenas BioPharma, Inc.
Purchase(P)Direct20K shares at avg. $16.55$331K - Jan 8, 2026ZBIO
Zenas BioPharma, Inc.
Purchase(P)Direct30K shares at avg. $16.30$489K - Jan 7, 2026ZBIO
Zenas BioPharma, Inc.
Purchase(P)Direct50K shares at avg. $16.38$819K - Oct 7, 2025ZBIO
Zenas BioPharma, Inc.
Purchase(P)Indirect36.9K shares at avg. $20.85$770K - Jun 18, 2025ZLAB
Zai Lab Ltd
Award(A)Direct10.8K shares- - Jun 10, 2025ZBIO
Zenas BioPharma, Inc.
Award(A)DirectStock Option (Right to Buy)
400K shares- - Feb 18, 2025ZBIO
Zenas BioPharma, Inc.
Purchase(P)Direct25K shares at avg. $6.67$167K - Dec 4, 2024ZBIO
Zenas BioPharma, Inc.
Purchase(P)Direct45K shares at avg. $9.98$449K - Dec 3, 2024ZBIO
Zenas BioPharma, Inc.
Purchase(P)Direct25K shares at avg. $10.76$269K - Nov 19, 2024ZBIO
Zenas BioPharma, Inc.
Purchase(P)Direct2.5K shares at avg. $14.57$36K - Nov 18, 2024ZBIO
Zenas BioPharma, Inc.
Purchase(P)Direct7.5K shares at avg. $15.00$113K - Sep 20, 2024ZBIO
Zenas BioPharma, Inc.
Purchase(P)Indirect2.4K shares at avg. $17.88$42K - Sep 20, 2024ZBIO
Zenas BioPharma, Inc.
Purchase(P)Indirect2.6K shares at avg. $18.97$50K - Sep 19, 2024ZBIO
Zenas BioPharma, Inc.
Purchase(P)Indirect5K shares at avg. $17.89$89K - Sep 18, 2024ZBIO
Zenas BioPharma, Inc.
Purchase(P)Indirect10K shares at avg. $17.91$179K - Sep 16, 2024ZBIO
Zenas BioPharma, Inc.
Conversion(C)Indirect372K shares- - Sep 16, 2024ZBIO
Zenas BioPharma, Inc.
Conversion(C)Indirect164.5K shares- - Sep 16, 2024ZBIO
Zenas BioPharma, Inc.
Conversion(C)Direct48.3K shares- - Sep 16, 2024ZBIO
Zenas BioPharma, Inc.
Conversion(C)Direct108.4K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Jun 17, 2026 |  ZLAB Zai Lab Ltd | Award(A) | 22,371 | - | $0 | Direct |
| Jun 15, 2026 |  ZBIO Zenas BioPharma, Inc. | Award(A) Stock Option (Right to Buy) | 500,000 | - | - | Direct |
| May 18, 2026 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 60,000 | $16.88 | $1,012,800 | Indirect |
| Apr 29, 2026 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 35,000 | $17.62 | $616,700 | Indirect |
| Apr 28, 2026 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 25,000 | $18.02 | $450,500 | Indirect |
| Feb 2, 2026 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 57,000 | $17.96 | $1,023,720 | Direct |
| Jan 9, 2026 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 20,000 | $16.55 | $331,000 | Direct |
| Jan 8, 2026 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 30,000 | $16.30 | $489,000 | Direct |
| Jan 7, 2026 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 50,000 | $16.38 | $819,000 | Direct |
| Oct 7, 2025 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 36,928 | $20.85 | $769,949 | Indirect |
| Jun 18, 2025 | ZLAB Zai Lab Ltd | Award(A) | 10,831 | - | - | Direct |
| Jun 10, 2025 | ZBIO Zenas BioPharma, Inc. | Award(A) Stock Option (Right to Buy) | 400,000 | - | - | Direct |
| Feb 18, 2025 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 25,000 | $6.67 | $166,750 | Direct |
| Dec 4, 2024 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 45,000 | $9.98 | $449,100 | Direct |
| Dec 3, 2024 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 25,000 | $10.76 | $269,000 | Direct |
| Nov 19, 2024 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 2,500 | $14.57 | $36,425 | Direct |
| Nov 18, 2024 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 7,500 | $15.00 | $112,500 | Direct |
| Sep 20, 2024 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 2,367 | $17.88 | $42,322 | Indirect |
| Sep 20, 2024 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 2,633 | $18.97 | $49,948 | Indirect |
| Sep 19, 2024 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 5,000 | $17.89 | $89,450 | Indirect |
| Sep 18, 2024 | ZBIO Zenas BioPharma, Inc. | Purchase(P) | 10,000 | $17.91 | $179,100 | Indirect |
| Sep 16, 2024 | ZBIO Zenas BioPharma, Inc. | Conversion(C) | 372,017 | - | $0 | Indirect |
| Sep 16, 2024 | ZBIO Zenas BioPharma, Inc. | Conversion(C) | 164,523 | - | $0 | Indirect |
| Sep 16, 2024 | ZBIO Zenas BioPharma, Inc. | Conversion(C) | 48,254 | - | $0 | Direct |
| Sep 16, 2024 | ZBIO Zenas BioPharma, Inc. | Conversion(C) | 108,381 | - | $0 | Direct |
1-25 of 26 transactions
About MOULDER LEON O JR
MOULDER LEON O JR (SEC CIK 0001228865) files insider reports with the SEC as Director of Zai Lab Ltd (ZLAB) and Director of Zenas BioPharma, Inc. (ZBIO).
Signal8 holds 16 ownership filings by MOULDER LEON O JR (1 Form 3, 15 Form 4), filed between Sep 12, 2024 and Jun 22, 2026. Those filings report 26 transactions, from Sep 12, 2024 to Jun 17, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on MOULDER LEON O JR's filings is in WALTHAM, MA.
Recent filings by MOULDER LEON O JR
- Jun 17, 2026: Grant or award of ZLAB shares (Form 4, code A).
- Jun 15, 2026: Grant or award of ZBIO derivative securities (Form 4, code A).
- May 18, 2026: Open-market purchase of ZBIO shares (Form 4, code P).
- Apr 29, 2026: Open-market purchase of ZBIO shares (Form 4, code P).
- Apr 28, 2026: Open-market purchase of ZBIO shares (Form 4, code P).
Other insiders filing for Zai Lab Ltd (ZLAB)
- Chen Yajing, Chief Financial Officer
- Lis William, Director
- GAYNOR RICHARD, Director
- Du Ying, Chairperson & CEO
- Edmondson Frazor Titus III, Chief Legal Officer
- Morrison Scott W, Director