MOULDER LEON O JR

Director · Officer · ZLAB, ZBIO

As of 2026-09-16, MOULDER LEON O JR has 15 Form 4 transactions on record across 2 companies — 12 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Pattern in the record: open-market purchases filed in February in multiple years since 2025 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.

Reconstructed holdings

Direct: $18.5MIndirect: $3.1M$21.6Mas of 2026-09-16
  • Direct $18.5M
  • Indirect $3.1M
ZBIOdirect500,000 sh$16.2M
ZBIOindirect96,928 sh$3.1M
ZLABdirect94,973 sh$2.3M

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

ZBIO · 13 trades
2026-06-15: Award / grant, 500,000 sh ($0)2026-05-18: Purchase, 60,000 sh ($1.0M)2026-04-29: Purchase, 35,000 sh ($617K)2026-04-28: Purchase, 25,000 sh ($451K)2026-03-31: Purchase, 34,000 sh ($657K)2026-03-30: Purchase, 20,000 sh ($365K)2026-02-02: Purchase, 57,000 sh ($1.0M)2026-01-09: Purchase, 20,000 sh ($331K)2026-01-08: Purchase, 30,000 sh ($489K)2026-01-07: Purchase, 50,000 sh ($819K)2025-10-07: Purchase, 36,928 sh ($770K)2025-06-10: Award / grant, 400,000 sh ($0)2025-02-18: Purchase, 25,000 sh ($167K)
ZLAB · 2 trades
2026-06-17: Award / grant, 22,371 sh ($0)2025-06-18: Award / grant, 10,831 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-05-18ZBIOPurchase60,000 @ $16.88$1.0M+162.5% of holding96,928Form 4
2026-04-29ZBIOPurchase35,000 @ $17.62$617K+2.0% of holding1,786,039Form 4
2026-04-28ZBIOPurchase25,000 @ $18.02$451K+1.4% of holding1,751,039Form 4
2026-03-31ZBIOPurchase34,000 @ $19.31$657K+2.0% of holding1,726,039Form 4
2026-03-30ZBIOPurchase20,000 @ $18.23$365K+1.2% of holding1,692,039Form 4
2026-02-02ZBIOPurchase57,000 @ $17.96$1.0M+15.6% of holding423,155Form 4
2026-01-09ZBIOPurchase20,000 @ $16.55$331K+5.8% of holding366,155Form 4
2026-01-08ZBIOPurchase30,000 @ $16.30$489K+9.5% of holding346,155Form 4
2026-01-07ZBIOPurchase50,000 @ $16.38$819K+18.8% of holding316,155Form 4
2025-10-07ZBIOPurchase36,928 @ $20.85$770Kownership Δ n/a36,928Form 4
2025-02-18ZBIOPurchase25,000 @ $6.67$167K+10.4% of holding266,155Form 4
4 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-06-17ZLABAward / grant22,37194,973Form 4
2026-06-15ZBIOAward / grant500,000500,000Form 4
2025-06-18ZLABAward / grant10,83172,602Form 4
2025-06-10ZBIOAward / grant400,000400,000Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.