MOULDER LEON O JR
Chief Executive Officer
PurchaseAlert
- Shares
- 60,000
- Price
- $16.88
- Value
- $1,012,800
SEC EDGAR · Forms 3/4/5Updated through Oct 30, 2026•30 filings
ZBIO
Zenas BioPharma, Inc.
No net buying or selling imbalance over the last 3 months
No net buyers or sellers account for the net balance. There is no cluster of three distinct buyers within 30 days. We found 9 CEO/CFO purchases over 12 months.
How to read this signal
Only open-market P purchases and S sales count toward the signal. Vesting, options, taxes and gifts remain in the source data but do not trigger alerts. Rule 10b5-1 trades are shown as informational.
3-month balance
$0.00
0 buyers · 0 sellers
12-month purchases
$11,418,466
7 distinct insiders
12-month sales
$0.00
0 distinct insiders
Highlighted alerts
26
0 Rule 10b5-1 trades treated as informational
Buying cluster · 30 days
Fewer than three distinct buyers
CEO/CFO purchases · 12 months
9 executive purchases found
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Form 4 raw → Raspberry
The value is in what we do not call a signal.
The SEC XML stores every transaction. Raspberry keeps that evidence, reads the footnotes and separates voluntary open-market activity from vesting, option exercises, gifts, tax withholding, stock purchase and dividend reinvestment plans and pre-programmed 10b5-1 trades.
39
Raw transactions
Everything returned by the filing
26
Voluntary view
P/S trades after deterministic checks
13
Administrative noise
Stored, never alerted
0
10b5-1
Shown as informational
SEC ownership XML facts
- Code
- A
- Shares
- 37,000
- Price
- $0.00
- Footnotes
- 1
The option vests in equal annual installments over three years beginning on September 1, 2027, the first anniversary of the vesting commencement date, subject to continued service.
Recent transactions
Voluntary purchases and sales; administrative noise stays hidden.
MOULDER LEON O JR
Chief Executive Officer
PurchaseAlert
- Shares
- 35,000
- Price
- $17.62
- Value
- $616,700
MOULDER LEON O JR
Chief Executive Officer
PurchaseAlert
- Shares
- 25,000
- Price
- $18.02
- Value
- $450,500
Lu Hongbo
Director
PurchaseAlert
- Shares
- 3,768
- Price
- $18.63
- Value
- $70,198
Fairmount Funds Management LLC
Director
PurchaseAlert
- Shares
- 150,000
- Price
- $20.00
- Value
- $3,000,000
MOULDER LEON O JR
Chief Executive Officer
PurchaseAlert
- Shares
- 34,000
- Price
- $19.31
- Value
- $656,540
Lu Hongbo
Director
PurchaseAlert
- Shares
- 75,000
- Price
- $20.00
- Value
- $1,500,000
MOULDER LEON O JR
Chief Executive Officer
PurchaseAlert
- Shares
- 20,000
- Price
- $18.23
- Value
- $364,600
Allen Patricia L
Director
PurchaseAlert
- Shares
- 4,160
- Price
- $26.36
- Value
- $109,658
Allen Patricia L
Director
PurchaseAlert
- Shares
- 5,000
- Price
- $26.50
- Value
- $132,500
Allen Patricia L
Director
PurchaseAlert
- Shares
- 5,700
- Price
- $24.34
- Value
- $138,738
Allen Patricia L
Director
PurchaseAlert
- Shares
- 5,000
- Price
- $23.77
- Value
- $118,850
Lu Hongbo
Director
PurchaseAlert
- Shares
- 25,985
- Price
- $22.50
- Value
- $584,663
MOULDER LEON O JR
Chief Executive Officer
PurchaseAlert
- Shares
- 57,000
- Price
- $17.96
- Value
- $1,023,720
MOULDER LEON O JR
Chief Executive Officer
PurchaseAlert
- Shares
- 20,000
- Price
- $16.55
- Value
- $331,000
MOULDER LEON O JR
Chief Executive Officer
PurchaseAlert
- Shares
- 30,000
- Price
- $16.30
- Value
- $489,000
MOULDER LEON O JR
Chief Executive Officer
PurchaseAlert
- Shares
- 50,000
- Price
- $16.38
- Value
- $819,000
Nunn Jason Raleigh
Director
PurchaseAlert
- Shares
- 63,158
- Price
- $19.00
- Value
- $1,200,002
SR ONE CAPITAL MANAGEMENT, LLC
10% owner
PurchaseAlert
- Shares
- 63,157
- Price
- $19.00
- Value
- $1,199,983
SR ONE CAPITAL MANAGEMENT, LLC
10% owner
PurchaseAlert
- Shares
- 63,158
- Price
- $19.00
- Value
- $1,200,002
ENRIGHT PATRICK G
Director
PurchaseAlert
- Shares
- 11,990
- Price
- $20.85
- Value
- $249,992
ENRIGHT PATRICK G
Director
PurchaseAlert
- Shares
- 105,265
- Price
- $19.00
- Value
- $2,000,035
MOULDER LEON O JR
See Remarks
PurchaseAlert
- Shares
- 36,928
- Price
- $20.85
- Value
- $769,949
Fairmount Funds Management LLC
Director
PurchaseAlert
- Shares
- 316,219
- Price
- $19.00
- Value
- $6,008,161
Lu Hongbo
Director
PurchaseAlert
- Shares
- 263,160
- Price
- $19.00
- Value
- $5,000,040
Lu Hongbo
Director
PurchaseAlert
- Shares
- 58,823
- Price
- $17.00
- Value
- $999,991
| Date | Insider | Transaction | Shares | Price | Value | Reading |
|---|---|---|---|---|---|---|
| May 18, 2026 | MOULDER LEON O JR Chief Executive Officer | Purchase | 60,000 | $16.88 | $1,012,800 | |
| Apr 29, 2026 | MOULDER LEON O JR Chief Executive Officer | Purchase | 35,000 | $17.62 | $616,700 | |
| Apr 28, 2026 | MOULDER LEON O JR Chief Executive Officer | Purchase | 25,000 | $18.02 | $450,500 | |
| Mar 31, 2026 | Lu Hongbo Director | Purchase | 3,768 | $18.63 | $70,198 | |
| Mar 31, 2026 | Fairmount Funds Management LLC Director | Purchase | 150,000 | $20.00 | $3,000,000 | |
| Mar 31, 2026 | MOULDER LEON O JR Chief Executive Officer | Purchase | 34,000 | $19.31 | $656,540 | |
| Mar 31, 2026 | Lu Hongbo Director | Purchase | 75,000 | $20.00 | $1,500,000 | |
| Mar 30, 2026 | MOULDER LEON O JR Chief Executive Officer | Purchase | 20,000 | $18.23 | $364,600 | |
| Feb 13, 2026 | Allen Patricia L Director | Purchase | 4,160 | $26.36 | $109,658 | |
| Feb 12, 2026 | Allen Patricia L Director | Purchase | 5,000 | $26.50 | $132,500 | |
| Feb 12, 2026 | Allen Patricia L Director | Purchase | 5,700 | $24.34 | $138,738 | |
| Feb 12, 2026 | Allen Patricia L Director | Purchase | 5,000 | $23.77 | $118,850 | |
| Feb 11, 2026 | Lu Hongbo Director | Purchase | 25,985 | $22.50 | $584,663 | |
| Feb 02, 2026 | MOULDER LEON O JR Chief Executive Officer | Purchase | 57,000 | $17.96 | $1,023,720 | |
| Jan 09, 2026 | MOULDER LEON O JR Chief Executive Officer | Purchase | 20,000 | $16.55 | $331,000 | |
| Jan 08, 2026 | MOULDER LEON O JR Chief Executive Officer | Purchase | 30,000 | $16.30 | $489,000 | |
| Jan 07, 2026 | MOULDER LEON O JR Chief Executive Officer | Purchase | 50,000 | $16.38 | $819,000 | |
| Oct 09, 2025 | Nunn Jason Raleigh Director | Purchase | 63,158 | $19.00 | $1,200,002 | |
| Oct 09, 2025 | SR ONE CAPITAL MANAGEMENT, LLC 10% owner | Purchase | 63,157 | $19.00 | $1,199,983 | |
| Oct 09, 2025 | SR ONE CAPITAL MANAGEMENT, LLC 10% owner | Purchase | 63,158 | $19.00 | $1,200,002 | |
| Oct 09, 2025 | ENRIGHT PATRICK G Director | Purchase | 11,990 | $20.85 | $249,992 | |
| Oct 09, 2025 | ENRIGHT PATRICK G Director | Purchase | 105,265 | $19.00 | $2,000,035 | |
| Oct 07, 2025 | MOULDER LEON O JR See Remarks | Purchase | 36,928 | $20.85 | $769,949 | |
| Oct 07, 2025 | Fairmount Funds Management LLC Director | Purchase | 316,219 | $19.00 | $6,008,161 | |
| Oct 07, 2025 | Lu Hongbo Director | Purchase | 263,160 | $19.00 | $5,000,040 | |
| Sep 13, 2024 | Lu Hongbo Director | Purchase | 58,823 | $17.00 | $999,991 |
“Alert” means a voluntary, unscheduled transaction according to the filing; it is not an investment recommendation. Official source: SEC EDGAR.