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Zenas BioPharma, Inc.

ZBIO Net buying
CIK 0001953926 #2025 in the set updated 17 Sep 2026
Bought (12 mo)
$29.05M
out of their own pocket, the only kind of buying there is
Sold (12 mo)
$0.00
$0.00 on a plan · $0.00 straight out of an exercise
Sold at will
$0.00
0 of 0 sales
Net
+$29.05M
+$29.05M against sales at will

By person

10 insiders · 25 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
Fairmount Funds Management LLC entity
Director
$9.01M (2)
—
+$9.01M
2,359,025
3.62%
$39.82M
+24.6%
Lu Hongbo
Director
$7.15M (4)
—
+$7.15M
422,968
0.6490%
$7.14M
+668.3%
MOULDER LEON O JR
See Remarks
$6.53M (10)
—
+$6.53M
520,083
0.7980%
$8.78M
+1,815%
SR ONE CAPITAL MANAGEMENT, LLC entity
10% owner
$2.40M (2)
—
+$2.40M
1,917,895
2.94%
$32.37M
+7.1%
ENRIGHT PATRICK G
Director
$2.25M (2)
—
+$2.25M
1,844,659
2.83%
$31.14M
+6.8%
Nunn Jason Raleigh
Director
$1.20M (1)
—
+$1.20M
1,173,395
1.80%
$19.81M
+5.7%
Allen Patricia L
Director
$499.75K (4)
—
+$499.75K
19,860
0.0305%
$335.24K
—
Xiao Ting
Director
—
—
—
47,000
0.0721%
$793.36K
+27.0%
Fox Jennifer A.
See Remarks
—
—
—
1,592
0.0024%
$26.87K
—
Farmer Joseph L
See Remarks
—
—
—
974
0.0015%
$16.44K
—

Individual transactions

25
Insider
Date
Role
Action
Shares
Price
Amount
MOULDER LEON O JR
18 May 2026
Chief Executive Officer
Buy indirect
60,000
$16.88
$1.01M
MOULDER LEON O JR
29 Apr 2026
Chief Executive Officer
Buy indirect
35,000
$17.62
$616.70K
MOULDER LEON O JR
28 Apr 2026
Chief Executive Officer
Buy indirect
25,000
$18.02
$450.50K
Lu Hongbo
31 Mar 2026
Director
Buy indirect
75,000
$20.00
$1.50M
MOULDER LEON O JR
31 Mar 2026
Chief Executive Officer
Buy indirect
34,000
$19.31
$656.54K
Fairmount Funds Management LLC
31 Mar 2026
Director
Buy indirect
150,000
$20.00
$3.00M
Lu Hongbo
31 Mar 2026
Director
Buy indirect
3,768
$18.63
$70.20K
MOULDER LEON O JR
30 Mar 2026
Chief Executive Officer
Buy indirect
20,000
$18.23
$364.60K
Allen Patricia L
13 Feb 2026
Director
Buy
4,160
$26.36
$109.66K
Allen Patricia L
12 Feb 2026
Director
Buy
5,000
$26.50
$132.50K
Allen Patricia L
12 Feb 2026
Director
Buy
5,700
$24.34
$138.74K
Allen Patricia L
12 Feb 2026
Director
Buy
5,000
$23.77
$118.85K
Lu Hongbo
11 Feb 2026
Director
Buy indirect
25,985
$22.50
$584.66K
MOULDER LEON O JR
2 Feb 2026
Chief Executive Officer
Buy
57,000
$17.96
$1.02M
MOULDER LEON O JR
9 Jan 2026
Chief Executive Officer
Buy
20,000
$16.55
$331.00K
MOULDER LEON O JR
8 Jan 2026
Chief Executive Officer
Buy
30,000
$16.30
$489.00K
MOULDER LEON O JR
7 Jan 2026
Chief Executive Officer
Buy
50,000
$16.38
$819.00K
ENRIGHT PATRICK G
9 Oct 2025
Director
Buy
11,990
$20.85
$249.99K
ENRIGHT PATRICK G
9 Oct 2025
Director
Buy indirect
105,265
$19.00
$2.00M
SR ONE CAPITAL MANAGEMENT, LLC
9 Oct 2025
10% owner
Buy indirect
63,157
$19.00
$1.20M
SR ONE CAPITAL MANAGEMENT, LLC
9 Oct 2025
10% owner
Buy indirect
63,158
$19.00
$1.20M
Nunn Jason Raleigh
9 Oct 2025
Director
Buy indirect
63,158
$19.00
$1.20M
Lu Hongbo
7 Oct 2025
Director
Buy indirect
263,160
$19.00
$5.00M
Fairmount Funds Management LLC
7 Oct 2025
Director
Buy indirect
316,219
$19.00
$6.01M
MOULDER LEON O JR
7 Oct 2025
See Remarks
Buy indirect
36,928
$20.85
$769.95K

What was left out

Form 4 filings counted 27
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 3
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 0
Sales at will 0
Transactions with no price 0
Shares from compensation/vesting 2,566
History held since 16 Sep 2024