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Zenas BioPharma, Inc.

ZBIO Net buying
CIK 0001953926 #2025 in the set updated 17 Sep 2026
Bought (120 mo)
$113.10M
out of their own pocket, the only kind of buying there is
Sold (120 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
+$113.10M
+$113.10M against sales at will

By person

12 insiders · 45 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
SR ONE CAPITAL MANAGEMENT, LLC entity
10% owner
$40.40M (5)
—
+$40.40M
1,917,895
2.94%
$32.37M
—
Nunn Jason Raleigh
Director
$16.20M (3)
—
+$16.20M
1,173,395
1.80%
$19.81M
—
Enavate Sciences GP, LLC entity
10% owner
$15.00M (1)
—
+$15.00M
3,761,359
5.77%
$63.49M
—
Fairmount Funds Management LLC entity
Director
$14.11M (3)
—
+$14.11M
2,359,025
3.62%
$39.82M
+719.3%
ENRIGHT PATRICK G
Director
$9.73M (3)
—
+$9.73M
1,844,659
2.83%
$31.14M
—
Lu Hongbo
Director
$9.15M (6)
—
+$9.15M
422,968
0.6490%
$7.14M
—
MOULDER LEON O JR
See Remarks
$7.93M (19)
—
+$7.93M
520,083
0.7980%
$8.78M
—
Allen Patricia L
Director
$499.75K (4)
—
+$499.75K
19,860
0.0305%
$335.24K
—
Xiao Ting
Director
$77.60K (1)
—
+$77.60K
47,000
0.0721%
$793.36K
+27.0%
Wellington Biomedical Innovation Master Investors (Cayman) I L.P.
10% owner
—
—
—
801,624
1.23%
$13.53M
—
Fox Jennifer A.
See Remarks
—
—
—
1,592
0.0024%
$26.87K
—
Farmer Joseph L
See Remarks
—
—
—
974
0.0015%
$16.44K
—

Individual transactions

45
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
MOULDER LEON O JR
18 Feb 2025
Chief Executive Officer
Buy
25,000
$6.67
$166.75K
Xiao Ting
7 Feb 2025
Director
Buy
10,000
$7.76
$77.60K
MOULDER LEON O JR
4 Dec 2024
Chief Executive Officer
Buy
45,000
$9.98
$449.10K
MOULDER LEON O JR
3 Dec 2024
Chief Executive Officer
Buy
25,000
$10.76
$269.00K
MOULDER LEON O JR
19 Nov 2024
Chief Executive Officer
Buy
2,500
$14.57
$36.43K
MOULDER LEON O JR
18 Nov 2024
Chief Executive Officer
Buy
7,500
$15.00
$112.50K
MOULDER LEON O JR
20 Sep 2024
Chief Executive Officer
Buy indirect
2,633
$18.97
$49.95K
MOULDER LEON O JR
20 Sep 2024
Chief Executive Officer
Buy indirect
2,367
$17.88
$42.32K
MOULDER LEON O JR
19 Sep 2024
Chief Executive Officer
Buy indirect
5,000
$17.89
$89.45K
MOULDER LEON O JR
18 Sep 2024
Chief Executive Officer
Buy indirect
10,000
$17.91
$179.10K
SR ONE CAPITAL MANAGEMENT, LLC
16 Sep 2024
10% owner
Buy indirect
441,176
$17.00
$7.50M
SR ONE CAPITAL MANAGEMENT, LLC
16 Sep 2024
10% owner
Buy indirect
1,352,942
$17.00
$23.00M
SR ONE CAPITAL MANAGEMENT, LLC
16 Sep 2024
10% owner
Buy indirect
441,176
$17.00
$7.50M
Fairmount Funds Management LLC
16 Sep 2024
Director
Buy indirect
300,000
$17.00
$5.10M
Nunn Jason Raleigh
16 Sep 2024
Director
Buy indirect
441,176
$17.00
$7.50M
Nunn Jason Raleigh
16 Sep 2024
Director
Buy indirect
441,176
$17.00
$7.50M
ENRIGHT PATRICK G
16 Sep 2024
Director
Buy indirect
440,000
$17.00
$7.48M
Enavate Sciences GP, LLC
16 Sep 2024
10% owner
Buy indirect
882,353
$17.00
$15.00M
Lu Hongbo
13 Sep 2024
Director
Buy indirect
58,823
$17.00
$999.99K
Lu Hongbo
13 Sep 2024
Director
Buy indirect
58,823
$17.00
$999.99K
Show all 45 transactions →

What was left out

Form 4 filings counted 62
Amendments (4/A) skipped 3
Filings about a different issuer 0
Unreadable filings 0
Joint filings 7
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 12,593,890
History held since 16 Sep 2024