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Rallybio Corp

RLYB Net buying
CIK 0001739410 #4404 in the set updated 17 Sep 2026
Bought (120 mo)
$43.57M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$13.47M
$0.00 on a plan · $0.00 straight out of an exercise
Sold at will
$13.47M
15 of 15 sales
Net
+$30.09M
+$30.09M against sales at will

By person

14 insiders · 47 transactions
Insider
Role
Bought
Sold
Net
Holding
Worth
Change
VIKING GLOBAL INVESTORS LP entity
10% owner
$10.48M (1)
+$10.48M
4,194,777
$57.89M
Hopfner Robert Lorne
Director
$7.50M (1)
+$7.50M
2,267,411
$31.29M
ADAR1 Capital Management, LLC entity
10% owner
$4.23M (14)
+$4.23M
926,352
$12.78M
+48.5%
HUNT RONALD
Director
$4.00M (2)
+$4.00M
2,301,603
$31.76M
5AM Opportunities I, L.P.
10% owner
$8.00M (1)
$5.92M (6)
+$2.08M
5,263,595
$72.64M
+3.0%
PARMAR KUSH
Director
$8.00M (1)
$6.74M (7)
+$1.26M
6,569,693
$90.66M
+123.5%
SHANNON TIMOTHY M
Director
$1,000.00K (1)
+$1,000.00K
2,409,712
$33.25M
5AM Partners V, LLC entity
10% owner
$820.00K (1)
−$820.00K
2,378,969
$32.83M
−4.0%
Fryer Jeffrey M
See Remarks
$130.37K (4)
+$130.37K
47,048
$649.26K
MACKAY MARTIN
Director
$103.47K (2)
+$103.47K
719,126
$9.92M
Uden Stephen
Chief Executive Officer
$98.50K (3)
+$98.50K
719,127
$9.92M
Lieber Jonathan I
Chief Financial Officer
$26.05K (1)
$3.99K (1)
+$22.06K
4,115
$56.79K
FMR LLC entity
See Remark 1
1,694,388
$23.38M
Boudreau Helen M
Director
6,542
$90.28K
+119.5%

No percentages here. This company's share count has moved by a factor of 8.0 over the window, from 5,289,675 to 42,243,774 shares. A split, a merger or a large issue changes what the company is, and a holding measured at one point in that run is not a fraction of it at another.

Insider
Date
Role
Action
Shares
Price
Amount
ADAR1 Capital Management, LLC
19 May 2026
10% owner
Buy indirect
200
$13.80
$2.76K
ADAR1 Capital Management, LLC
19 May 2026
10% owner
Buy indirect
10,000
$13.98
$139.82K
ADAR1 Capital Management, LLC
18 May 2026
10% owner
Buy indirect
6,009
$13.98
$83.98K
ADAR1 Capital Management, LLC
15 May 2026
10% owner
Buy indirect
200
$13.95
$2.79K
ADAR1 Capital Management, LLC
15 May 2026
10% owner
Buy indirect
100
$13.80
$1.38K
ADAR1 Capital Management, LLC
13 May 2026
10% owner
Buy indirect
75,178
$14.00
$1.05M
ADAR1 Capital Management, LLC
13 May 2026
10% owner
Buy indirect
4,081
$13.80
$56.31K
ADAR1 Capital Management, LLC
12 May 2026
10% owner
Buy indirect
800
$13.83
$11.06K
ADAR1 Capital Management, LLC
11 May 2026
10% owner
Buy indirect
19,900
$14.00
$278.60K
ADAR1 Capital Management, LLC
11 May 2026
10% owner
Buy indirect
25,000
$14.00
$350.00K
ADAR1 Capital Management, LLC
11 May 2026
10% owner
Buy indirect
5,100
$14.00
$71.39K
ADAR1 Capital Management, LLC
5 May 2026
10% owner
Buy indirect
35,101
$14.00
$491.26K
ADAR1 Capital Management, LLC
4 May 2026
10% owner
Buy indirect
116,904
$13.97
$1.63M
ADAR1 Capital Management, LLC
4 May 2026
10% owner
Buy indirect
3,900
$13.90
$54.20K
Lieber Jonathan I
14 Mar 2023
See Remarks
Buy
5,000
$5.21
$26.05K
Fryer Jeffrey M
21 Mar 2022
See Remarks
Buy indirect
3,000
$8.04
$24.12K
Fryer Jeffrey M
19 Jan 2022
See Remarks
Buy indirect
1,400
$8.70
$12.18K
Uden Stephen
13 Jan 2022
See Remarks
Buy
807
$9.62
$7.76K
Uden Stephen
13 Jan 2022
See Remarks
Buy
4,193
$9.06
$37.99K
Uden Stephen
12 Jan 2022
See Remarks
Buy
5,000
$10.55
$52.75K
MACKAY MARTIN
11 Jan 2022
Chief Executive Officer
Buy
4,496
$10.65
$47.88K
MACKAY MARTIN
10 Jan 2022
Chief Executive Officer
Buy
5,504
$10.10
$55.59K
Fryer Jeffrey M
7 Jan 2022
See Remarks
Buy indirect
9,295
$9.44
$87.74K
Fryer Jeffrey M
7 Jan 2022
See Remarks
Buy indirect
705
$8.97
$6.32K
SHANNON TIMOTHY M
2 Aug 2021
Director
Buy indirect
76,923
$13.00
$1,000.00K
HUNT RONALD
2 Aug 2021
Director
Buy indirect
153,846
$13.00
$2.00M
HUNT RONALD
2 Aug 2021
Director
Buy indirect
153,846
$13.00
$2.00M
Hopfner Robert Lorne
2 Aug 2021
Director
Buy indirect
576,923
$13.00
$7.50M
5AM Opportunities I, L.P.
2 Aug 2021
10% owner
Buy indirect
615,384
$13.00
$8.00M
PARMAR KUSH
2 Aug 2021
Director
Buy indirect
615,384
$13.00
$8.00M
VIKING GLOBAL INVESTORS LP
29 Jul 2021
10% owner
Buy indirect
806,000
$13.00
$10.48M

What was left out

Form 4 filings counted 94
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 11
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 0
Sales at will 15
Transactions with no price 0
Shares from compensation/vesting 16,813,033
Sales filed before the plan box existed 14
History held since 2 Aug 2021