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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.

Individual transactions

15
Insider
Date
Role
Action
Shares
Price
Amount
Lieber Jonathan I
23 Feb 2026
Chief Financial Officer
Sell
789
$5.06
$3.99K
5AM Partners V, LLC
7 Mar 2023
10% owner
Sell indirect
100,000
$8.20
$820.00K
PARMAR KUSH
7 Mar 2023
Director
Sell indirect
100,000
$8.20
$820.00K
5AM Opportunities I, L.P.
3 Jun 2022
10% owner
Sell indirect
99,671
$12.50
$1.25M
5AM Opportunities I, L.P.
3 Jun 2022
10% owner
Sell indirect
50,329
$12.50
$629.11K
PARMAR KUSH
3 Jun 2022
Director
Sell indirect
50,329
$12.50
$629.11K
PARMAR KUSH
3 Jun 2022
Director
Sell indirect
99,671
$12.50
$1.25M
5AM Opportunities I, L.P.
23 May 2022
10% owner
Sell indirect
66,447
$13.00
$863.81K
5AM Opportunities I, L.P.
23 May 2022
10% owner
Sell indirect
33,553
$13.00
$436.19K
PARMAR KUSH
23 May 2022
Director
Sell indirect
33,553
$13.00
$436.19K
PARMAR KUSH
23 May 2022
Director
Sell indirect
66,447
$13.00
$863.81K
PARMAR KUSH
8 Feb 2022
Director
Sell indirect
70,461
$13.05
$919.52K
PARMAR KUSH
8 Feb 2022
Director
Sell indirect
139,539
$13.05
$1.82M
5AM Opportunities I, L.P.
8 Feb 2022
10% owner
Sell indirect
139,539
$13.05
$1.82M
5AM Opportunities I, L.P.
8 Feb 2022
10% owner
Sell indirect
70,461
$13.05
$919.52K
Show all 47 transactions →

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