United States

Rallybio Corp (RLYB)

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Rallybio Corp experienced multiple buy transactions from ADAR1 Capital Management, LLC throughout May 2026. The most recent activity occurred on May 19, 2026. Prior to these acquisitions, Chief Financial Officer Jonathan I. Lieber executed a sale of shares on February 23, 2026. No further insider trading transactions have been reported within the last three months.
Ticker: RLYB Exchange: NSM
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Insider trades have triggered activity signals for Rallybio Corp. Upgrade to see score, net flow, insiders and the full signal context.

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Top insiders
Trades
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
1.7
Lieber Jonathan I Chief Financial Officer Officer
Transaction date
Sale
Price
5.06
Quantity 789 -16.1%
Value US$3,992
1.7
Lieber Jonathan I See Remarks Officer
Transaction date
Purchase
Price
5.21
Quantity 5,000 +inf%
Value US$26,050
4.0
PARMAR KUSH Non-Executive Director
Transaction date
Sale
Price
8.20
Quantity 100,000 -4.0%
Value US$820,000
2.5
5AM Partners V, LLC Large shareholder
Transaction date
Sale
Price
8.20
Quantity 100,000 -4.0%
Value US$820,000
4.0
PARMAR KUSH Non-Executive Director Large shareholder
Transaction date
Sale
Price
12.50
Quantity 50,329 -3.9%
Value US$629,112
4.0
PARMAR KUSH Non-Executive Director Large shareholder
Transaction date
Sale
Price
12.50
Quantity 99,671 -3.9%
Value US$1,245,888
4.0
PARMAR KUSH Non-Executive Director Large shareholder
Transaction date
Sale
Price
13.00
Quantity 33,553 -2.5%
Value US$436,189
4.0
PARMAR KUSH Non-Executive Director Large shareholder
Transaction date
Sale
Price
13.00
Quantity 66,447 -2.5%
Value US$863,811
3.1
Fryer Jeffrey M See Remarks Officer
Transaction date
Purchase
Price
8.04
Quantity 3,000 +6.8%
Value US$24,120
4.0
PARMAR KUSH Non-Executive Director
Transaction date
Sale
Price
13.05
Quantity 70,461 -5.0%
Value US$919,516
4.0
PARMAR KUSH Non-Executive Director
Transaction date
Sale
Price
13.05
Quantity 139,539 -5.0%
Value US$1,820,984
3.1
Fryer Jeffrey M See Remarks Officer
Transaction date
Purchase
Price
8.70
Quantity 1,400 +3.3%
Value US$12,180
2.6
Uden Stephen See Remarks Officer
Transaction date
Purchase
Price
9.62
Quantity 807 +0.1%
Value US$7,763
2.6
Uden Stephen See Remarks Officer
Transaction date
Purchase
Price
9.06
Quantity 4,193 +0.6%
Value US$37,989
2.6
Uden Stephen See Remarks Officer
Transaction date
Purchase
Price
10.55
Quantity 5,000 +0.7%
Value US$52,750
2.2
MACKAY MARTIN Chief Executive Officer Executive Director
Transaction date
Purchase
Price
10.65
Quantity 4,496 +1.6%
Value US$47,882
2.2
MACKAY MARTIN Chief Executive Officer Executive Director
Transaction date
Purchase
Price
10.10
Quantity 5,504 +2.0%
Value US$55,590
3.1
Fryer Jeffrey M See Remarks Officer
Transaction date
Purchase
Price
9.44
Quantity 9,295 +27.9%
Value US$87,745
3.1
Fryer Jeffrey M See Remarks Officer
Transaction date
Purchase
Price
8.97
Quantity 705 +2.2%
Value US$6,324
3.8
SHANNON TIMOTHY M Non-Executive Director
Transaction date
Purchase
Price
13.00
Quantity 76,923 +3.3%
Value US$999,999
4.0
PARMAR KUSH Non-Executive Director
Transaction date
Purchase
Price
13.00
Quantity 615,384 +77.8%
Value US$7,999,992
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-05-20 2026-05-19 B Purchase
3.9
ADAR1 Capital Management, LLC
Large shareholder
38,872 +25.0%
390.16
US$3,996,285 		38,872 +25.0% 390.16 US$3,996,285
2026-05-20 2026-05-19 B Purchase
3.9
ADAR1 Capital Management, LLC
Large shareholder
26,474 +8.9%
494.42
US$523,402 		26,474 +8.9% 494.42 US$523,402
2026-05-20 2026-05-18 B Purchase
3.9
ADAR1 Capital Management, LLC
Large shareholder
18,474 -6.9%
398.92
US$1,669,074 		18,474 -6.9% 398.92 US$1,669,074
2026-05-15 2026-05-15 B Purchase
3.9
ADAR1 Capital Management, LLC
Large shareholder
200 +0.0%
13.95
US$2,790 		200 +0.0% 13.95 US$2,790
2026-05-15 2026-05-15 B Purchase
3.9
ADAR1 Capital Management, LLC
Large shareholder
100 +0.0%
13.80
US$1,380 		100 +0.0% 13.80 US$1,380
2026-05-15 2026-05-13 B Purchase
3.9
ADAR1 Capital Management, LLC
Large shareholder
75,178 +9.0%
14.00
US$1,052,492 		75,178 +9.0% 14.00 US$1,052,492
2026-05-15 2026-05-13 B Purchase
3.9
ADAR1 Capital Management, LLC
Large shareholder
4,081 +0.5%
13.80
US$56,315 		4,081 +0.5% 13.80 US$56,315
2026-05-13 2026-05-12 B Purchase
3.9
ADAR1 Capital Management, LLC
Large shareholder
800 +0.1%
13.83
US$11,063 		800 +0.1% 13.83 US$11,063
2026-05-13 2026-05-11 B Purchase
3.9
ADAR1 Capital Management, LLC
Large shareholder
19,900 +2.5%
14.00
US$278,600 		19,900 +2.5% 14.00 US$278,600
2026-05-13 2026-05-11 B Purchase
3.9
ADAR1 Capital Management, LLC
Large shareholder
25,000 +3.2%
14.00
US$350,000 		25,000 +3.2% 14.00 US$350,000
2026-05-13 2026-05-11 B Purchase
3.9
ADAR1 Capital Management, LLC
Large shareholder
5,100 +0.7%
14.00
US$71,392 		5,100 +0.7% 14.00 US$71,392
2026-05-06 2026-05-05 B Purchase
3.9
ADAR1 Capital Management, LLC
Large shareholder
35,101 +4.7%
14.00
US$491,260 		35,101 +4.7% 14.00 US$491,260
2026-05-06 2026-05-04 B Purchase
3.9
ADAR1 Capital Management, LLC
Large shareholder
116,904 +18.6%
13.97
US$1,633,207 		116,904 +18.6% 13.97 US$1,633,207
2026-05-06 2026-05-04 B Purchase
3.9
ADAR1 Capital Management, LLC
Large shareholder
3,900 +0.6%
13.90
US$54,201 		3,900 +0.6% 13.90 US$54,201
2026-02-23 2026-02-23 S Sale
1.7
Lieber Jonathan I

Chief Financial Officer

Officer
789 -16.1%
5.06
US$3,992 		789 -16.1% 5.06 US$3,992
2023-03-16 2023-03-14 B Purchase
1.7
Lieber Jonathan I

See Remarks

Officer
5,000 +inf%
5.21
US$26,050 		5,000 +inf% 5.21 US$26,050
2023-03-09 2023-03-07 S Sale
4.0
PARMAR KUSH
Non-Executive Director
100,000 -4.0%
8.20
US$820,000 		100,000 -4.0% 8.20 US$820,000
2023-03-09 2023-03-07 S Sale
2.5
5AM Partners V, LLC
Large shareholder
100,000 -4.0%
8.20
US$820,000 		100,000 -4.0% 8.20 US$820,000
2022-06-07 2022-06-03 S Sale
4.0
PARMAR KUSH
Non-Executive Director Large shareholder
50,329 -3.9%
12.50
US$629,112 		50,329 -3.9% 12.50 US$629,112
2022-06-07 2022-06-03 S Sale
4.0
PARMAR KUSH
Non-Executive Director Large shareholder
99,671 -3.9%
12.50
US$1,245,888 		99,671 -3.9% 12.50 US$1,245,888
2022-06-07 2022-06-03 S Sale
3.6
5AM Opportunities I, L.P.
Large shareholder
99,671 -3.9%
12.50
US$1,245,888 		99,671 -3.9% 12.50 US$1,245,888
2022-06-07 2022-06-03 S Sale
3.6
5AM Opportunities I, L.P.
Large shareholder
50,329 -3.9%
12.50
US$629,112 		50,329 -3.9% 12.50 US$629,112
2022-05-25 2022-05-23 S Sale
4.0
PARMAR KUSH
Non-Executive Director Large shareholder
33,553 -2.5%
13.00
US$436,189 		33,553 -2.5% 13.00 US$436,189
2022-05-25 2022-05-23 S Sale
4.0
PARMAR KUSH
Non-Executive Director Large shareholder
66,447 -2.5%
13.00
US$863,811 		66,447 -2.5% 13.00 US$863,811
2022-05-25 2022-05-23 S Sale
3.6
5AM Opportunities I, L.P.
Large shareholder
66,447 -2.5%
13.00
US$863,811 		66,447 -2.5% 13.00 US$863,811
2022-05-25 2022-05-23 S Sale
3.6
5AM Opportunities I, L.P.
Large shareholder
33,553 -2.5%
13.00
US$436,189 		33,553 -2.5% 13.00 US$436,189
2022-03-23 2022-03-21 B Purchase
3.1
Fryer Jeffrey M

See Remarks

Officer
3,000 +6.8%
8.04
US$24,120 		3,000 +6.8% 8.04 US$24,120
2022-02-10 2022-02-08 S Sale
4.0
PARMAR KUSH
Non-Executive Director
70,461 -5.0%
13.05
US$919,516 		70,461 -5.0% 13.05 US$919,516
2022-02-10 2022-02-08 S Sale
4.0
PARMAR KUSH
Non-Executive Director
139,539 -5.0%
13.05
US$1,820,984 		139,539 -5.0% 13.05 US$1,820,984
2022-02-10 2022-02-08 S Sale
3.6
5AM Opportunities I, L.P.
Large shareholder
139,539 -5.0%
13.05
US$1,820,984 		139,539 -5.0% 13.05 US$1,820,984
2022-02-10 2022-02-08 S Sale
3.6
5AM Opportunities I, L.P.
Large shareholder
70,461 -5.0%
13.05
US$919,516 		70,461 -5.0% 13.05 US$919,516
2022-01-21 2022-01-19 B Purchase
3.1
Fryer Jeffrey M

See Remarks

Officer
1,400 +3.3%
8.70
US$12,180 		1,400 +3.3% 8.70 US$12,180
2022-01-14 2022-01-13 B Purchase
2.6
Uden Stephen

See Remarks

Officer
807 +0.1%
9.62
US$7,763 		807 +0.1% 9.62 US$7,763
2022-01-14 2022-01-13 B Purchase
2.6
Uden Stephen

See Remarks

Officer
4,193 +0.6%
9.06
US$37,989 		4,193 +0.6% 9.06 US$37,989
2022-01-14 2022-01-12 B Purchase
2.6
Uden Stephen

See Remarks

Officer
5,000 +0.7%
10.55
US$52,750 		5,000 +0.7% 10.55 US$52,750
2022-01-12 2022-01-11 B Purchase
2.2
MACKAY MARTIN

Chief Executive Officer

Executive Director
4,496 +1.6%
10.65
US$47,882 		4,496 +1.6% 10.65 US$47,882
2022-01-12 2022-01-10 B Purchase
2.2
MACKAY MARTIN

Chief Executive Officer

Executive Director
5,504 +2.0%
10.10
US$55,590 		5,504 +2.0% 10.10 US$55,590
2022-01-11 2022-01-07 B Purchase
3.1
Fryer Jeffrey M

See Remarks

Officer
9,295 +27.9%
9.44
US$87,745 		9,295 +27.9% 9.44 US$87,745
2022-01-11 2022-01-07 B Purchase
3.1
Fryer Jeffrey M

See Remarks

Officer
705 +2.2%
8.97
US$6,324 		705 +2.2% 8.97 US$6,324
2021-08-04 2021-08-02 B Purchase
3.8
SHANNON TIMOTHY M
Non-Executive Director
76,923 +3.3%
13.00
US$999,999 		76,923 +3.3% 13.00 US$999,999
2021-08-04 2021-08-02 B Purchase
4.0
PARMAR KUSH
Non-Executive Director
615,384 +77.8%
13.00
US$7,999,992 		615,384 +77.8% 13.00 US$7,999,992
2021-08-04 2021-08-02 B Purchase
3.6
5AM Opportunities I, L.P.
Large shareholder
615,384 +77.8%
13.00
US$7,999,992 		615,384 +77.8% 13.00 US$7,999,992
2021-08-02 2021-07-29 B Purchase
3.2
VIKING GLOBAL INVESTORS LP
Large shareholder
806,000 +23.8%
13.00
US$10,478,000 		806,000 +23.8% 13.00 US$10,478,000
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