United States

Rallybio Corp (RLYB)

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Rallybio Corp experienced significant insider trading activity recently, characterized by substantial net buying. ADAR1 Capital Management, LLC executed eleven purchase transactions totaling over $2 million. These acquisitions occurred amidst a 15.4% stock price increase over the last quarter, following a positive earnings report where the company outperformed expectations by 14.8%.
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
Buy 19 May 2026
Value US$3,996,285.19 | Price 390.16 | Shares 38,872 (+25.0%)
Buy 19 May 2026
Value US$523,402.30 | Price 494.42 | Shares 26,474 (+8.9%)
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
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
4.0
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
4.0
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
4.0
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
4.0
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
4.0
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
4.0
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
4.0
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
4.0
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
4.0
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
4.0
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
4.0
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
4.0
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
4.0
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
4.0
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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