RLYB

Rallybio Corp

Insider trading activity for Rallybio Corp, straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

-$9.6K

net selling

Bought(0 · 0 insiders): $0
Sold(1 · 1 insiders): $9.6K

Past 6 months

+$221.1K

net buying

Bought(5 · 1 insiders): $230.7K
Sold(1 · 1 insiders): $9.6K

Past 12 months

+$4.2M

net buying

Bought(14 · 1 insiders): $4.2M
Sold(2 · 1 insiders): $13.6K

Transaction history

The 78 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Nov 4	Hunt Ronald	Director	MEXER◆	14,305	$3.60	$51.5K	—	Open the original filing on SEC.gov
Nov 4	Hunt Ronald	Director	MEXER	14,305	$4.45	$63.7K	+96.5%	Open the original filing on SEC.gov
Nov 4	MacKay Martin	Director	MEXER◆	18,055	$3.60	$65K	—	Open the original filing on SEC.gov
Nov 4	MacKay Martin	Director	MEXER◆	3,562	—	—	—	Open the original filing on SEC.gov
Nov 4	MacKay Martin	Director	MEXER◆	11,607	$5.60	$65K	—	Open the original filing on SEC.gov
Nov 4	MacKay Martin	Director	MEXER	18,055	$4.45	$80.3K	+16.9%	Open the original filing on SEC.gov
Nov 4	MacKay Martin	Director	MEXER	3,562	$2.38	$8.5K	+3.4%	Open the original filing on SEC.gov
Nov 4	MacKay Martin	Director	MEXER	11,607	$7.60	$88.2K	+12.6%	Open the original filing on SEC.gov
Nov 2	Lieber Jonathan I	Chief Financial Officer	MEXER◆	7,124	—	—	—	Open the original filing on SEC.gov
Nov 2	Lieber Jonathan I	Chief Financial Officer	MEXER	7,124	$14.88	$106K	+19.3%	Open the original filing on SEC.gov
Oct 29	Lieber Jonathan I	Chief Financial Officer	MEXER◆	13,589	—	—	—	Open the original filing on SEC.gov
Oct 29	Lieber Jonathan I	Chief Financial Officer	MEXER◆	7,875	—	—	—	Open the original filing on SEC.gov
Oct 29	Lieber Jonathan I	Chief Financial Officer	MEXER	13,589	$6.08	$82.6K	+58.0%	Open the original filing on SEC.gov
Oct 29	Lieber Jonathan I	Chief Financial Officer	MEXER	7,875	$14.88	$117.2K	+50.6%	Open the original filing on SEC.gov
Oct 29	Hunt Ronald	Director	MEXER◆	2,062	—	—	—	Open the original filing on SEC.gov
Oct 29	Hunt Ronald	Director	MEXER◆	9,196	$5.60	$51.5K	—	Open the original filing on SEC.gov
Oct 29	Hunt Ronald	Director	MEXER◆	3,562	—	—	—	Open the original filing on SEC.gov
Oct 29	Hunt Ronald	Director	MEXER	2,062	$15.28	$31.5K	+16.2%	Open the original filing on SEC.gov
Oct 29	Hunt Ronald	Director	MEXER	9,196	$7.60	$69.9K	+258.2%	Open the original filing on SEC.gov
Oct 29	Hunt Ronald	Director	MEXER	3,562	$2.38	$8.5K	—	Open the original filing on SEC.gov
Oct 28	Nash Christine A	Director	MEXER◆	3,562	—	—	—	Open the original filing on SEC.gov
Oct 28	Nash Christine A	Director	MEXER	3,562	$2.38	$8.5K	—	Open the original filing on SEC.gov
Oct 27	Uden Stephen	Chief Executive Officer	MEXER◆	33,244	—	—	—	Open the original filing on SEC.gov
Oct 27	Uden Stephen	Chief Executive Officer	MEXER	33,244	$6.08	$202.1K	+28.7%	Open the original filing on SEC.gov
Oct 27	Lieber Jonathan I	Chief Financial Officer	SSELL	599	$16.04	$9.6K	-3.7%	Open the original filing on SEC.gov
Oct 26	Chung Wendy	Director	MEXER◆	2,062	—	—	—	Open the original filing on SEC.gov
Oct 26	Chung Wendy	Director	MEXER	2,062	$15.28	$31.5K	+57.9%	Open the original filing on SEC.gov
Oct 26	Lieber Jonathan I	Chief Financial Officer	AGRANT	2,500	—	—	+18.3%	Open the original filing on SEC.gov
Oct 16	Soteropoulos Paula	Director	MEXER◆	3,562	—	—	—	Open the original filing on SEC.gov
Oct 16	Soteropoulos Paula	Director	MEXER	3,562	$2.38	$8.5K	+119.4%	Open the original filing on SEC.gov
Oct 16	Boudreau Helen M	Director	MEXER◆	2,062	—	—	—	Open the original filing on SEC.gov
Oct 16	Boudreau Helen M	Director	MEXER	2,062	$15.28	$31.5K	+31.5%	Open the original filing on SEC.gov
Oct 12	Hopfner Robert Lorne	Director	MEXER◆	2,062	—	—	—	Open the original filing on SEC.gov
Oct 12	Hopfner Robert Lorne	Director	MEXER◆	3,562	—	—	—	Open the original filing on SEC.gov
Oct 12	Hopfner Robert Lorne	Director	MEXER◆	9,196	$0.56	$5.1K	—	Open the original filing on SEC.gov
Oct 12	Hopfner Robert Lorne	Director	MEXER	2,062	$15.28	$31.5K	+16.2%	Open the original filing on SEC.gov
Oct 12	Hopfner Robert Lorne	Director	MEXER	3,562	$2.38	$8.5K	+38.7%	Open the original filing on SEC.gov
Oct 12	Hopfner Robert Lorne	Director	MEXER	9,196	$7.60	$69.9K	—	Open the original filing on SEC.gov
Oct 9	Lieber Jonathan I	Chief Financial Officer	MEXER◆	3,910	—	—	—	Open the original filing on SEC.gov
Oct 9	Lieber Jonathan I	Chief Financial Officer	MEXER	3,910	$6.08	$23.8K	+40.1%	Open the original filing on SEC.gov
Oct 6	Uden Stephen	Chief Executive Officer	MEXER◆	22,456	—	—	—	Open the original filing on SEC.gov
Oct 6	Uden Stephen	Chief Executive Officer	MEXER	22,456	$6.08	$136.5K	+24.1%	Open the original filing on SEC.gov
Sep 29	Lieber Jonathan I	Chief Financial Officer	MEXER◆	5,000	—	—	—	Open the original filing on SEC.gov
Sep 29	Lieber Jonathan I	Chief Financial Officer	MEXER	5,000	$6.08	$30.4K	+105.5%	Open the original filing on SEC.gov
Sep 24	Liu Hui	Director	MEXER◆	8,482	$5.60	$47.5K	—	Open the original filing on SEC.gov
Sep 24	Liu Hui	Director	MEXER◆	3,562	—	—	—	Open the original filing on SEC.gov
Sep 24	Liu Hui	Director	MEXER	8,482	$7.60	$64.5K	+238.1%	Open the original filing on SEC.gov
Sep 24	Liu Hui	Director	MEXER	3,562	$2.38	$8.5K	—	Open the original filing on SEC.gov
Sep 16	Chung Wendy	Director	MEXER◆	3,562	—	—	—	Open the original filing on SEC.gov
Sep 16	Chung Wendy	Director	MEXER	3,562	$2.38	$8.5K	—	Open the original filing on SEC.gov
Jul 6	Boudreau Helen M	Director	MEXER◆	3,562	—	—	—	Open the original filing on SEC.gov
Jul 6	Boudreau Helen M	Director	MEXER	3,562	$2.38	$8.5K	+119.5%	Open the original filing on SEC.gov
May 19	ADAR1 Capital Management…	10% Owner	PBUY	200	$13.80	$2.8K	+<0.1%	Open the original filing on SEC.gov
May 19	ADAR1 Capital Management…	10% Owner	PBUY	10,000	$13.98	$139.8K	+1.1%	Open the original filing on SEC.gov
May 18	ADAR1 Capital Management…	10% Owner	PBUY	6,009	$13.98	$84K	+0.7%	Open the original filing on SEC.gov
May 15	ADAR1 Capital Management…	10% Owner	PBUY	200	$13.95	$2.8K	+<0.1%	Open the original filing on SEC.gov
May 15	ADAR1 Capital Management…	10% Owner	PBUY	100	$13.80	$1.4K	+<0.1%	Open the original filing on SEC.gov
May 13	ADAR1 Capital Management…	10% Owner	PBUY	75,178	$14.00	$1.1M	+9.0%	Open the original filing on SEC.gov
May 13	ADAR1 Capital Management…	10% Owner	PBUY	4,081	$13.80	$56.3K	+0.5%	Open the original filing on SEC.gov
May 12	ADAR1 Capital Management…	10% Owner	PBUY	800	$13.83	$11.1K	+0.1%	Open the original filing on SEC.gov
May 11	ADAR1 Capital Management…	10% Owner	PBUY	19,900	$14.00	$278.6K	+2.5%	Open the original filing on SEC.gov
May 11	ADAR1 Capital Management…	10% Owner	PBUY	25,000	$14.00	$350K	+3.2%	Open the original filing on SEC.gov
May 11	ADAR1 Capital Management…	10% Owner	PBUY	5,100	$14.00	$71.4K	+0.7%	Open the original filing on SEC.gov
May 5	ADAR1 Capital Management…	10% Owner	PBUY	35,101	$14.00	$491.3K	+4.7%	Open the original filing on SEC.gov
May 4	ADAR1 Capital Management…	10% Owner	PBUY▲	116,904	$13.97	$1.6M	+18.6%	Open the original filing on SEC.gov
May 4	ADAR1 Capital Management…	10% Owner	PBUY★	3,900	$13.90	$54.2K	+0.6%	Open the original filing on SEC.gov
Feb 23	Lieber Jonathan I	Chief Financial Officer	SSELL	789	$5.06	$4K	-16.1%	Open the original filing on SEC.gov
Feb 18	MacKay Martin	Director	AGRANT◆	18,055	$3.60	$65K	—	Open the original filing on SEC.gov
Feb 18	Hunt Ronald	Director	AGRANT◆	14,305	$3.60	$51.5K	—	Open the original filing on SEC.gov
Feb 18	Lieber Jonathan I	Chief Financial Officer	AGRANT	2,500	—	—	+104.0%	Open the original filing on SEC.gov
May 13, 2025	Soteropoulos Paula	Director	AGRANT◆	28,500	—	—	—	Open the original filing on SEC.gov
May 13, 2025	Nash Christine A	Director	AGRANT◆	28,500	—	—	—	Open the original filing on SEC.gov
May 13, 2025	MacKay Martin	Director	AGRANT◆	28,500	—	—	—	Open the original filing on SEC.gov
May 13, 2025	Liu Hui	Director	AGRANT◆	28,500	—	—	—	Open the original filing on SEC.gov
May 13, 2025	Hopfner Robert Lorne	Director	AGRANT◆	28,500	—	—	—	Open the original filing on SEC.gov
May 13, 2025	Hunt Ronald	Director	AGRANT◆	28,500	—	—	—	Open the original filing on SEC.gov
May 13, 2025	Chung Wendy	Director	AGRANT◆	28,500	—	—	—	Open the original filing on SEC.gov
May 13, 2025	Boudreau Helen M	Director	AGRANT◆	28,500	—	—	—	Open the original filing on SEC.gov

MEXER◆$51.5K

Hunt Ronald · DirectorNov 4

14,305 sh @ $3.60

MEXER$63.7K

Hunt Ronald · DirectorNov 4

14,305 sh @ $4.45 · +96.5% own

MEXER◆$65K

MacKay Martin · DirectorNov 4

18,055 sh @ $3.60

MEXER◆—

MacKay Martin · DirectorNov 4

3,562 sh

MEXER◆$65K

MacKay Martin · DirectorNov 4

11,607 sh @ $5.60

MEXER$80.3K

MacKay Martin · DirectorNov 4

18,055 sh @ $4.45 · +16.9% own

MEXER$8.5K

MacKay Martin · DirectorNov 4

3,562 sh @ $2.38 · +3.4% own

MEXER$88.2K

MacKay Martin · DirectorNov 4

11,607 sh @ $7.60 · +12.6% own

MEXER◆—

Lieber Jonathan I · Chief Financial…Nov 2

7,124 sh

MEXER$106K

Lieber Jonathan I · Chief Financial…Nov 2

7,124 sh @ $14.88 · +19.3% own

MEXER◆—

Lieber Jonathan I · Chief Financial…Oct 29

13,589 sh

MEXER◆—

Lieber Jonathan I · Chief Financial…Oct 29

7,875 sh

MEXER$82.6K

Lieber Jonathan I · Chief Financial…Oct 29

13,589 sh @ $6.08 · +58.0% own

MEXER$117.2K

Lieber Jonathan I · Chief Financial…Oct 29

7,875 sh @ $14.88 · +50.6% own

MEXER◆—

Hunt Ronald · DirectorOct 29

2,062 sh

MEXER◆$51.5K

Hunt Ronald · DirectorOct 29

9,196 sh @ $5.60

MEXER◆—

Hunt Ronald · DirectorOct 29

3,562 sh

MEXER$31.5K

Hunt Ronald · DirectorOct 29

2,062 sh @ $15.28 · +16.2% own

MEXER$69.9K

Hunt Ronald · DirectorOct 29

9,196 sh @ $7.60 · +258.2% own

MEXER$8.5K

Hunt Ronald · DirectorOct 29

3,562 sh @ $2.38

MEXER◆—

Nash Christine A · DirectorOct 28

3,562 sh

MEXER$8.5K

Nash Christine A · DirectorOct 28

3,562 sh @ $2.38

MEXER◆—

Uden Stephen · Chief Executive…Oct 27

33,244 sh

MEXER$202.1K

Uden Stephen · Chief Executive…Oct 27

33,244 sh @ $6.08 · +28.7% own

SSELL$9.6K

Lieber Jonathan I · Chief Financial…Oct 27

599 sh @ $16.04 · -3.7% own

MEXER◆—

Chung Wendy · DirectorOct 26

2,062 sh

MEXER$31.5K

Chung Wendy · DirectorOct 26

2,062 sh @ $15.28 · +57.9% own

AGRANT—

Lieber Jonathan I · Chief Financial…Oct 26

2,500 sh · +18.3% own

MEXER◆—

Soteropoulos Paula · DirectorOct 16

3,562 sh

MEXER$8.5K

Soteropoulos Paula · DirectorOct 16

3,562 sh @ $2.38 · +119.4% own

MEXER◆—

Boudreau Helen M · DirectorOct 16

2,062 sh

MEXER$31.5K

Boudreau Helen M · DirectorOct 16

2,062 sh @ $15.28 · +31.5% own

MEXER◆—

Hopfner Robert Lorne · DirectorOct 12

2,062 sh

MEXER◆—

Hopfner Robert Lorne · DirectorOct 12

3,562 sh

MEXER◆$5.1K

Hopfner Robert Lorne · DirectorOct 12

9,196 sh @ $0.56

MEXER$31.5K

Hopfner Robert Lorne · DirectorOct 12

2,062 sh @ $15.28 · +16.2% own

MEXER$8.5K

Hopfner Robert Lorne · DirectorOct 12

3,562 sh @ $2.38 · +38.7% own

MEXER$69.9K

Hopfner Robert Lorne · DirectorOct 12

9,196 sh @ $7.60

MEXER◆—

Lieber Jonathan I · Chief Financial…Oct 9

3,910 sh

MEXER$23.8K

Lieber Jonathan I · Chief Financial…Oct 9

3,910 sh @ $6.08 · +40.1% own

MEXER◆—

Uden Stephen · Chief Executive…Oct 6

22,456 sh

MEXER$136.5K

Uden Stephen · Chief Executive…Oct 6

22,456 sh @ $6.08 · +24.1% own

MEXER◆—

Lieber Jonathan I · Chief Financial…Sep 29

5,000 sh

MEXER$30.4K

Lieber Jonathan I · Chief Financial…Sep 29

5,000 sh @ $6.08 · +105.5% own

MEXER◆$47.5K

Liu Hui · DirectorSep 24

8,482 sh @ $5.60

MEXER◆—

Liu Hui · DirectorSep 24

3,562 sh

MEXER$64.5K

Liu Hui · DirectorSep 24

8,482 sh @ $7.60 · +238.1% own

MEXER$8.5K

Liu Hui · DirectorSep 24

3,562 sh @ $2.38

MEXER◆—

Chung Wendy · DirectorSep 16

3,562 sh

MEXER$8.5K

Chung Wendy · DirectorSep 16

3,562 sh @ $2.38

MEXER◆—

Boudreau Helen M · DirectorJul 6

3,562 sh

MEXER$8.5K

Boudreau Helen M · DirectorJul 6

3,562 sh @ $2.38 · +119.5% own

PBUY$2.8K

ADAR1 Capital Management… · 10% OwnerMay 19

200 sh @ $13.80 · +<0.1% own

PBUY$139.8K

ADAR1 Capital Management… · 10% OwnerMay 19

10,000 sh @ $13.98 · +1.1% own

PBUY$84K

ADAR1 Capital Management… · 10% OwnerMay 18

6,009 sh @ $13.98 · +0.7% own

PBUY$2.8K

ADAR1 Capital Management… · 10% OwnerMay 15

200 sh @ $13.95 · +<0.1% own

PBUY$1.4K

ADAR1 Capital Management… · 10% OwnerMay 15

100 sh @ $13.80 · +<0.1% own

PBUY$1.1M

ADAR1 Capital Management… · 10% OwnerMay 13

75,178 sh @ $14.00 · +9.0% own

PBUY$56.3K

ADAR1 Capital Management… · 10% OwnerMay 13

4,081 sh @ $13.80 · +0.5% own

PBUY$11.1K

ADAR1 Capital Management… · 10% OwnerMay 12

800 sh @ $13.83 · +0.1% own

PBUY$278.6K

ADAR1 Capital Management… · 10% OwnerMay 11

19,900 sh @ $14.00 · +2.5% own

PBUY$350K

ADAR1 Capital Management… · 10% OwnerMay 11

25,000 sh @ $14.00 · +3.2% own

PBUY$71.4K

ADAR1 Capital Management… · 10% OwnerMay 11

5,100 sh @ $14.00 · +0.7% own

PBUY$491.3K

ADAR1 Capital Management… · 10% OwnerMay 5

35,101 sh @ $14.00 · +4.7% own

PBUY▲$1.6M

ADAR1 Capital Management… · 10% OwnerMay 4

116,904 sh @ $13.97 · +18.6% own

PBUY★$54.2K

ADAR1 Capital Management… · 10% OwnerMay 4

3,900 sh @ $13.90 · +0.6% own

SSELL$4K

Lieber Jonathan I · Chief Financial…Feb 23

789 sh @ $5.06 · -16.1% own

AGRANT◆$65K

MacKay Martin · DirectorFeb 18

18,055 sh @ $3.60

AGRANT◆$51.5K

Hunt Ronald · DirectorFeb 18

14,305 sh @ $3.60

AGRANT—

Lieber Jonathan I · Chief Financial…Feb 18

2,500 sh · +104.0% own

AGRANT◆—

Soteropoulos Paula · DirectorMay 13, 2025

28,500 sh

AGRANT◆—

Nash Christine A · DirectorMay 13, 2025

28,500 sh

AGRANT◆—

MacKay Martin · DirectorMay 13, 2025

28,500 sh

AGRANT◆—

Liu Hui · DirectorMay 13, 2025

28,500 sh

AGRANT◆—

Hopfner Robert Lorne · DirectorMay 13, 2025

28,500 sh

AGRANT◆—

Hunt Ronald · DirectorMay 13, 2025

28,500 sh

AGRANT◆—

Chung Wendy · DirectorMay 13, 2025

28,500 sh

AGRANT◆—

Boudreau Helen M · DirectorMay 13, 2025

28,500 sh

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

1 of 33 filings we hold was filed after the two-business-day deadline. The furthest past the deadline was 1 business day late.

Form 4 filings made after the two-business-day deadline, with the transaction date, the filing date and the number of business days between them.
Traded	Filed	Insider	Past deadline	Largest line	Source
Jul 6	Jul 9	Boudreau Helen MDirector	1day	$8.5K	Filing ↗

Boudreau Helen MDirector

1day

Traded Jul 6 · filed Jul 9Filing ↗

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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