Rallybio RLYB Insider Ownership

NASDAQ RLYB
$17.22 +0.17 (+1.00%)
At close: Sep 29, 2026 · 4:00 PM EDT

Insider Holdings by Owner

2.02Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
55.64%
▼-27.83% pp QoQ
Shares Held by Insiders
3.17Mn
filed for Sep 2026
▼-33.34% QoQ
Shares Outstanding
5.70Mn
5,699,111 shares
Direct Holdings
26.26K
Indirect: 3.14Mn
Net Shares Traded (QoQ)
-1.59Mn
net selling in Sep 2026
Insiders Holding Shares
9
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —

Insider Ownership Summary

Quarter ending 30 Sep, 2026

RLYB's three largest insider shareholders as of September 29, 2026 are Capital Management, Llc Adar1 (TenPercentOwner, 926.35K shares), Kush Parmar (Director, 497.59K shares), Opportunities I, L.P. 5Am (TenPercentOwner, 497.59K shares).

Form 4 Holdings

Insiders Holding RLYB

Insiders 9
Shares held 2.02Mn
Of outstanding 35.44%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Capital Management, Llc Adar1 TenPercentOwner 0 926,352 926,352 45.9% 20 May, 2026
2 Opportunities I, L.P. 5Am TenPercentOwner 0 466,341 466,341 23.1% 07 Jun, 2022
3 Partners V, Llc 5Am TenPercentOwner 0 297,371 297,371 14.7% 09 Mar, 2023
4 Kush Parmar Director 0 297,371 297,371 14.7% 09 Mar, 2023
5 Hui Liu Director 12,044 0 12,044 0.6% 28 Sep, 2026
6 Helen M Boudreau Director 6,542 0 6,542 0.3% 10 Jul, 2026
7 Jeffrey M Fryer Officer 0 5,881 5,881 0.3% 23 Mar, 2022
8 Jonathan I Lieber Chief Financial Officer 4,115 0 4,115 0.2% 23 Feb, 2026
9 Wendy Chung Director 3,562 0 3,562 0.2% 18 Sep, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

138 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
24 Sep, 2026 Hui Liu Director Acquired M 3,562 $2.38 $8.48K 3,562 Direct
24 Sep, 2026 Hui Liu Director Acquired M 8,482 $7.60 $64.46K 12,044 Direct
24 Sep, 2026 Hui Liu Director Disposed M 3,562 $0.00 $0 0 Direct
24 Sep, 2026 Hui Liu Director Disposed M 8,482 $5.60 $47.50K 0 Direct
16 Sep, 2026 Wendy Chung Director Acquired M 3,562 $2.38 $8.48K 3,562 Direct
16 Sep, 2026 Wendy Chung Director Disposed M 3,562 $0.00 $0 0 Direct
06 Jul, 2026 Helen M Boudreau Director Acquired M 3,562 $2.38 $8.48K 6,542 Direct
06 Jul, 2026 Helen M Boudreau Director Disposed M 3,562 $0.00 $0 0 Direct
18 May, 2026 Capital Management, Llc Adar1 TenPercentOwner Acquired P 6,009 $13.98 $83.98K 916,152 Indirect
19 May, 2026 Capital Management, Llc Adar1 TenPercentOwner Acquired P 10,000 $13.98 $139.82K 926,152 Indirect
19 May, 2026 Capital Management, Llc Adar1 TenPercentOwner Acquired P 200 $13.80 $2.76K 926,352 Indirect
13 May, 2026 Capital Management, Llc Adar1 TenPercentOwner Acquired P 4,081 $13.80 $56.31K 834,665 Indirect
13 May, 2026 Capital Management, Llc Adar1 TenPercentOwner Acquired P 75,178 $14.00 $1.05Mn 909,843 Indirect
15 May, 2026 Capital Management, Llc Adar1 TenPercentOwner Acquired P 100 $13.80 $1.38K 909,943 Indirect
15 May, 2026 Capital Management, Llc Adar1 TenPercentOwner Acquired P 200 $13.95 $2.79K 910,143 Indirect
11 May, 2026 Capital Management, Llc Adar1 TenPercentOwner Acquired P 5,100 $14.00 $71.39K 784,884 Indirect
11 May, 2026 Capital Management, Llc Adar1 TenPercentOwner Acquired P 25,000 $14.00 $350.00K 809,884 Indirect
11 May, 2026 Capital Management, Llc Adar1 TenPercentOwner Acquired P 19,900 $14.00 $278.60K 829,784 Indirect
12 May, 2026 Capital Management, Llc Adar1 TenPercentOwner Acquired P 800 $13.83 $11.06K 830,584 Indirect
04 May, 2026 Capital Management, Llc Adar1 TenPercentOwner Acquired P 3,900 $13.90 $54.20K 627,779 Indirect