GRI Bio GRI Insider Ownership

NASDAQ GRI
$1.47 +0.01 (+0.66%)
As of: Oct 21, 2026 · 2:10 PM EDT

Insider Holdings by Owner

1 Shares

Insider Ownership Statistics

as of N/A
Insider Ownership
0%
Shares Held by Insiders
0
filed for
Shares Outstanding
2.19Mn
2,186,115 shares
Direct Holdings
0
Indirect: 0
Net Shares Traded (QoQ)
0
no net change in
Insiders Holding Shares
4
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 —
Form 4 Holdings

Insiders Holding GRI

Insiders 4
Shares held 1
Of outstanding 0.0000%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Walter Marc Hertz Chief Executive Officer 0 0 0 52.6% 24 Apr, 2023
2 Albert Agro Chief Medical Officer 0 0 0 22.8% 24 Apr, 2023
3 Vipin Chaturvedi Chief Scientific Officer 0 0 0 22.8% 24 Apr, 2023
4 Marella Thorell Director 0 0 0 1.8% 14 Dec, 2022

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

60 Insider Transactions

Source SEC Form 4
Latest quarter
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
18 Sep, 2025 David Charles Baker Director Acquired A 23,605 $0.00 $0 843 Direct
18 Sep, 2025 Camilla V Simpson Director Acquired A 23,605 $0.00 $0 843 Direct
18 Sep, 2025 David Leslie Szekeres Director Acquired A 39,897 $0.00 $0 1,425 Direct
18 Sep, 2025 Leanne Kelly Chief Financial Officer Acquired A 43,222 $0.00 $0 1,543 Direct
18 Sep, 2025 Vipin Chaturvedi Chief Scientific Officer Acquired A 43,222 $0.00 $0 1,543 Direct
18 Sep, 2025 Roelof Rongen Director Acquired A 23,605 $0.00 $0 843 Direct
18 Sep, 2025 Walter Marc Hertz Chief Executive Officer Acquired A 103,067 $0.00 $0 3,681 Direct
26 Aug, 2025 Walter Marc Hertz Chief Executive Officer Acquired A 26,688 $0.00 $0 953 Direct
26 Aug, 2025 David Charles Baker Director Acquired A 5,994 $0.00 $0 214 Direct
26 Aug, 2025 Leanne Kelly Chief Financial Officer Acquired A 11,854 $0.00 $0 423 Direct
26 Aug, 2025 David Leslie Szekeres Director Acquired A 10,276 $0.00 $0 367 Direct
26 Aug, 2025 Roelof Rongen Director Acquired A 5,994 $0.00 $0 214 Direct
26 Aug, 2025 Camilla V Simpson Director Acquired A 5,994 $0.00 $0 214 Direct
26 Aug, 2025 Vipin Chaturvedi Chief Scientific Officer Acquired A 11,854 $0.00 $0 423 Direct
13 Aug, 2025 Roelof Rongen Director Acquired A 4,527 $0.00 $0 162 Direct
13 Aug, 2025 David Charles Baker Director Acquired A 4,527 $0.00 $0 162 Direct
13 Aug, 2025 David Leslie Szekeres Director Acquired A 7,545 $0.00 $0 269 Direct
13 Aug, 2025 Camilla V Simpson Director Acquired A 4,527 $0.00 $0 162 Direct
23 Jan, 2025 David Leslie Szekeres Director Acquired A 51,937 $326.45 $16.95Mn 109 Direct
23 Jan, 2025 Walter Marc Hertz Chief Executive Officer Acquired A 129,730 $326.45 $42.35Mn 272 Direct