Repligen RGEN Insider Ownership

NASDAQ RGEN
$165.05 -3.48 (-2.06%)
As of: Sep 9, 2026 · 3:59 PM EDT

Insider Holdings by Owner

442.39K Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
0.786%
-0.011% pp QoQ
Shares Held by Insiders
444.20K
filed for Sep 2026
-1.42% QoQ
Shares Outstanding
56.53Mn
56,532,000 shares
Direct Holdings
442.39K
Indirect: 1.81K
Net Shares Traded (QoQ)
-6.41K
net selling in Sep 2026
Insiders Holding Shares
18
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

As of September 09, 2026, the three largest insider holders of RGEN are Karen A Dawes (Director, 92.82K shares), Anthony Hunt (Chief Executive Officer, 89.06K shares), Olivier Loeillot (Chief Executive Officer, 48.37K shares).

Form 4 Holdings

Insiders Holding RGEN

Insiders 18
Shares held 442.39K
Of outstanding 0.783%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Karen A Dawes Director 92,816 0 92,816 21.0% 18 May, 2026
2 Anthony Hunt Chief Executive Officer 89,062 0 89,062 20.1% 03 Mar, 2026
3 Olivier Loeillot Chief Executive Officer 48,369 0 48,369 10.9% 08 Sep, 2026
4 Glenn P Muir Director 40,051 0 40,051 9.1% 18 May, 2026
5 Jon Snodgres Chief Financial Officer 37,381 0 37,381 8.4% 16 May, 2023
6 Christine Gebski Officer 27,419 0 27,419 6.2% 15 May, 2024
7 James Bylund Chief Operating Officer 25,423 0 25,423 5.7% 23 Mar, 2026
8 Ralf Kuriyel Senior Vp, Rd 20,062 0 20,062 4.5% 23 Mar, 2026
9 Jason K Garland Cfo 18,829 0 18,829 4.3% 17 Jul, 2026
10 Brian Robb Douglass Chief Product Officer 7,985 0 7,985 1.8% 08 May, 2026
11 Martin D Madaus Director 6,581 0 6,581 1.5% 18 May, 2026
12 Manner Carrie Eglinton Director 5,461 0 5,461 1.2% 18 May, 2026
13 Nicolas Barthelemy Director 5,436 0 5,436 1.2% 18 May, 2026
14 Rohin Mhatre Director 5,014 0 5,014 1.1% 18 May, 2026
15 Violetta Hughes Chief Accounting Officer 4,142 0 4,142 0.9% 04 Sep, 2025
16 Konstantin Konstantinov Director 3,889 0 3,889 0.9% 18 May, 2026
17 Margaret Pax Director 3,011 0 3,011 0.7% 18 May, 2026
18 Thomas F Jr Ryan Director 1,457 0 1,457 0.3% 02 Mar, 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

2,828 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
03 Sep, 2026 Olivier Loeillot Chief Executive Officer Disposed F 2,842 $169.61 $482.03K 51,404 Direct
04 Sep, 2026 Olivier Loeillot Chief Executive Officer Disposed S 3,035 $165.90 $503.51K 48,369 Direct
20 Aug, 2026 Olivier Loeillot Chief Executive Officer Acquired M 5,426 $141.79 $769.35K 59,672 Direct
20 Aug, 2026 Olivier Loeillot Chief Executive Officer Disposed S 5,426 $180.00 $976.68K 54,246 Direct
20 Aug, 2026 Olivier Loeillot Chief Executive Officer Disposed M 5,426 $0.00 $0 10,852 Direct
16 Jul, 2026 Jason K Garland Cfo Disposed S 530 $150.00 $79.50K 18,829 Direct
25 Jun, 2026 Jason K Garland Cfo Disposed S 733 $145.00 $106.29K 19,359 Direct
14 May, 2026 Manner Carrie Eglinton Director Acquired A 995 $0.00 $0 5,461 Direct
14 May, 2026 Margaret Pax Director Acquired A 995 $0.00 $0 3,011 Direct
14 May, 2026 Konstantin Konstantinov Director Acquired A 995 $0.00 $0 3,889 Direct
14 May, 2026 Karen A Dawes Director Acquired A 995 $0.00 $0 92,816 Direct
14 May, 2026 Martin D Madaus Director Acquired A 995 $0.00 $0 6,581 Direct
14 May, 2026 Konstantin Konstantinov Director Acquired A 2,239 $0.00 $0 2,239 Direct
14 May, 2026 Manner Carrie Eglinton Director Acquired A 2,239 $0.00 $0 2,239 Direct
14 May, 2026 Karen A Dawes Director Acquired A 2,239 $0.00 $0 2,239 Direct
14 May, 2026 Margaret Pax Director Acquired A 2,239 $0.00 $0 2,239 Direct
14 May, 2026 Martin D Madaus Director Acquired A 2,239 $0.00 $0 2,239 Direct
07 May, 2026 Brian Robb Douglass Chief Product Officer Disposed F 334 $126.43 $42.23K 7,985 Direct
21 Apr, 2026 Olivier Loeillot Chief Executive Officer Disposed S 3,832 $140.00 $536.48K 54,246 Direct
05 Mar, 2026 Jason K Garland Cfo Acquired A 7,751 $0.00 $0 20,092 Direct