Insider Transactions Reported by 18 Insiders of REPLIGEN CORP

Symbol
RGEN on Nasdaq
Location
Waltham, MA

Insiders trading volume in the past year

REPLIGEN CORP executives and other stock owners filed with the SEC include:

Name Relationship Holdings Value Past Year Net Change Change % Report Date
KAREN A. DAWES Director $14,783,181 -$44,275 -0.3% 17 Dec 2025
Anthony Hunt Director $11,130,078 -$17,874,958 -62% 02 Mar 2026
Jon Snodgres Chief Financial Officer $5,499,867 16 May 2023
Christine Gebski SVP, Filtration & Chromatography $4,478,619 14 May 2024
Olivier Loeillot Chief Executive Officer, Director $4,241,981 -$1,196,970 -22% 27 Feb 2026
James Bylund Chief Operating Officer $2,343,837 -$331,301 -12% 04 Mar 2026
RALF KURIYEL Senior VP, R&D $1,960,006 04 Mar 2026
Jason K. Garland Cfo $1,542,254 27 Feb 2026
Brian Robb Douglass Chief Product Officer $1,039,625 02 Mar 2026
GLENN P. MUIR Director $956,566 16 Dec 2025
Martin D. Madaus Director $928,432 +$201,830 +28% 08 Aug 2025
MANNER CARRIE EGLINTON Director $622,694 15 May 2025
NICOLAS BARTHELEMY Director $619,208 15 May 2025
Rohin Mhatre Director $560,369 15 May 2025
Violetta Hughes Chief Accounting Officer $526,655 02 Sep 2025
Konstantin Konstantinov Director $403,510 15 May 2025
Margaret Pax Director $281,090 +$37,673 +15% 15 May 2025
THOMAS F. RYAN JR Director $214,368 01 Mar 2022

Recent Insider Transactions by Companies or Individuals for REPLIGEN CORP

Insider Symbol Class Transaction % Value $ * Price $ Shares Shares Owned Date Ownership
James Bylund RGEN Common Stock Tax liability -0.35% -62 17,672 04 Mar 2026 Direct
James Bylund RGEN Common Stock Award 0.71% 125 17,734 04 Mar 2026 Direct
RALF KURIYEL RGEN Common Stock Tax liability -0.28% -42 14,778 04 Mar 2026 Direct
RALF KURIYEL RGEN Common Stock Award 0.85% 125 14,820 04 Mar 2026 Direct
James Bylund RGEN Common Stock Tax liability -12.1% -2,433 17,609 02 Mar 2026 Direct
Olivier Loeillot RGEN Common Stock Tax liability -4.53% -1,610 33,944 02 Mar 2026 Direct
Anthony Hunt RGEN Common Stock Tax liability -10% -9,897 89,062 02 Mar 2026 Direct
Jason K. Garland RGEN Common Stock Tax liability -5.48% -715 12,341 02 Mar 2026 Direct
RALF KURIYEL RGEN Common Stock Tax liability -5.91% -923 14,695 02 Mar 2026 Direct
Brian Robb Douglass RGEN Common Stock Tax liability -2.59% -221 8,319 02 Mar 2026 Direct
James Bylund RGEN Common Stock Tax liability -6.87% -1,478 20,042 27 Feb 2026 Direct
Olivier Loeillot RGEN Common Stock Tax liability -0.96% -344 35,554 27 Feb 2026 Direct
Jason K. Garland RGEN Common Stock Tax liability -2.44% -327 13,056 27 Feb 2026 Direct
RALF KURIYEL RGEN Common Stock Tax liability -2.76% -444 15,618 27 Feb 2026 Direct
Brian Robb Douglass RGEN Common Stock Award 36.6% 2,288 8,540 31 Dec 2025 Direct
Brian Robb Douglass RGEN Stock Option (Right to Buy) Award 2,143 2,143 31 Dec 2025 Direct
KAREN A. DAWES RGEN Common Stock Sale -0.3% $44,275 $161.00 -275 91,821 17 Dec 2025 Direct
GLENN P. MUIR RGEN Common Stock Options Exercise 10.1% 3,366 36,622 16 Dec 2025 Direct
GLENN P. MUIR RGEN Stock Option (Right to Buy) Options Exercise 3,366 3,366 16 Dec 2025 Direct
Anthony Hunt RGEN Common Stock Other -1.98% -2,000 98,959 04 Dec 2025 Direct
Olivier Loeillot RGEN Common Stock Sale -16.4% $1,196,970 $170.00 -7,041 35,898 25 Nov 2025 Direct
James Bylund RGEN Common Stock Sale -9.24% $331,301 $151.21 -2,191 21,520 18 Nov 2025 Direct
Anthony Hunt RGEN Common Stock Options Exercise 3.66% 2,952 83,695 13 Nov 2025 Direct
Anthony Hunt RGEN Common Stock Sale -19.8% $3,092,278 $154.61 -20,000 80,743 13 Nov 2025 Direct
Anthony Hunt RGEN Stock Option (Right to Buy) Options Exercise 25% 2,952 14,760 13 Nov 2025 Direct
Anthony Hunt RGEN Common Stock Sale -19.9% $3,921,940 $156.88 -25,000 100,743 12 Nov 2025 Direct
Anthony Hunt RGEN Common Stock Options Exercise 24.8% 25,000 125,743 12 Nov 2025 Direct
Anthony Hunt RGEN Stock Option (Right to Buy) Options Exercise -13.7% -25,000 157,344 12 Nov 2025 Direct
Olivier Loeillot RGEN Common Stock Tax liability -2.82% -1,248 42,939 02 Oct 2025 Direct
Jason K. Garland RGEN Common Stock Tax liability -2.99% -412 13,383 25 Sep 2025 Direct
Anthony Hunt RGEN Common Stock Sale -22.4% $3,508,389 $120.52 -29,111 100,743 10 Sep 2025 Direct
Anthony Hunt RGEN Common Stock Options Exercise 18.2% 20,000 129,854 10 Sep 2025 Direct
Anthony Hunt RGEN Stock Option (Right to Buy) Options Exercise -9.88% -20,000 182,344 10 Sep 2025 Direct
Olivier Loeillot RGEN Common Stock Tax liability -5.37% -2,506 44,187 03 Sep 2025 Direct
Violetta Hughes RGEN Common Stock Award 4,142 4,142 02 Sep 2025 Direct
Violetta Hughes RGEN Stock Option (Right to Buy) Award 3,914 3,914 02 Sep 2025 Direct
Martin D. Madaus RGEN Common Stock Purchase $201,830 $112.13 1,800 1,800 08 Aug 2025 By Martin D. Madaus 2011 Revocable Trust
NICOLAS BARTHELEMY RGEN Common Stock Award 28.1% 973 4,441 15 May 2025 Direct
NICOLAS BARTHELEMY RGEN Stock Option (Right to Buy) Award 1,800 1,800 15 May 2025 Direct
Konstantin Konstantinov RGEN Common Stock Award 50.6% 973 2,894 15 May 2025 Direct
Konstantin Konstantinov RGEN Stock Option (Right to Buy) Award 1,800 1,800 15 May 2025 Direct
GLENN P. MUIR RGEN Common Stock Award 3.01% 973 33,256 15 May 2025 Direct
GLENN P. MUIR RGEN Stock Option (Right to Buy) Award 1,800 1,800 15 May 2025 Direct
MANNER CARRIE EGLINTON RGEN Common Stock Award 27.9% 973 4,466 15 May 2025 Direct
MANNER CARRIE EGLINTON RGEN Stock Option (Right to Buy) Award 1,800 1,800 15 May 2025 Direct
KAREN A. DAWES RGEN Common Stock Award 1.07% 973 92,096 15 May 2025 Direct
KAREN A. DAWES RGEN Stock Option (Right to Buy) Award 1,800 1,800 15 May 2025 Direct
Martin D. Madaus RGEN Common Stock Award 21.1% 973 5,586 15 May 2025 Direct
Martin D. Madaus RGEN Stock Option (Right to Buy) Award 1,800 1,800 15 May 2025 Direct
Margaret Pax RGEN Common Stock Award 93.3% 973 2,016 15 May 2025 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.