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Livermore
Livermore
ZHEN

D. E. Shaw & Co., Inc.

SEC CIK
0001009207
Latest filing
Aug 14, 2026

RGEN holding history

Repligen Corp in every 13F filed by D. E. Shaw & Co., Inc., including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

RGEN overviewAll 13F holders of RGENFull Q2 2026 holdings

Shares (Q2 2026)
83,328
Value
$11.4M
% of portfolio
<0.1%
Quarters held
17
Since Q1 2021
Holdings of RGEN by D. E. Shaw & Co., Inc., by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q2 202683,328$11.4M<0.1%+83,328NewHolders
Q4 20250$00.0%−249,930−100.0%Sold outHolders
Q3 2025249,930$33.4M<0.1%+244,298+4,337.7%AddedHolders
Q2 20255,632$700.5K<0.1%+3,020+115.6%AddedHolders
Q1 20252,612$332.4K<0.1%−2,447−48.4%ReducedHolders
Q4 20245,059$728.2K<0.1%+5,059NewHolders
Q3 20240$00.0%−6,369−100.0%Sold outHolders
Q2 20246,369$802.9K<0.1%−119,042−94.9%ReducedHolders
Q1 2024125,411$23.1M<0.1%+42,926+52.0%AddedHolders
Q4 202382,485$14.8M<0.1%+67,905+465.7%AddedHolders
Q3 202314,580$2.32M<0.1%+3,159+27.7%AddedHolders
Q2 202311,421$1.62M<0.1%+11,421NewHolders
Q1 20230$00.0%−5,379−100.0%Sold outHolders
Q4 20225,379$910.7K<0.1%−213−3.8%ReducedHolders
Q3 20225,592$1.05M<0.1%−4,210−43.0%ReducedHolders
Q2 20229,802$1.59M<0.1%+4,833+97.3%AddedHolders
Q1 20224,969$935.0K<0.1%+1,330+36.5%AddedHolders
Q4 20213,639$964.0K<0.1%−9,231−71.7%ReducedHolders
Q3 202112,870$3.72M<0.1%+12,870NewHolders
Q2 20210$00.0%−5,576−100.0%Sold outHolders
Q1 20215,576$1.08M<0.1%––Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.