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Livermore
Livermore
ZHEN

Renaissance Technologies LLC

SEC CIK
0001037389
Latest filing
Aug 13, 2026

GBIO holding history

Generation Bio Co. in every 13F filed by Renaissance Technologies LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

GBIO overviewAll 13F holders of GBIOFull Q2 2026 holdings

Shares (Q1 2026)
0
Sold out in Q1 2026
Value
$0
% of portfolio
0.0%
Quarters held
18
Since Q2 2021
Holdings of GBIO by Renaissance Technologies LLC, by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q1 20260$00.0%−287,614−100.0%Sold outHolders
Q4 2025287,614$1.63M<0.1%−56,649−16.5%ReducedHolders
Q3 2025344,263$2.11M<0.1%+86,185+33.4%AddedConverted for a 1-for-10 splitHolders
Q2 20252,580,780$826.1K<0.1%+700,110+37.2%AddedHolders
Q1 20251,880,670$761.7K<0.1%+917,711+95.3%AddedHolders
Q4 2024962,959$1.02M<0.1%+368,659+62.0%AddedHolders
Q3 2024594,300$1.47M<0.1%−42,100−6.6%ReducedHolders
Q2 2024636,400$1.79M<0.1%−28,100−4.2%ReducedHolders
Q1 2024664,500$2.71M<0.1%−24,900−3.6%ReducedHolders
Q4 2023689,400$1.14M<0.1%+374,600+119.0%AddedHolders
Q3 2023314,800$1.19M<0.1%+6,700+2.2%AddedHolders
Q2 2023308,100$1.70M<0.1%+21,100+7.4%AddedHolders
Q1 2023287,000$1.23M<0.1%+35,000+13.9%AddedHolders
Q4 2022252,000$990.0K<0.1%−38,200−13.2%ReducedHolders
Q3 2022290,200$1.54M<0.1%+3,071+1.1%AddedHolders
Q2 2022287,129$1.88M<0.1%+214,629+296.0%AddedHolders
Q1 202272,500$532.0K<0.1%−156,400−68.3%ReducedHolders
Q4 2021228,900$1.62M<0.1%+228,900NewHolders
Q3 20210$00.0%−8,400−100.0%Sold outHolders
Q2 20218,400$226.0K<0.1%+8,400NewHolders