Jim Simons Generation Bio Co. Transaction History

Renaissance Technologies LLC

$70.6 Billion
Q2 2025

A detailed history of Jim Simons (Renaissance Technologies LLC) transactions in Generation Bio Co. stock. As of the latest transaction made, Renaissance Technologies LLC holds 2,580,780 shares of GBIO stock, worth $10.5 Million. This represents 0.0% of its overall portfolio holdings.

Number of Shares

2,580,780

Previous 1,880,670 37.23%

Holding current value

$10.5 Million

Previous $752,000 9.71%

% of portfolio

0.0%

Previous 0.0%

17 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q2 2025 Aug 13, 2025	BUY	$0.32 - $0.45 $224,035 - $315,049	700,110 Added 37.23%	2,580,780 $825,000
Q1 2025 May 14, 2025	BUY	$0.4 - $1.15 $367,084 - $1.06 Million	917,711 Added 95.3%	1,880,670 $752,000
Q4 2024 Feb 13, 2025	BUY	$1.02 - $2.51 $376,032 - $925,334	368,659 Added 62.03%	962,959 $1.02 Million
Q3 2024 Nov 13, 2024	SELL	$2.16 - $3.51 $90,936 - $147,771	-42,100 Reduced 6.62%	594,300 $1.47 Million
Q2 2024 Aug 09, 2024	SELL	$2.64 - $4.35 $74,184 - $122,234	-28,100 Reduced 4.23%	636,400 $1.79 Million
Q1 2024 May 13, 2024	SELL	$1.73 - $4.07 $43,077 - $101,343	-24,900 Reduced 3.61%	664,500 $2.71 Million
Q4 2023 Feb 13, 2024	BUY	$0.91 - $3.35 $340,886 - $1.25 Million	374,600 Added 119.0%	689,400 $1.14 Million
Q3 2023 Nov 14, 2023	BUY	$3.65 - $6.9 $24,455 - $46,230	6,700 Added 2.17%	314,800 $1.19 Million
Q2 2023 Aug 11, 2023	BUY	$3.5 - $5.67 $73,850 - $119,637	21,100 Added 7.35%	308,100 $1.7 Million
Q1 2023 May 12, 2023	BUY	$3.61 - $7.01 $126,350 - $245,350	35,000 Added 13.89%	287,000 $1.23 Million
Q4 2022 Feb 13, 2023	SELL	$3.66 - $6.77 $139,812 - $258,613	-38,200 Reduced 13.16%	252,000 $990,000
Q3 2022 Nov 14, 2022	BUY	$4.68 - $8.34 $14,372 - $25,612	3,071 Added 1.07%	290,200 $1.54 Million
Q2 2022 Aug 12, 2022	BUY	$4.87 - $9.41 $1.05 Million - $2.02 Million	214,629 Added 296.04%	287,129 $1.88 Million
Q1 2022 May 13, 2022	SELL	$4.16 - $7.76 $650,624 - $1.21 Million	-156,400 Reduced 68.33%	72,500 $532,000
Q4 2021 Feb 11, 2022	BUY	$5.99 - $24.97 $1.37 Million - $5.72 Million	228,900 New	228,900 $1.62 Million
Q3 2021 Nov 12, 2021	SELL	$20.0 - $27.43 $168,000 - $230,412	-8,400 Closed	0 $0
Q2 2021 Aug 13, 2021	BUY	$24.34 - $38.34 $204,456 - $322,056	8,400 New	8,400 $226,000

Others Institutions Holding GBIO

# of Institutions

Shares Held

40.9M

Call Options Held

116K

Put Options Held

View Full List

About Generation Bio Co.

Ticker GBIO
Exchange NASDAQ
Sector Healthcare
Industry Biotechnology
Shares Outstandng 59,011,200
Market Cap $239M
Description
Generation Bio Co., a genetic medicines company, develops therapies for the treatment of rare and prevalent diseases. The company provides a portfolio of programs, including programs for rare and prevalent diseases of the liver and retina. It also focuses on the diseases of skeletal muscle, central nervous system, and oncology. The company was f...

More about GBIO

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