Geron Corporation
DE ˙ DB ˙ US3741631036
1,03 € ↑0,01 (1,23%)
2026-06-04
AKTIENPREIS
SecurityDE:GON / Geron Corporation
InstitutionRenaissance Technologies Llc
ManagerJames Simons
Latest Disclosed Ownership1,799,521 shares
Latest Disclosed Value $ 2,681,286
Renaissance Technologies Llc reports 144.11% increase in ownership of GON / Geron Corporation

On May 14, 2026 - Renaissance Technologies Llc filed a 13F-HR form disclosing ownership of 1,799,521 shares of Geron Corporation (DE:GON) valued at $2,212,511 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 737,166 shares of Geron Corporation. This represents a change in shares of 144.11% during the quarter. The current value of the position is $1,856,206 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F GERON COM 374163103 1,799,521 1,062,355 144.11 2,681 175.54 0.0042
2026-02-12 2025-12-31 13F GERON COM 374163103 737,166 -1,627,114 -68.82 973 -69.96 0.0015
2025-11-13 2025-09-30 13F GERON COM 374163103 2,364,280 -2,634,820 -52.71 3,239 -54.04 0.0043
2025-08-13 2025-06-30 13F GERON COM 374163103 4,999,100 -602,000 -10.75 7,049 -20.85 0.0094
2025-05-14 2025-03-31 13F GERON COM 374163103 5,601,100 4,148,400 285.56 8,906 73.18 0.0135
2025-02-13 2024-12-31 13F GERON COM 374163103 1,452,700 1,452,700 5,143 0.0076
2024-11-13 2024-09-30 13F GERON COM 374163103 0 -781,723 -100.00 0 -100.00
2024-08-09 2024-06-30 13F GERON COM 374163103 781,723 781,723 3,315 0.0056
2023-05-12 2023-03-31 13F GERON COM 374163103 0 -257,800 -100.00 0 0.0000
2023-02-13 2022-12-31 13F GERON COM 374163103 257,800 24,100 10.31 1 -100.00 0.0009
2022-11-14 2022-09-30 13F GERON COM 374163103 233,700 22,500 10.65 547 67.28 0.0008
2022-08-12 2022-06-30 13F GERON COM 374163103 211,200 -431,100 -67.12 327 -62.59 0.0004
2022-05-13 2022-03-31 13F GERON COM 374163103 642,300 395,600 160.36 874 190.37 0.0010
2022-02-11 2021-12-31 13F GERON COM 374163103 246,700 246,700 301 0.0004
2021-05-13 2021-03-31 13F GERON COM 374163103 0 -982,500 -100.00 0 -100.00
2021-02-10 2020-12-31 13F GERON COM 374163103 982,500 961,624 4,606.36 1,562 4,238.89 0.0017
2020-11-13 2020-09-30 13F GERON COM 374163103 20,876 -7,300 -25.91 36 -40.98 0.0000
2020-08-13 2020-06-30 13F GERON COM 374163103 28,176 28,176 34.97 61 69.44 0.0001
2020-05-14 2020-03-31 13F GERON COM 374163103 0 -57,320 -100.00 0 -100.00
2020-02-13 2019-12-31 13F GERON COM 374163103 57,320 57,320 78 0.0001
2018-05-14 2018-03-31 13F GERON COM 374163103 0 -872,115 -100.00 0 -100.00
2018-02-13 2017-12-31 13F GERON COM 374163103 872,115 222,235 34.20 1,570 10.80 0.0017
2017-11-13 2017-09-30 13F GERON COM 374163103 649,880 126,500 24.17 1,417 -2.28 0.0017
2017-08-11 2017-06-30 13F GERON COM 374163103 523,380 162,233 44.92 1,450 76.83 0.0019
2017-05-12 2017-03-31 13F GERON COM 374163103 361,147 361,147 -31.00 820 -43.45 0.0011
2017-02-13 2016-12-31 13F GERON COM 374163103 0 -515,380 -100.00 0 -100.00
2016-11-14 2016-09-30 13F GERON COM 374163103 515,380 53,800 11.66 1,165 -5.82 0.0021
2016-08-12 2016-06-30 13F GERON COM 374163103 461,580 8,100 1.79 1,237 -6.57 0.0024
2016-05-13 2016-03-31 13F GERON COM 374163103 453,480 453,480 -1.75 1,324 7.03 0.0025
2016-02-11 2015-12-31 13F GERON COM 374163103 0 0 0 0.0000
2015-11-12 2015-09-30 13F GERON COM 374163103 0 -1,505,880 -100.00 0 -100.00
2015-08-14 2015-06-30 13F GERON COM 374163103 1,505,880 70,735 4.93 6,445 19.13 0.0147
2015-05-13 2015-03-31 13F GERON COM 374163103 1,435,145 1,005,265 233.85 5,410 287.26 0.0115
2015-02-13 2014-12-31 13F GERON COM 374163103 429,880 429,880 -70.05 1,397 -74.18 0.0034
2014-02-14 2013-12-31 13F GERON COM 374163103 0 -86,580 -100.00 0 -100.00
2013-11-13 2013-09-30 13F GERON COM 374163103 86,580 -1,010,462 -92.11 290 -82.38 0.0007
2013-08-12 2013-06-30 13F GERON COM 374163103 1,097,042 1,097,042 1,646 0.0043
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.