REGENXBIO Inc.
DE ˙ DB ˙ US75901B1070
6,20 € ↓ -0,10 (-1,59%)
2026-06-02
AKTIENPREIS
SecurityDE:RB0 / REGENXBIO Inc.
InstitutionRenaissance Technologies Llc
ManagerJames Simons
Latest Disclosed Ownership305,286 shares
Latest Disclosed Value $ 2,558,297
Renaissance Technologies Llc reports 8.35% decrease in ownership of RB0 / REGENXBIO Inc.

On May 14, 2026 - Renaissance Technologies Llc filed a 13F-HR form disclosing ownership of 305,286 shares of REGENXBIO Inc. (DE:RB0) valued at $2,106,473 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 333,086 shares of REGENXBIO Inc.. This represents a change in shares of -8.35% during the quarter. The current value of the position is $1,892,773 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.

Upgrade to unlock premium data and export to Excel .

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 REGENXBIO COM 75901B107 305,286 -27,800 -8.35 2,558 -46.66 0.0040
2026-02-12 2025-12-31 13F REGENXBIO COM 75901B107 333,086 23,600 7.63 4,796 60.62 0.0074
2025-11-13 2025-09-30 13F REGENXBIO COM 75901B107 309,486 -425,714 -57.90 2,987 -50.52 0.0039
2025-08-13 2025-06-30 13F REGENXBIO COM 75901B107 735,200 438,400 147.71 6,036 184.40 0.0080
2025-05-14 2025-03-31 13F REGENXBIO COM 75901B107 296,800 25,500 9.40 2,122 1.19 0.0032
2025-02-13 2024-12-31 13F REGENXBIO COM 75901B107 271,300 271,300 2,097 0.0031
2024-08-09 2024-06-30 13F REGENXBIO COM 75901B107 0 -97,500 -100.00 0 -100.00
2024-05-13 2024-03-31 13F REGENXBIO COM 75901B107 97,500 77,900 397.45 2 0.0032
2024-02-13 2023-12-31 13F REGENXBIO COM 75901B107 19,600 19,600 0 0.0005
2023-11-14 2023-09-30 13F REGENXBIO COM 75901B107 0 -27,700 -100.00 0 0.0000
2023-08-11 2023-06-30 13F REGENXBIO COM 75901B107 27,700 27,700 1 0.0008
2021-08-13 2021-06-30 13F REGENXBIO COM 75901B107 0 -65,779 -100.00 0 -100.00
2021-05-13 2021-03-31 13F REGENXBIO COM 75901B107 65,779 65,779 2,244 0.0028
2019-11-13 2019-09-30 13F REGENXBIO COM 75901B107 0 -350,441 -100.00 0 -100.00
2019-08-12 2019-06-30 13F REGENXBIO COM 75901B107 350,441 -519,300 -59.71 18,002 -63.88 0.0158
2019-05-14 2019-03-31 13F REGENXBIO COM 75901B107 869,741 -15,202 -1.72 49,845 34.27 0.0453
2019-02-12 2018-12-31 13F REGENXBIO COM 75901B107 884,943 598,443 208.88 37,123 71.62 0.0406
2018-11-13 2018-09-30 13F REGENXBIO COM 75901B107 286,500 152,300 113.49 21,631 439.97 0.0222
2018-08-13 2018-06-30 13F REGENXBIO COM 75901B107 134,200 0 0.00 4,006 0.00 0.0044
2018-05-14 2018-03-31 13F REGENXBIO COM 75901B107 134,200 134,200 4,006 0.0044
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.