REGENXBIO Inc.
US ˙ NasdaqGS ˙ US75901B1070

SecurityRGNX / REGENXBIO Inc.
InstitutionSquarepoint Ops LLC
Latest Disclosed Ownership16,981 shares
Latest Disclosed Value $ 142,301
Squarepoint Ops LLC reports 60.43% decrease in ownership of RGNX / REGENXBIO Inc.

On May 15, 2026 - Squarepoint Ops LLC filed a 13F-HR form disclosing ownership of 16,981 shares of REGENXBIO Inc. (US:RGNX) valued at $142,301 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 42,918 shares of REGENXBIO Inc.. This represents a change in shares of -60.43% during the quarter. The current value of the position is $113,603 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)
2026-05-15 2026-03-31 13F REGENXBIO COM 75901B107 16,981 -25,937 -60.43 142 -77.02 0.0002
2026-02-13 2025-12-31 13F REGENXBIO COM 75901B107 42,918 -163,489 -79.21 618 -68.96 0.0007
2025-11-14 2025-09-30 13F REGENXBIO COM 75901B107 206,407 -12,881 -5.87 1,992 10.61 0.0020
2025-08-27 2025-06-30 13F/A-1 REGENXBIO COM 75901B107 219,288 209,084 2,049.04 1,800 2,400.00 0.0019
2025-08-14 2025-06-30 13F REGENXBIO COM 75901B107 219,288 209,084 1,800 0.0019
2025-08-27 2025-03-31 13F/A-1 REGENXBIO COM 75901B107 10,204 -27,026 -72.59 73 -74.91 0.0001
2025-05-15 2025-03-31 13F REGENXBIO COM 75901B107 10,204 -27,026 73 0.0001
2025-02-14 2024-12-31 13F REGENXBIO COM 75901B107 37,230 -2,475 -6.23 288 -31.01 0.0003
2024-11-14 2024-09-30 13F REGENXBIO COM 75901B107 39,705 -106,554 -72.85 417 -75.69 0.0007
2024-08-14 2024-06-30 13F REGENXBIO COM 75901B107 146,259 126,249 630.93 1,711 306.41 0.0028
2024-05-15 2024-03-31 13F REGENXBIO COM 75901B107 20,010 20,010 422 0.0007
2024-02-14 2023-12-31 13F REGENXBIO COM 75901B107 0 -41,592 -100.00 0 -100.00
2023-11-14 2023-09-30 13F REGENXBIO COM 75901B107 41,592 41,592 685 0.0017
2022-02-14 2021-12-31 13F REGENXBIO COM 75901B107 0 -47,605 -100.00 0 -100.00
2021-11-15 2021-09-30 13F REGENXBIO COM 75901B107 47,605 20,463 75.39 1,996 89.37 0.0057
2021-08-16 2021-06-30 13F REGENXBIO COM 75901B107 27,142 4,776 21.35 1,054 38.14 0.0040
2021-05-17 2021-03-31 13F REGENXBIO COM 75901B107 22,366 5,127 29.74 763 -2.43 0.0045
2021-02-16 2020-12-31 13F REGENXBIO COM 75901B107 17,239 -28,342 -62.18 782 -37.64 0.0058
2020-11-16 2020-09-30 13F REGENXBIO COM 75901B107 45,581 21,425 88.69 1,254 40.90 0.0169
2020-08-14 2020-06-30 13F REGENXBIO COM 75901B107 24,156 14,660 154.38 890 189.90 0.0144
2020-05-15 2020-03-31 13F REGENXBIO COM 75901B107 9,496 -33,484 -77.91 307 -82.57 0.0079
2020-02-14 2019-12-31 13F REGENXBIO COM 75901B107 42,980 8,055 23.06 1,761 41.67 0.0105
2019-11-14 2019-09-30 13F REGENXBIO COM 75901B107 34,925 34,925 1,243 0.0111
2019-08-14 2019-06-30 13F REGENXBIO COM 75901B107 0 -60,537 -100.00 0 -100.00
2019-05-15 2019-03-31 13F REGENXBIO COM 75901B107 60,537 32,192 113.57 3,469 191.76 0.0367
2019-02-14 2018-12-31 13F REGENXBIO COM 75901B107 28,345 28,345 1,189 0.0138
2018-11-14 2018-09-30 13F REGENXBIO COM 75901B107 0 -6,725 -100.00 0 -100.00
2018-08-14 2018-06-30 13F REGENXBIO COM 75901B107 6,725 -19,384 -74.24 483 -38.00 0.0064
2018-05-15 2018-03-31 13F REGENXBIO COM 75901B107 26,109 -9,312 -26.29 779 -33.87 0.0124
2018-02-14 2017-12-31 13F REGENXBIO COM 75901B107 35,421 35,421 1,178 0.0205
2017-05-15 2017-03-31 13F REGENXBIO COM 75901B107 0 -12,038 -100.00 0 -100.00
2017-02-14 2016-12-31 13F REGENXBIO COM 75901B107 12,038 12,038 223 0.0091
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.