Beam Therapeutics Inc.
US ˙ NasdaqGS ˙ US07373V1052

SecurityBEAM / Beam Therapeutics Inc.
InstitutionXTX Topco Ltd
Latest Disclosed Ownership52,061 shares
Latest Disclosed Value $ 1,240,614
XTX Topco Ltd reports 239.01% increase in ownership of BEAM / Beam Therapeutics Inc.

On May 15, 2026 - XTX Topco Ltd filed a 13F-HR form disclosing ownership of 52,061 shares of Beam Therapeutics Inc. (US:BEAM) valued at $1,240,614 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 15,357 shares of Beam Therapeutics Inc.. This represents a change in shares of 239.01% during the quarter. The current value of the position is $1,709,683 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 BEAM THERAPEUTICS COM 07373V105 52,061 36,704 239.01 1,241 191.76 0.0216
2026-02-17 2025-12-31 13F BEAM THERAPEUTICS COM 07373V105 15,357 15,357 426 0.0112
2025-02-13 2024-12-31 13F BEAM THERAPEUTICS COM 07373V105 0 -37,001 -100.00 0 -100.00
2024-11-14 2024-09-30 13F BEAM THERAPEUTICS COM 07373V105 37,001 5,191 16.32 907 21.61 0.0655
2024-08-12 2024-06-30 13F BEAM THERAPEUTICS COM 07373V105 31,810 31,810 745 0.0638
2024-02-13 2023-12-31 13F BEAM THERAPEUTICS COM 07373V105 0 -23,404 -100.00 0 -100.00
2023-11-13 2023-09-30 13F BEAM THERAPEUTICS COM 07373V105 23,404 14,625 166.59 563 100.71 0.0961
2023-08-14 2023-06-30 13F BEAM THERAPEUTICS COM 07373V105 8,779 1,517 20.89 280 26.13 0.0502
2023-05-12 2023-03-31 13F BEAM THERAPEUTICS COM 07373V105 7,262 7,262 222 0.0466
2023-02-14 2022-12-31 13F BEAM THERAPEUTICS COM 07373V105 0 -4,524 -100.00 0 -100.00
2022-11-14 2022-09-30 13F BEAM THERAPEUTICS COM 07373V105 4,524 4,524 216 0.0535
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.