Beam Therapeutics Inc.
US ˙ NasdaqGS ˙ US07373V1052

SecurityBEAM / Beam Therapeutics Inc.
InstitutionVestmark Advisory Solutions, Inc.
Latest Disclosed Ownership176,865 shares
Latest Disclosed Value $ 4,214,693
Vestmark Advisory Solutions, Inc. reports 9.78% decrease in ownership of BEAM / Beam Therapeutics Inc.

On May 15, 2026 - Vestmark Advisory Solutions, Inc. filed a 13F-HR form disclosing ownership of 176,865 shares of Beam Therapeutics Inc. (US:BEAM) valued at $4,214,693 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 196,036 shares of Beam Therapeutics Inc.. This represents a change in shares of -9.78% during the quarter. The current value of the position is $5,226,361 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 176,865 -19,171 -9.78 4,215 -22.45 0.0290
2026-02-06 2025-12-31 13F BEAM THERAPEUTICS COM 07373V105 196,036 29,739 17.88 5,434 34.64 0.0733
2025-11-10 2025-09-30 13F BEAM THERAPEUTICS COM 07373V105 166,297 -156,703 -48.51 4,036 -26.54 0.0769
2025-08-06 2025-06-30 13F BEAM THERAPEUTICS COM 07373V105 323,000 168,479 109.03 5,494 82.10 0.0793
2025-05-13 2025-03-31 13F BEAM THERAPEUTICS COM 07373V105 154,521 -18,631 -10.76 3,018 -32.69 0.0777
2025-02-06 2024-12-31 13F BEAM THERAPEUTICS COM 07373V105 173,152 39,250 29.31 4,482 36.65 0.1544
2024-11-14 2024-09-30 13F BEAM THERAPEUTICS COM 07373V105 133,902 50,323 60.21 3,281 67.52 0.1221
2024-08-12 2024-06-30 13F BEAM THERAPEUTICS COM 07373V105 83,579 -31,207 -27.19 1,958 -48.36 0.0818
2024-05-15 2024-03-31 13F BEAM THERAPEUTICS COM 07373V105 114,786 16,571 16.87 3,793 41.86 0.1633
2024-02-06 2023-12-31 13F BEAM THERAPEUTICS COM 07373V105 98,215 98,215 2,673 0.1358
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.