Tradeweb Markets Inc.
US ˙ NasdaqGS ˙ US8926721064

SecurityTW / Tradeweb Markets Inc.
InstitutionCumberland Partners Ltd
Latest Disclosed Ownership11,000 shares
Latest Disclosed Value $ 1,294,260
Cumberland Partners Ltd reports 67.65% decrease in ownership of TW / Tradeweb Markets Inc.

On May 14, 2026 - Cumberland Partners Ltd filed a 13F-HR form disclosing ownership of 11,000 shares of Tradeweb Markets Inc. (US:TW) valued at $1,294,260 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 34,000 shares of Tradeweb Markets Inc.. This represents a change in shares of -67.65% during the quarter. The current value of the position is $1,106,490 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 TRADEWEB MKTS CL A 892672106 11,000 -23,000 -67.65 1,294 -64.61 0.0982
2026-02-06 2025-12-31 13F TRADEWEB MKTS CL A 892672106 34,000 -57,271 -62.75 3,656 -63.91 0.2239
2025-11-07 2025-09-30 13F TRADEWEB MKTS CL A 892672106 91,271 67,490 283.80 10,129 190.98 0.6620
2025-08-12 2025-06-30 13F TRADEWEB MKTS CL A 892672106 23,781 7,281 44.13 3,482 42.14 0.2414
2025-05-09 2025-03-31 13F TRADEWEB MKTS CL A 892672106 16,500 -3,500 -17.50 2,450 -6.46 0.1889
2025-02-03 2024-12-31 13F TRADEWEB MKTS CL A 892672106 20,000 2,000 11.11 2,618 17.61 0.1826
2024-11-05 2024-09-30 13F TRADEWEB MKTS CL A 892672106 18,000 4,000 28.57 2,226 50.00 0.1545
2024-08-13 2024-06-30 13F TRADEWEB MKTS CL A 892672106 14,000 14,000 1,484 0.1079
2023-11-08 2023-09-30 13F TRADEWEB MKTS CL A 892672106 0 -10,500 -100.00 0 -100.00
2023-08-09 2023-06-30 13F TRADEWEB MKTS CL A 892672106 10,500 10,500 719 0.0660
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.