MSC Industrial Direct Co., Inc.
US ˙ NYSE ˙ US5535301064

SecurityMSM / MSC Industrial Direct Co., Inc.
InstitutionSummit Trail Advisors, Llc
Latest Disclosed Ownership23,172 shares
Latest Disclosed Value $ 2,138,080
Summit Trail Advisors, Llc reports 10.35% increase in ownership of MSM / MSC Industrial Direct Co., Inc.

On May 12, 2026 - Summit Trail Advisors, Llc filed a 13F-HR form disclosing ownership of 23,172 shares of MSC Industrial Direct Co., Inc. (US:MSM) valued at $2,138,080 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 20,999 shares of MSC Industrial Direct Co., Inc.. This represents a change in shares of 10.35% during the quarter. The current value of the position is $2,715,990 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)
2026-05-12 2026-03-31 13F MSC INDL DIRECT CL A 553530106 23,172 2,173 10.35 2,138 21.06 0.0306
2026-02-17 2025-12-31 13F MSC INDL DIRECT CL A 553530106 20,999 352 1.70 1,766 -7.15 0.0305
2025-11-14 2025-09-30 13F MSC INDL DIRECT CL A 553530106 20,647 4,474 27.66 1,902 38.33 0.0263
2025-08-14 2025-06-30 13F MSC INDL DIRECT CL A 553530106 16,173 16,173 1,375 0.0236
2018-08-10 2018-06-30 13F MSC INDL DIRECT INC CL A EQUITY 553530106 0 -7,243 -100.00 0 -100.00
2018-05-22 2018-03-31 13F/A-1 MSC INDL DIRECT INC CL A EQUITY 553530106 7,243 726 11.14 517 -19.47 0.0877
2018-05-21 2018-03-31 13F MSC INDL DIRECT INC CL A EQUITY 553530106 517,023 510,506 517
2018-02-14 2017-12-31 13F MSC INDUSTRIAL DIRECT EQUITY 553530106 6,517 6,517 642 0.0811
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.