Mesa Laboratories, Inc.
US ˙ NasdaqGS ˙ US59064R1095

SecurityMLAB / Mesa Laboratories, Inc.
InstitutionRoyce Value Trust Inc
Latest Disclosed Ownership93,188 shares
Latest Disclosed Value $ 8,780,173
Royce Value Trust Inc ownership in MLAB / Mesa Laboratories, Inc.

On August 15, 2025 - Royce Value Trust Inc filed a NPORT-P form disclosing ownership of 93,188 shares of Mesa Laboratories, Inc. (US:MLAB) valued at $8,780,173 USD as of June 30, 2025. The entity filed a previous NPORT-P on May 19, 2025 disclosing 93,188 shares of Mesa Laboratories, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $9,681,301 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)
2025-08-15 2025-06-30 NP Mesa Laboratories EC US59064R1095 93,188 0 0.00 8,780 -20.59 0.4383
2025-05-19 2025-03-31 NP Mesa Laboratories EC US59064R1095 93,188 -407 -0.43 11,058 -10.41 0.6009
2025-02-21 2024-12-31 NP Mesa Laboratories EC US59064R1095 93,595 -8,498 -8.32 12,342 -6.90 0.6176
2024-11-19 2024-09-30 NP Mesa Laboratories EC US59064R1095 102,093 -19,022 -15.71 13,258 26.15 0.6562
2024-08-12 2024-06-30 NP Mesa Laboratories EC US59064R1095 121,115 35,818 41.99 10,509 12.29 0.5508
2024-05-28 2024-03-31 NP Mesa Laboratories EC US59064R1095 85,297 3,264 3.98 9,360 8.90 0.4784
2024-02-20 2023-12-31 NP Mesa Laboratories EC US59064R1095 82,033 37,433 83.93 8,595 83.40 0.4611
2023-11-22 2023-09-30 NP Mesa Laboratories EC US59064R1095 44,600 5,000 12.63 4,686 -7.90 0.2817
2023-08-09 2023-06-30 NP Mesa Laboratories EC US59064R1095 39,600 0 0.00 5,089 -26.46 0.2902
2023-05-19 2023-03-31 NP Mesa Laboratories EC US59064R1095 39,600 -1,815 -4.38 6,919 0.52 0.4100
2023-02-21 2022-12-31 NP Mesa Laboratories EC US59064R1095 41,415 -1,245 -2.92 6,884 14.58 0.4288
2022-11-17 2022-09-30 NP Mesa Laboratories EC US59064R1095 42,660 8,060 23.29 6,008 -14.87 0.4070
2022-08-16 2022-06-30 NP Mesa Laboratories EC US59064R1095 34,600 -51,352 -59.74 7,056 -67.79 0.4461
2022-05-16 2022-03-31 NP Mesa Laboratories EC US59064R1095 85,952 10,240 13.52 21,907 -11.81 1.1424
2022-02-24 2021-12-31 NP Mesa Laboratories EC US59064R1095 75,712 3,572 4.95 24,840 13.88 1.1554
2021-11-22 2021-09-30 NP Mesa Laboratories EC US59064R1095 72,140 2,930 4.23 21,812 16.23 1.0480
2021-08-24 2021-06-30 NP Mesa Laboratories EC US59064R1095 69,210 13,050 23.24 18,768 37.25 0.8661
2021-05-17 2021-03-31 NP Mesa Laboratories EC US59064R1095 56,160 1,260 2.30 13,675 -13.10 0.6546
2021-02-19 2020-12-31 NP Mesa Laboratories EC US59064R1095 54,900 0 0.00 15,737 12.51 0.8332
2020-11-24 2020-09-30 NP Mesa Laboratories EC US59064R1095 54,900 1,000 1.86 13,986 19.69 0.9258
2020-08-19 2020-06-30 NP Mesa Laboratories EC US59064R1095 53,900 15,300 39.64 11,686 33.89 0.8114
2020-05-27 2020-03-31 NP Mesa Laboratories EC US59064R1095 38,600 0 0.00 8,727 -9.34 0.7797
2020-02-19 2019-12-31 NP Mesa Laboratories EC 59064R109 38,600 300 0.78 9,627 5.71 0.5912
2019-11-25 2019-09-30 NP Mesa Laboratories EC US59064R1095 38,300 38,300 9,107 0.6079
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.