Mesa Laboratories, Inc.
US ˙ NasdaqGS ˙ US59064R1095

SecurityMLAB / Mesa Laboratories, Inc.
InstitutionUs Bancorp \de\
Latest Disclosed Ownership1,461 shares
Latest Disclosed Value $ 129,182
Us Bancorp \de\ reports 9.27% increase in ownership of MLAB / Mesa Laboratories, Inc.

On May 14, 2026 - Us Bancorp \de\ filed a 13F-HR form disclosing ownership of 1,461 shares of Mesa Laboratories, Inc. (US:MLAB) valued at $129,182 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 1,337 shares of Mesa Laboratories, Inc.. This represents a change in shares of 9.27% during the quarter. The current value of the position is $158,928 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 MESA LABS COM 59064R109 1,461 124 9.27 129 24.04 0.0000
2026-01-30 2025-12-31 13F MESA LABS COM 59064R109 1,337 635 90.46 105 121.28 0.0001
2025-11-12 2025-09-30 13F MESA LABS COM 59064R109 702 -513 -42.22 47 -58.77 0.0001
2025-07-24 2025-06-30 13F MESA LABS COM 59064R109 1,215 -108 -8.16 114 -26.92 0.0001
2025-05-08 2025-03-31 13F MESA LABS COM 59064R109 1,323 431 48.32 157 33.33 0.0002
2025-02-05 2024-12-31 13F MESA LABS COM 59064R109 892 -106 -10.62 118 -9.30 0.0002
2024-10-28 2024-09-30 13F MESA LABS COM 59064R109 998 -53 -5.04 130 41.76 0.0002
2024-08-07 2024-06-30 13F MESA LABS COM 59064R109 1,051 -20 -1.87 91 -22.22 0.0001
2024-05-08 2024-03-31 13F MESA LABS COM 59064R109 1,071 -860 -44.54 118 -42.08 0.0002
2024-02-09 2023-12-31 13F MESA LABS COM 59064R109 1,931 124 6.86 202 6.88 0.0003
2023-11-03 2023-09-30 13F MESA LABS COM 59064R109 1,807 191 11.82 190 -8.70 0.0003
2023-08-10 2023-06-30 13F MESA LABS COM 59064R109 1,616 -1,087 -40.21 208 -56.14 0.0003
2023-05-09 2023-03-31 13F MESA LABS COMMON STOCK 59064R109 2,703 -2,632 -49.33 472 -46.73 0.0008
2023-02-13 2022-12-31 13F MESA LABS COMMON STOCK 59064R109 5,335 -3,219 -37.63 887 -26.47 0.0016
2022-10-27 2022-09-30 13F MESA LABS COMMON STOCK 59064R109 8,554 -3,663 -29.98 1,205 -51.61 0.0025
2022-08-01 2022-06-30 13F MESA LABS COMMON STOCK 59064R109 12,217 90 0.74 2,490 -19.47 0.0048
2022-05-11 2022-03-31 13F MESA LABS COMMON STOCK 59064R109 12,127 657 5.73 3,092 -17.83 0.0051
2022-02-11 2021-12-31 13F MESA LABS COMMON STOCK 59064R109 11,470 -56 -0.49 3,763 7.98 0.0059
2021-11-10 2021-09-30 13F MESA LABS COMMON STOCK 59064R109 11,526 824 7.70 3,485 20.09 0.0066
2021-08-05 2021-06-30 13F MESA LABS COMMON STOCK 59064R109 10,702 -143 -1.32 2,902 9.92 0.0054
2021-04-28 2021-03-31 13F MESA LABS COMMON STOCK 59064R109 10,845 957 9.68 2,640 -6.85 0.0053
2021-02-04 2020-12-31 13F MESA LABS COMMON STOCK 59064R109 9,888 75 0.76 2,834 13.36 0.0061
2020-11-10 2020-09-30 13F MESA LABS COMMON STOCK 59064R109 9,813 6,175 169.74 2,500 217.26 0.0061
2020-08-07 2020-06-30 13F MESA LABS COMMON STOCK 59064R109 3,638 596 19.59 788 14.53 0.0021
2020-05-13 2020-03-31 13F MESA LABS COMMON STOCK 59064R109 3,042 1,283 72.94 688 56.72 0.0021
2020-02-04 2019-12-31 13F MESA LABS COMMON STOCK 59064R109 1,759 404 29.82 439 36.34 0.0011
2019-11-08 2019-09-30 13F MESA LABS COMMON STOCK 59064R109 1,355 -10 -0.73 322 -3.59 0.0009
2019-08-13 2019-06-30 13F MESA LABS COMMON STOCK 59064R109 1,365 -10 -0.73 334 5.70 0.0009
2019-05-08 2019-03-31 13F MESA LABS COMMON STOCK 59064R109 1,375 -165 -10.71 316 -1.56 0.0009
2019-02-13 2018-12-31 13F MESA LABS COMMON STOCK 59064R109 1,540 -25 -1.60 321 10.31 0.0010
2018-10-31 2018-09-30 13F MESA LABS COMMON STOCK 59064R109 1,565 -450 -22.33 291 -31.69 0.0008
2018-08-08 2018-06-30 13F MESA LABS COMMON STOCK 59064R109 2,015 0 0.00 426 42.47 0.0013
2018-05-08 2018-03-31 13F MESA LABS COMMON STOCK 59064R109 2,015 0 0.00 299 19.12 0.0009
2018-02-02 2017-12-31 13F MESA LABS COMMON STOCK 59064R109 2,015 0 0.00 251 -16.33 0.0008
2017-11-13 2017-09-30 13F MESA LABS COMMON STOCK 59064R109 2,015 0 0.00 300 4.17 0.0010
2017-07-19 2017-06-30 13F MESA LABS COMMON STOCK 59064R109 2,015 -190 -8.62 288 6.27 0.0010
2017-05-03 2017-03-31 13F MESA LABS COMMON STOCK 59064R109 2,205 0 0.00 271 0.00 0.0009
2017-02-08 2016-12-31 13F MESA LABS COMMON STOCK 59064R109 2,205 1,200 119.40 271 135.65 0.0010
2016-11-04 2016-09-30 13F MESA LABS COMMON STOCK 59064R109 1,005 15 1.52 115 -5.74 0.0004
2016-08-10 2016-06-30 13F MESA LABS COMMON STOCK 59064R109 990 65 7.03 122 37.08 0.0005
2016-05-13 2016-03-31 13F MESA LABS COMMON STOCK 59064R109 925 -51 -5.23 89 -8.25 0.0003
2016-02-10 2015-12-31 13F MESA LABS COMMON STOCK 59064R109 976 0 0.00 97 -11.01 0.0004
2015-11-16 2015-09-30 13F MESA LABS COMMON STOCK 59064R109 976 0 0.00 109 25.29 0.0005
2015-08-10 2015-06-30 13F MESA LABS COMMON STOCK 59064R109 976 0 0.00 87 22.54 0.0003
2015-05-08 2015-03-31 13F MESA LABS COMMON STOCK 59064R109 976 51 5.51 71 -1.39 0.0003
2015-02-13 2014-12-31 13F MESA LABS COMMON STOCK 59064R109 925 0 0.00 72 35.85 0.0003
2014-11-14 2014-09-30 13F MESA LABS COMMON STOCK 59064R109 925 0 0.00 53 -32.05 0.0002
2014-08-14 2014-06-30 13F MESA LABS COMMON STOCK 59064R109 925 0 0.00 78 -6.02 0.0003
2014-05-14 2014-03-31 13F MESA LABS COMMON STOCK 59064R109 925 500 117.65 83 151.52 0.0003
2014-02-13 2013-12-31 13F MESA LABS COMMON STOCK 59064R109 425 425 33 0.0001
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.