Mesa Laboratories, Inc.
US ˙ NasdaqGS ˙ US59064R1095

SecurityMLAB / Mesa Laboratories, Inc.
InstitutionTrexquant Investment LP
Latest Disclosed Ownership18,661 shares
Latest Disclosed Value $ 1,650,006
Trexquant Investment LP reports 59.54% decrease in ownership of MLAB / Mesa Laboratories, Inc.

On May 15, 2026 - Trexquant Investment LP filed a 13F-HR form disclosing ownership of 18,661 shares of Mesa Laboratories, Inc. (US:MLAB) valued at $1,650,006 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 46,121 shares of Mesa Laboratories, Inc.. This represents a change in shares of -59.54% during the quarter. The current value of the position is $1,938,691 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 MESA LABS COM 59064R109 18,661 -27,460 -59.54 1,650 -54.42 0.0119
2026-02-17 2025-12-31 13F MESA LABS COM 59064R109 46,121 21,031 83.82 3,620 115.35 0.0323
2025-11-14 2025-09-30 13F MESA LABS COM 59064R109 25,090 21,070 524.13 1,681 344.71 0.0173
2025-08-12 2025-06-30 13F MESA LABS COM 59064R109 4,020 4,020 379 0.0043
2023-11-13 2023-09-30 13F MESA LABS COM 59064R109 0 -2,408 -100.00 0 -100.00
2023-08-11 2023-06-30 13F MESA LABS COM 59064R109 2,408 861 55.66 309 14.44 0.0081
2023-05-15 2023-03-31 13F MESA LABS COM 59064R109 1,547 1,547 270 0.0074
2021-08-12 2021-06-30 13F MESA LABS COM 59064R109 0 -1,796 -100.00 0 -100.00
2021-05-13 2021-03-31 13F MESA LABS COM 59064R109 1,796 949 112.04 437 79.84 0.0401
2021-02-11 2020-12-31 13F MESA LABS COM 59064R109 847 847 243 0.0257
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.