Mesa Laboratories Inc. 13F holders
159 funds reported a position in Mesa Laboratories Inc. in their 13F for the quarter ended 30 June 2026, together 5.0 million shares worth $500.8 million. Against the quarter before, 18 opened a position, 73 added, 38 trimmed and 18 sold out; together they bought a net 250,437 shares. The largest holders: Long Path Partners LP, BlackRock, Inc. and Boston Partners.
Funds holding159-2 on Q1 2026
Shares they held5.0Mworth $500.8 million
Net bought on the quarter250,437 sharesabout $24.9 million at the funds' values
Funds buying to selling91 to 56opened or added, to cut or sold
Opened 18Added 73Held 28Trimmed 38Sold out 18
What each fund did in MLAB against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in MLAB in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
3,241 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 27 reported a position in Mesa Laboratories Inc.: 6 opened one, 4 added, 4 trimmed and 3 sold out, a net 230,993 shares bought.
| Fund | Change in shares | Shares now | Status | Filing |
|---|---|---|---|---|
| Wasatch Advisors LP | +271,461 | 387,129 | added | 13F |
| Empirical Financial Services, LLC d.b.a. Empirical Wealth Management | +6,455 | 6,455 | new | 13F |
| Burns Matteson Capital Management, LLC | +2,715 | 2,715 | new | 13F |
| Sterling Capital Management LLC | +2,068 | 2,087 | added | 13F |
| State of Wyoming | +702 | 702 | new | 13F |
| DekaBank Deutsche Girozentrale | +690 | 690 | new | 13F |
| Wealth Enhancement Advisory Services, LLC | -651 | 3,624 | trimmed | 13F |
| Financial Management Professionals, Inc. | +85 | 85 | new | 13F |
| Mather Group, LLC. | +34 | 34 | new | 13F |
| Farther Finance Advisors, LLC | -31 | 381 | trimmed | 13F |
| Essential Partners LLC | -26 | 48 | trimmed | 13F |
| Gamma Investing LLC | +21 | 219 | added | 13F |
| True Wealth Design, LLC | -13 | 27 | trimmed | 13F |
| SJS Investment Consulting Inc. | +13 | 36 | added | 13F |
| Herald Investment Management Ltd | -42,500 | 0 | sold out | 13F |
| Wealth Enhancement Trust Services, Inc. | -20 | 0 | sold out | 13F |
| Y-Intercept (Hong Kong) Ltd | -10,010 | 0 | sold out | 13F |
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 6 reported a position in Mesa Laboratories Inc. in a 13F for the quarter ended 30 June 2026. The largest: Geode Capital Management, 139,682 shares worth $13.9 million, 0.0% of its reported book. In the quarter, 5 funds added or opened a position and 1 trimmed or sold out; together they bought a net 137,919 shares, about $13.7 million at the funds' own value per share on 30 June 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Geode Capital Management | 139,682 | $13.9 million | 0.0% | +11,680 | added | 30 June 2026 | 13F |
| FMR LLC | 88,857 | $8.8 million | 0.0% | +82,387 | added | 30 June 2026 | 13F |
| Citadel Advisors | 35,890 | $3.6 million | 0.0% | +27,467 | added | 30 June 2026 | 13F |
| Two Sigma Investments | 29,239 | $2.9 million | 0.0% | +12,880 | added | 30 June 2026 | 13F |
| Renaissance Technologies | 28,900 | $2.9 million | 0.0% | -2,700 | trimmed | 30 June 2026 | 13F |
| Point72 Asset Management | 22,514 | $2.2 million | 0.0% | +6,205 | added | 30 June 2026 | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| Long Path Partners LP | 477,126 | 9.48% | $47.5 million | 20.24% | +71,543 | 13F |
| BlackRock, Inc. | 440,552 | 8.76% | $43.9 million | 0.00% | +46,701 | 13F |
| Boston Partners | 265,149 | 5.27% | $26.4 million | 0.02% | -3,562 | 13F |
| Vanguard Capital Management LLC | 237,457 | 4.72% | $23.6 million | 0.00% | +4,814 | 13F |
| AQR Capital Management LLC | 203,739 | 4.05% | $20.3 million | 0.01% | +33,177 | 13F |
| Ranger Investment Management, L.P. | 173,988 | 3.46% | $17.3 million | 1.10% | -28,915 | 13F |
| Morgan Stanley | 156,979 | 3.12% | $15.6 million | 0.00% | -5,137 | 13F |
| Diamond Hill Capital Management, LLC (Investment Advisor) | 155,771 | 3.10% | $15.5 million | 0.12% | +469 | 13F |
| Raymond James Financial Inc. | 149,937 | 2.98% | $14.9 million | 0.00% | +27,026 | 13F |
| Dimensional Fund Advisors LP | 148,395 | 2.95% | $14.8 million | 0.00% | +23,765 | 13F |
| Geode Capital Management, LLC | 139,682 | 2.78% | $13.9 million | 0.00% | +11,680 | 13F |
| Kennedy Capital Management LLC | 138,301 | 2.75% | $13.8 million | 0.24% | -4,042 | 13F |
| Jacobs Levy Equity Management, Inc. | 130,838 | 2.60% | $13.0 million | 0.05% | +86,421 | 13F |
| State Street Corp. | 124,292 | 2.47% | $12.4 million | 0.00% | +2,224 | 13F |
| Russell Investments Group, Ltd. | 121,845 | 2.42% | $12.1 million | 0.01% | -13,224 | 13F |
| Wasatch Advisors LP | 115,668 | 2.30% | $11.5 million | 0.07% | +64,435 | 13F |
| Royce & Associates LP | 113,395 | 2.25% | $11.3 million | 0.09% | -47,834 | 13F |
| Crawford Investment Counsel Inc. | 98,805 | 1.96% | $9.8 million | 0.16% | +3,270 | 13F |
| FMR LLC | 88,857 | 1.77% | $8.8 million | 0.00% | +82,387 | 13F |
| D. E. Shaw & Co., Inc. | 81,755 | 1.62% | $8.1 million | 0.01% | +27,197 | 13F |
| Jane Street Group, LLC | 71,580 | 1.42% | $7.1 million | 0.01% | new | 13F |
| Vanguard Portfolio Management LLC | 69,350 | 1.38% | $6.9 million | 0.00% | +16,764 | 13F |
| Meros Investment Management, LP | 67,962 | 1.35% | $6.8 million | 2.15% | -70 | 13F |
| Northern Trust Corp. | 65,745 | 1.31% | $6.5 million | 0.00% | -3,519 | 13F |
| Goldman Sachs Group Inc. | 64,322 | 1.28% | $6.4 million | 0.00% | -6,295 | 13F |
| Gabelli Funds LLC | 62,499 | 1.24% | $6.2 million | 0.04% | no change | 13F |
| Monimus Capital Management, LP | 55,344 | 1.10% | $5.5 million | 1.40% | -45,948 | 13F |
| Charles Schwab Investment Management Inc. | 54,463 | 1.08% | $5.4 million | 0.00% | -7,961 | 13F |
| Bank of America Corp. | 49,952 | 0.99% | $5.0 million | 0.00% | -7,919 | 13F |
| Bank of New York Mellon Corp | 45,602 | 0.91% | $4.5 million | 0.00% | +1,665 | 13F |
| Herald Investment Management Ltd | 42,500 | 0.84% | $4.2 million | 0.57% | -7,500 | 13F |
| Vanguard Fiduciary Trust Co. | 39,536 | 0.79% | $3.9 million | 0.00% | +1,199 | 13F |
| Qube Research & Technologies Ltd | 37,402 | 0.74% | $3.7 million | 0.00% | new | 13F |
| Citadel Advisors LLC | 35,890 | 0.71% | $3.6 million | 0.00% | +27,467 | 13F |
| Jupiter Topco LLC | 30,996 | 0.62% | $3.1 million | 0.00% | first 13F | 13F |
| Two Sigma Investments, LP | 29,239 | 0.58% | $2.9 million | 0.00% | +12,880 | 13F |
| Renaissance Technologies LLC | 28,900 | 0.57% | $2.9 million | 0.00% | -2,700 | 13F |
| BBR Partners, LLC | 25,195 | 0.50% | $2.5 million | 0.12% | no change | 13F |
| Man Group plc | 24,070 | 0.48% | $2.4 million | 0.00% | +21,593 | 13F |
| Point72 Asset Management, L.P. | 22,514 | 0.45% | $2.2 million | 0.00% | +6,205 | 13F |
| Franklin Resources Inc. | 21,905 | 0.44% | $2.2 million | 0.00% | +352 | 13F |
| American Century Companies Inc. | 20,364 | 0.40% | $2.0 million | 0.00% | +6,991 | 13F |
| Rice Hall James & Associates, LLC | 18,968 | 0.38% | $1.9 million | 0.09% | +4,746 | 13F |
| State of Wisconsin Investment Board | 18,906 | 0.38% | $1.9 million | 0.00% | -100 | 13F |
| Segall Bryant & Hamill, LLC | 18,108 | 0.36% | $1.8 million | 0.02% | -66 | 13F |
| Numerai GP LLC | 17,769 | 0.35% | $1.8 million | 0.14% | +6,817 | 13F |
| XTX Topco Ltd | 17,475 | 0.35% | $1.7 million | 0.02% | +11,274 | 13F |
| King Luther Capital Management Corp. | 17,411 | 0.35% | $1.7 million | 0.01% | no change | 13F |
| Creative Planning | 16,615 | 0.33% | $1.7 million | 0.00% | +1,621 | 13F |
| Royal Bank of Canada | 14,803 | 0.29% | $1.5 million | 0.00% | +1,528 | 13F |
The 50 largest of the 159 funds that reported a position in MLAB in their 13F for the quarter ended 30 June 2026, by the value each reported.
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Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 27 October 2026 | 13G/A | BlackRock, Inc. and 1 other | 443,662 | 7.9% | 30 September 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 9 October 2026 | 13G | Wasatch Advisors LP and 1 other | 387,129 | 6.9% | 30 September 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 7 July 2026 | 13G/A | Long Path Smaller Companies Fund, LP and 11 others | 477,126 | 8.6% | 30 June 2026 | passive, under 20% (13d-1(c)) | EDGAR |
| 15 April 2026 | 13G/A | Long Path Smaller Companies Fund, LP and 11 others | 405,583 | 7.3% | 31 March 2026 | passive, under 20% (13d-1(c)) | EDGAR |
| 27 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 13 March 2026 | 13G | Long Path Smaller Companies Fund, LP and 11 others | 311,703 | 5.6% | 11 March 2026 | passive, under 20% (13d-1(c)) | EDGAR |
| 31 October 2025 | 13G/A | The Vanguard Group and 1 other | 321,717 | 5.8% | 30 September 2025 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 24 September 2026 | 246 | $133.01 | SEC |
| 18 September 2026 | 11 | $127.14 | SEC |
| 3 September 2026 | 5,200 | $130.65 | SEC |
| 2 September 2026 | 5,199 | $125.47 | SEC |
| 28 August 2026 | 1,366 | $128.65 | SEC |
| 27 August 2026 | 1,614 | $127.15 | SEC |
| 21 August 2026 | 218 | $119.15 | SEC |
| 20 August 2026 | 103 | $119.72 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.