MLAB
Mesa Laboratories, Inc. · Healthcare · Medical - Specialties
Momentum inputs (comparable managers):
holder breadth +12.5% ·
share flow +0.2% ·
net new positions +11.1%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 67 | 0 | 2.99M | $297.50M | +4 | −4 |
| Q1 2026 | 70 | 0 | 2.66M | $235.21M | +6 | −6 |
| Q4 2025 | 70 | +2 | 2.73M | $214.06M | +2 | — |
| Q3 2025 | 17 | +1 | 1.54M | $103.48M | +2 | −1 |
| Q2 2025 | 13 | +4 | 1.73M | $163.31M | +4 | — |
| Q1 2025 | 6 | -3 | 383.09K | $45.46M | — | −3 |
| Q4 2024 | 9 | +1 | 400.64K | $52.84M | +1 | — |
| Q3 2024 | 7 | 0 | 174.94K | $22.72M | +1 | −1 |
| Q2 2024 | 7 | — | 189.52K | $16.45M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | State Street Global Advisors ✦ (passive) | 224.90K | — | $29.66M | 0.0% | n/c | 1 | SEC ↗ |
| 2 | Geode Capital Management ✦ (passive) | 124.45K | -0.2% | $16.42M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 124.45K | -0.2% | $16.42M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 4 | Wellington Management ✦ | 14.31K | New | $1.89M | 0.0% | New | 1 | SEC ↗ |
| 5 | Wellington Management ✦ | 14.31K | New | $1.89M | 0.0% | New | 1 | SEC ↗ |
| 6 | AQR Capital Management ✦ | 10.88K | -4.8% | $1.44M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 7 | AQR Capital Management ✦ | 10.88K | -4.8% | $1.44M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 8 | Renaissance Technologies ✦ | 7.50K | -44.0% | $989,025 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 9 | Citadel Advisors ✦ | 6.82K | -36.4% | $898,958 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 10 | Millennium Management ✦ | 4.83K | +61.0% | $637,196 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 11 | Marshall Wace ✦ | 3.48K | -59.4% | $458,381 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 12 | T. Rowe Price ✦ | 3.47K | +12.7% | $458,000 | 0.0% | ▲ Add | 3 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Wellington Management | $1.89M | 0.0% |
| Wellington Management | $1.89M | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 158 holders, 4.82M shares, $424.86M reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
Officer · President and CEO · 7.09K sh @ 112.80 · $800,090
Director · 900 sh @ 113.69 · $102,321
Open-market sales (S)
Director · 7.09K sh · $800,090
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology