Northern Technologies International
Supplies corrosion-prevention products and bio-based, compostable polymer materials through global operations.
$8.13
After-hours close+0.09 (+1.12%)
At close$8.04(−0.37%)
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Breakdown13F · Form 4
Institutions 32.13%3.05M sharesInsiders 4.04%383.1K sharesOther 63.83%6.06M shares
Shares outstanding 9.49M · Float 7.83M · 82.5% free float
Institutions13F, as of Mar 31, 2026
47 holders · 3.05M shares · 7 new positions · 14 increased · 16 reduced · 9 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| Needham Investment Management LLC | 765.0K | 8.06% | +51.7K | May 15, 2026 |
| Vanguard Capital Management LLC | 383.8K | 4.04% | +383.8Knew | May 15, 2026 |
| Dimensional Fund Advisors LP | 333.4K | 3.51% | −4.8K | May 7, 2026 |
| Meros Investment Management, LP | 206.3K | 2.17% | −6.1K | May 14, 2026 |
| Ballast Advisors LLC | 171.0K | 1.80% | 0 | Jun 23, 2026 |
| North Star Investment Management Corp. | 148.0K | 1.56% | +148.0Knew | Apr 23, 2026 |
| Peapod Lane Capital LLC | 142.6K | 1.50% | +21 | May 4, 2026 |
| Renaissance Technologies LLC | 118.8K | 1.25% | −7.6K | May 14, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Needham Investment Management L.L.C. | 8.10% | 765.0K | 13G | May 14, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Matthew C. Wolsfeld | officer: CFO and Corporate Secretary | 171.0K | 1.80% | Jul 2, 2026 |
| G. Patrick Lynch | director, 10 percent owner, officer: President and CEO | 105.3K | 1.11% | Jul 31, 2026 |
| Richard Nigon | director | 47.1K | 0.50% | Jul 21, 2026 |
| Konstantin von Falkenhausen | director | 18.2K | 0.19% | May 6, 2025 |
| Sarah E. Kemp | director | 16.3K | 0.17% | Sep 3, 2025 |
| Nancy E. Calderon | director | 14.7K | 0.16% | Sep 3, 2025 |
| Cristina Lucia Duarte Pinho | director | 10.5K | 0.11% | Sep 3, 2025 |
1 ten-percent owner holds 1.20M shares by Form 4, outside the officers-and-directors figure above · 11 people have not refiled in the last 18 months (411.6K shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Jul 30, 2026 | G. Patrick Lynchdirector, 10 percent owner, officer: President and CEO | Sale | 16,070 | $8.00 | 105,284 |
| Jul 29, 2026 | G. Patrick Lynchdirector, 10 percent owner, officer: President and CEO | Sale | 2 | $8.10 | 121,354 |
| Jul 20, 2026 | Richard Nigondirector | Sale | 12,000 | $8.00 | 47,148 |
CongressHouse and Senate disclosures
Not reported.