Proto Labs Inc
Total Trades
4
Buys
0
Sells
3
Largest Trade
$100K–$500K
Insiders
1
Institutional Funds
187
Inst. Value
$1M+
Activist Filings
25
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Kenison Michael R. | Chief Operations O… | SELL | $100K–$500K | 5K | $66.46 | Feb 18, 2026 |
| Kenison Michael R. | Chief Operations O… | SELL | $100K–$500K | 3K | $60.00 | Feb 9, 2026 |
| Kenison Michael R. | Chief Operations O… | EXERCISE | $100K–$500K | 3K | $33.84 | Nov 26, 2025 |
| Kenison Michael R. | Chief Operations O… | SELL | $100K–$500K | 3K | $50.17 | Nov 26, 2025 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 187 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| DIMENSIONAL FUND ADVISORS LP | 1.2M | $1M+ | SH |
| Rubric Capital Management LP | 1.1M | $1M+ | SH |
| STATE STREET CORP | 1.1M | $1M+ | SH |
| AMERICAN CAPITAL MANAGEMENT INC | 631K | $1M+ | SH |
| RENAISSANCE TECHNOLOGIES LLC | 494K | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 481K | $1M+ | SH |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 461K | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 363K | $1M+ | SH |
| S Squared Technology, LLC | 306K | $1M+ | SH |
| JUPITER ASSET MANAGEMENT LTD | 195K | $1M+ | SH |
| PANAGORA ASSET MANAGEMENT INC | 176K | $1M+ | SH |
| Hillsdale Investment Management Inc. | 168K | $1M+ | SH |
| PRUDENTIAL FINANCIAL INC | 156K | $1M+ | SH |
| PRINCIPAL FINANCIAL GROUP INC | 136K | $1M+ | SH |
| Connor, Clark & Lunn Investment Management Ltd. | 131K | $1M+ | SH |
| GOLDMAN SACHS GROUP INC | 122K | $1M+ | SH |
| Empowered Funds, LLC | 113K | $1M+ | SH |
| GAGNON SECURITIES LLC | 112K | $1M+ | SH |
| PUBLIC SECTOR PENSION INVESTMENT BOARD | 110K | $1M+ | SH |
| FIRST TRUST ADVISORS LP | 106K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
DISCIPLINED GROWTH INVESTORS INC /MN
SC 13G/A · Feb 17, 2026
11.3%
2.7M shares
DISCIPLINED GROWTH INVESTORS INC /MN
SC 13G/A · Nov 14, 2025
10.9%
2.6M shares
DISCIPLINED GROWTH INVESTORS INC /MN
SC 13G/A · Aug 14, 2025
11.4%
2.7M shares
SC 13G/A · Jul 18, 2025
15.0%
3.6M shares
DISCIPLINED GROWTH INVESTORS INC /MN
SC 13G/A · May 15, 2025
11.2%
2.7M shares
DISCIPLINED GROWTH INVESTORS INC /MN
SC 13G/A · Feb 14, 2025
8.9%
2.2M shares
SC 13G · Jan 23, 2025
5.3%
1.3M shares
DISCIPLINED GROWTH INVESTORS INC /MN
SC 13G/A · Nov 14, 2024
8.4%
2.1M shares
SC 13G/A · Nov 8, 2024
16.0%
4.0M shares
SC 13G/A · Oct 18, 2024
16.0%
4.0M shares
Disciplined Growth Investors, Inc.
SC 13G/A · Feb 14, 2024
6.7%
1.7M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
11.3%
2.9M shares
SC 13G/A · Jan 22, 2024
17.3%
4.5M shares
Disciplined Growth Investors, Inc.
SC 13G/A · Feb 14, 2023
7.8%
2.1M shares
SC 13G/A · Feb 14, 2023
2.7%
731K shares
SC 13G/A · Jan 23, 2023
17.9%
4.9M shares
The Vanguard Group - 23-1945930
SC 13G/A · Mar 9, 2022
10.8%
3.0M shares
Disciplined Growth Investors, Inc.
SC 13G · Feb 14, 2022
6.5%
1.8M shares
SC 13G/A · Feb 14, 2022
0.0%
0 shares
SC 13G/A · Feb 14, 2022
6.3%
1.7M shares
Nikko Asset Management Americas, Inc.
SC 13G/A · Feb 14, 2022
3.3%
912K shares
SC 13G/A · Jan 27, 2022
18.0%
5.0M shares
SC 13G/A · Jan 26, 2022
18.0%
5.0M shares
Riverbridge Partners LLC 41-1930193
SC 13G/A · Jan 21, 2022
1.6%
436K shares
Riverbridge Partners LLC 41-1930193
SC 13G/A · Jan 21, 2022
1.6%
436K shares