Arkolith/Insider Trading/PRLB/Form 4

Kenison Michael R.

Chief Operations OfficerProto Labs Inc (PRLB) · full profile →Form 4 · filed May 13, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$1.6M
Net Open-Market Flow
-$1.6M
Transactions
15
10 non-derivative · 5 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
May 12, 2026Sell(S)4K$68.70$288K29K
May 12, 2026Sell(S)4K$69.78$250K25K
May 12, 2026Sell(S)7K$70.30$467K19K
May 12, 2026Option exercise(M)2K$33.84$65K29K
May 12, 2026Option exercise(M)2K$39.61$62K31K
May 12, 2026Option exercise(M)4K$59.40$240K35K
May 12, 2026Sell(S)2K$67.58$109K33K
May 11, 2026Option exercise(M)4K$33.84$127K31K
May 11, 2026Option exercise(M)4K$33.52$123K35K
May 11, 2026Sell(S)7K$70.26$522K27K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
May 12, 2026Option exercise(M)2K—$02K
May 12, 2026Option exercise(M)2K—$05K
May 12, 2026Option exercise(M)4K—$00
May 11, 2026Option exercise(M)4K—$04K
May 11, 2026Option exercise(M)4K—$04K

Transaction Codes

S
Open-market sale
M
Option exercise / conversion

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001628280-26-034651) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML