Briggs Lori 4

4 · NPK International Inc. · Filed Jun 3, 2026

AI-generated summary of this filing

Updated Jun 3, 2026

NPK International (NPKI) VP Lori Briggs Receives RSUs, Sells Shares

What Happened

Lori Briggs, VP & President, Industrial Solutions at NPK International (NPKI), had 24,340 restricted stock units (RSUs vest) convert into shares on 2026-06-01. To cover tax withholding she had 21,755 shares withheld (three withhold events at $14.31 each totaling $311,314). Separately, 10,446 shares were sold in the open market on 2026-06-02 under a Rule 10b5-1 plan for a weighted average price of $14.58, netting $152,278.

Key Details

Vesting/conversion: 24,340 RSUs converted to 24,340 shares on 2026-06-01 (one-for-one conversion; footnote: RSUs vest and settle in shares).
Tax withholding dispositions (6/1): 5,401 shares @ $14.31 = $77,288; 9,577 shares @ $14.31 = $137,047; 6,777 shares @ $14.31 = $96,979 (total withheld = 21,755 shares; $311,314).
Open-market sale (6/2): 10,446 shares sold under an automatic Rule 10b5-1 plan adopted 12/15/2025; weighted average price $14.58; aggregate proceeds $152,278. Reported sale prices ranged $14.33–$14.74.
Filing: Form 4 filed 2026-06-03 reporting transactions on 6/1–6/2; filing appears timely (within required reporting window).
Shares owned after transaction: Not specified in the provided filing.

Context

These transactions reflect RSU vesting and standard tax-withholding (F = tax withholding) rather than an out‑of‑the‑ordinary market sale by the insider. The open‑market sale was automatic under a pre-established 10b5‑1 plan. For RSU vesting, some or all of the new shares were withheld to meet tax obligations (common settlement practice), and remaining shares may be retained or sold per the insider’s plan.

Form 4

Period: 2026-06-01

VP & President, Ind. Solutions

Transactions

Tax Payment
Common Stock
[F1]
2026-06-01$14.31/sh−5,401$77,288→ 257,950 total
Tax Payment
Common Stock
[F1]
2026-06-01$14.31/sh−9,577$137,047→ 248,373 total
Tax Payment
Common Stock
[F1]
2026-06-01$14.31/sh−6,777$96,979→ 241,596 total
Exercise/Conversion
Common Stock
[F2]
2026-06-01+24,340→ 265,936 total
Sale
Common Stock
[F3][F4]
2026-06-02$14.58/sh−10,446$152,278→ 255,490 total
Exercise/Conversion
Restricted Stock Units
[F2][F5]
2026-06-01−24,340→ 0 total
Exercise: $0.00→ Common Stock (24,340 underlying)

Footnotes (5)

[F1]Represents shares withheld to satisfy tax withholding obligations upon the vesting of restricted stock units.
[F2]The restricted stock units vest and convert into shares on a one-for-one basis.
[F3]The reported sale of 10,446 shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 15, 2025.
[F4]The price reported is the weighted average price. These shares were sold in multiple transactions in the open market at prices ranging from $14.33 to $14.74, inclusive. The reporting person undertakes to provide to NPK International Inc., any security holder of NPK International Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) to this Form 4.
[F5]Grant of restricted stock units that vest in one-third increments on June 1 of each subsequent year after grant and settle in shares.

Signature

By: M. Celeste Fruge For: Lori Briggs|2026-06-03

1 file