Kathryn A Walker

CIK 1264261 · View on SEC EDGAR ↗

Insider

First SEC filing: July 11, 2022 · Latest: July 11, 2022

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Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 77 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

No open-market trades on record; showing all filings.

Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Dec. 31, 2025 ADTN A 13,809 — — 98,663 Direct +16.27% Acquired (price as of 2026-08-20)
Dec. 31, 2024 ADTN A 14,406 — — 84,854 Direct +20.45% Acquired (price as of 2026-08-20)
Dec. 31, 2023 ADTN M 168 — — 0 Direct -100.00% Disposed (price as of 2026-08-20)
Dec. 31, 2023 ADTN A 16,349 — — 70,448 Direct +30.22% Acquired (price as of 2026-08-20)
Dec. 31, 2023 ADTN D 0 $7.34 — 54,099 Direct 0.00% Disposed 9.7% (price as of 2026-08-20)
Dec. 31, 2023 ADTN M 168 — — 54,099 Direct +0.31% Acquired (price as of 2026-08-20)
Sept. 5, 2023 ADTN A 69 $8.37 $578 168 Direct +69.70% Acquired -3.8% (price as of 2026-08-20)
June 6, 2023 ADTN A 63 $9.14 $576 99 Direct +175.00% Acquired -11.9% (price as of 2026-08-20)
March 21, 2023 ADTN A 36 $15.96 $575 36 Direct — Acquired -49.6% (price as of 2026-08-20)
Jan. 24, 2023 ADTN A 1,629 — — 53,931 Direct +3.11% Acquired (price as of 2026-08-20)
Dec. 31, 2022 ADTN M 69 — — 0 Direct -100.00% Disposed (price as of 2026-08-20)
Dec. 31, 2022 ADTN A 4,790 — — 52,302 Direct +10.08% Acquired (price as of 2026-08-20)
Dec. 31, 2022 ADTN D 0 $18.79 — 47,512 Direct 0.00% Disposed -57.2% (price as of 2026-08-20)
Dec. 31, 2022 ADTN M 69 — — 47,512 Direct +0.15% Acquired (price as of 2026-08-20)
Dec. 6, 2022 ADTN A 18 $19.38 $349 69 Direct +35.29% Acquired -58.5% (price as of 2026-08-20)
Sept. 1, 2022 ADTN A 16 $22.70 $363 47,494 Direct +0.03% Acquired -64.5% (price as of 2026-08-20)
July 8, 2022 ADTN A 47,479 — — 47,479 Direct — Acquired (price as of 2026-08-20)
July 8, 2022 ADTN D 47,479 — — 0 Direct -100.00% Disposed (price as of 2026-08-20)
June 2, 2022 ADTN A 18 $19.69 $354 36 Direct +100.00% Acquired -59.1% (price as of 2026-08-20)
March 3, 2022 ADTN A 18 $20.27 $365 18 Direct — Acquired -60.3% (price as of 2026-08-20)
Dec. 31, 2021 ADTN M 114 — — 0 Direct -100.00% Disposed (price as of 2026-08-20)
Dec. 31, 2021 ADTN A 3,943 — — 47,443 Direct +9.06% Acquired (price as of 2026-08-20)
Dec. 31, 2021 ADTN D 0 $22.83 — 43,500 Direct 0.00% Disposed -64.7% (price as of 2026-08-20)
Dec. 31, 2021 ADTN M 114 — — 43,500 Direct +0.26% Acquired (price as of 2026-08-20)
Nov. 30, 2021 ADTN A 27 — — 114 Direct +31.03% Acquired (price as of 2026-08-20)
Sept. 2, 2021 ADTN A 26 — — 88 Direct +41.94% Acquired (price as of 2026-08-20)
June 3, 2021 ADTN A 27 — — 61 Direct +79.41% Acquired (price as of 2026-08-20)
March 4, 2021 ADTN A 34 — — 34 Direct — Acquired (price as of 2026-08-20)
Dec. 31, 2020 ADTN M 318 — — 0 Direct -100.00% Disposed (price as of 2026-08-20)
Dec. 31, 2020 ADTN A 6,094 — — 43,386 Direct +16.34% Acquired (price as of 2026-08-20)
Dec. 31, 2020 ADTN D 0 $14.77 — 37,292 Direct 0.00% Disposed -45.5% (price as of 2026-08-20)
Dec. 31, 2020 ADTN M 318 — — 37,292 Direct +0.86% Acquired (price as of 2026-08-20)
Dec. 1, 2020 ADTN A 65 — — 318 Direct +25.69% Acquired (price as of 2026-08-20)
Sept. 3, 2020 ADTN A 79 — — 253 Direct +45.40% Acquired (price as of 2026-08-20)
June 4, 2020 ADTN A 72 — — 174 Direct +70.59% Acquired (price as of 2026-08-20)
Dec. 31, 2018 ADTN M 111 — — 0 Direct -100.00% Disposed (price as of 2026-08-20)
Dec. 31, 2018 ADTN A 8,318 — — 29,412 Direct +39.43% Acquired (price as of 2026-08-20)
Dec. 31, 2018 ADTN D 1 $10.74 $11 21,094 Direct 0.00% Disposed -25.0% (price as of 2026-08-20)
Dec. 31, 2018 ADTN M 111 — — 21,095 Direct +0.53% Acquired (price as of 2026-08-20)
Nov. 14, 2018 ADTN A 31 — — 111 Direct +38.75% Acquired (price as of 2026-08-20)
Aug. 15, 2018 ADTN A 26 — — 80 Direct +48.15% Acquired (price as of 2026-08-20)
May 16, 2018 ADTN A 28 — — 54 Direct +107.69% Acquired (price as of 2026-08-20)
Feb. 14, 2018 ADTN A 26 — — 26 Direct — Acquired (price as of 2026-08-20)
Dec. 31, 2017 ADTN M 70 — — 0 Direct -100.00% Disposed (price as of 2026-08-20)
Dec. 31, 2017 ADTN A 4,651 — — 20,984 Direct +28.48% Acquired (price as of 2026-08-20)
Dec. 31, 2017 ADTN D 1 $19.35 $19 16,333 Direct -0.01% Disposed -58.4% (price as of 2026-08-20)
Dec. 31, 2017 ADTN M 70 — — 16,334 Direct +0.43% Acquired (price as of 2026-08-20)
Nov. 15, 2017 ADTN A 17 — — 70 Direct +32.08% Acquired (price as of 2026-08-20)
Aug. 17, 2017 ADTN A 17 — — 52 Direct +48.57% Acquired (price as of 2026-08-20)
May 18, 2017 ADTN A 19 — — 35 Direct +118.75% Acquired (price as of 2026-08-20)
Feb. 16, 2017 ADTN A 17 — — 17 Direct — Acquired (price as of 2026-08-20)
Dec. 31, 2016 ADTN M 90 — — 0 Direct -100.00% Disposed (price as of 2026-08-20)
Dec. 31, 2016 ADTN A 4,027 — — 16,264 Direct +32.91% Acquired (price as of 2026-08-20)
Dec. 31, 2016 ADTN D 1 $22.35 $22 12,237 Direct -0.01% Disposed -64.0% (price as of 2026-08-20)
Dec. 31, 2016 ADTN M 90 — — 12,238 Direct +0.74% Acquired (price as of 2026-08-20)
Nov. 17, 2016 ADTN A 21 — — 90 Direct +30.43% Acquired (price as of 2026-08-20)
Aug. 11, 2016 ADTN A 23 — — 68 Direct +51.11% Acquired (price as of 2026-08-20)
May 12, 2016 ADTN A 22 — — 45 Direct +95.65% Acquired (price as of 2026-08-20)
Feb. 18, 2016 ADTN A 23 — — 23 Direct — Acquired (price as of 2026-08-20)
Dec. 31, 2015 ADTN M 76 — — 0 Direct — Acquired (price as of 2026-08-20)
Dec. 31, 2015 ADTN A 4,646 — — 12,148 Direct +61.93% Acquired (price as of 2026-08-20)
Dec. 31, 2015 ADTN D 0 $17.22 — 7,502 Direct 0.00% Disposed -53.3% (price as of 2026-08-20)
Dec. 31, 2015 ADTN M 76 — — 7,502 Direct +1.02% Acquired (price as of 2026-08-20)
Nov. 12, 2015 ADTN A 21 — — 76 Direct +38.18% Acquired (price as of 2026-08-20)
Aug. 13, 2015 ADTN A 21 — — 55 Direct +61.76% Acquired (price as of 2026-08-20)
May 21, 2015 ADTN A 20 — — 34 Direct +142.86% Acquired (price as of 2026-08-20)
May 14, 2015 ADTN D 34 $16.64 $566 14 Direct — Acquired -51.6% (price as of 2026-08-20)
May 14, 2015 ADTN M 0 $16.64 — 5,572 Direct 0.00% Disposed -51.6% (price as of 2026-08-20)
May 14, 2015 ADTN M 24 — — 5,572 Direct +0.43% Acquired (price as of 2026-08-20)
Feb. 19, 2015 ADTN A 22 — — 38 Direct +137.50% Acquired (price as of 2026-08-20)
Dec. 31, 2014 ADTN A 3,670 — — 7,426 Direct +97.71% Acquired (price as of 2026-08-20)
Nov. 13, 2014 ADTN A 9 — — 17 Direct +112.50% Acquired (price as of 2026-08-20)
Nov. 13, 2014 ADTN M 18 — — 0 Direct — Acquired (price as of 2026-08-20)
Aug. 14, 2014 ADTN A 8 — — 8 Direct — Acquired (price as of 2026-08-20)
Aug. 14, 2014 ADTN M 15 — — 0 Direct — Acquired (price as of 2026-08-20)
May 14, 2014 ADTN A 1,878 — — 1,878 Direct — Acquired (price as of 2026-08-20)
May 14, 2014 ADTN A 3,756 — — 3,756 Direct — Acquired (price as of 2026-08-20)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date Ticker Security Underlying Exercise price Expiration Shares A/D
Dec. 31, 2023 ADTN Dividend Equivalent Rights Common Stock (168) — — 168 Disposed
Sept. 5, 2023 ADTN Dividend Equivalent Rights Common Stock (69) — — 69 Acquired
June 6, 2023 ADTN Dividend Equivalent Rights Common Stock (63) — — 63 Acquired
March 21, 2023 ADTN Dividend Equivalent Rights Common Stock (36) — — 36 Acquired
Dec. 31, 2022 ADTN Dividend Equivalent Rights Common Stock (69) — — 69 Disposed
Dec. 6, 2022 ADTN Dividend Equivalent Rights Common Stock (18) — — 18 Acquired
June 2, 2022 ADTN Dividend Equivalent Rights Common Stock (18) — — 18 Acquired
March 3, 2022 ADTN Dividend Equivalent Rights Common Stock (18) — — 18 Acquired
Dec. 31, 2021 ADTN Dividend Equivalent Rights Common Stock (114) — — 114 Disposed
Nov. 30, 2021 ADTN Dividend Equivalent Rights Common Stock (27) — — 27 Acquired
Sept. 2, 2021 ADTN Dividend Equivalent Rights Common Stock (26) — — 26 Acquired
June 3, 2021 ADTN Dividend Equivalent Rights Common Stock (27) — — 27 Acquired
March 4, 2021 ADTN Dividend Equivalent Rights Common Stock (34) — — 34 Acquired
Dec. 31, 2020 ADTN Dividend Equivalent Rights Common Stock (318) — — 318 Disposed
Dec. 1, 2020 ADTN Dividend Equivalent Rights Common Stock (65) — — 65 Acquired
Sept. 3, 2020 ADTN Dividend Equivalent Rights Common Stock (79) — — 79 Acquired
June 4, 2020 ADTN Dividend Equivalent Rights Common Stock (72) — — 72 Acquired
Dec. 31, 2018 ADTN Dividend Equivalent Rights Common Stock (111) — — 111 Disposed
Nov. 14, 2018 ADTN Dividend Equivalent Rights Common Stock (31) — — 31 Acquired
Aug. 15, 2018 ADTN Dividend Equivalent Rights Common Stock (26) — — 26 Acquired
May 16, 2018 ADTN Dividend Equivalent Rights Common Stock (28) — — 28 Acquired
Feb. 14, 2018 ADTN Dividend Equivalent Rights Common Stock (26) — — 26 Acquired
Dec. 31, 2017 ADTN Dividend Equivalent Rights Common Stock (70) — — 70 Disposed
Nov. 15, 2017 ADTN Dividend Equivalent Rights Common Stock (17) — — 17 Acquired
Aug. 17, 2017 ADTN Dividend Equivalent Rights Common Stock (17) — — 17 Acquired
May 18, 2017 ADTN Dividend Equivalent Rights Common Stock (19) — — 19 Acquired
Feb. 16, 2017 ADTN Dividend Equivalent Rights Common Stock (17) — — 17 Acquired
Dec. 31, 2016 ADTN Dividend Equivalent Rights Common Stock (90) — — 90 Disposed
Nov. 17, 2016 ADTN Dividend Equivalent Rights Common Stock (90) — — 21 Acquired
Aug. 11, 2016 ADTN Dividend Equivalent Rights Common Stock (23) — — 23 Acquired
May 12, 2016 ADTN Dividend Equivalent Rights Common Stock (22) — — 22 Acquired
Feb. 18, 2016 ADTN Dividend Equivalent Rights Common Stock (23) — — 23 Acquired
Dec. 31, 2015 ADTN Dividend Equivalent Rights Common Stock (76) — — 76 Acquired
Nov. 12, 2015 ADTN Dividend Equivalent Rights Common Stock (21) — — 21 Acquired
Aug. 13, 2015 ADTN Dividend Equivalent Rights Common Stock (21) — — 21 Acquired
May 21, 2015 ADTN Dividend Equivalent Rights Common Stock (20) — — 20 Acquired
May 14, 2015 ADTN Dividend Equivalent Rights Common Stock (34) — — 34 Acquired
Feb. 19, 2015 ADTN Dividend Equivalent Rights Common Stock (22) — — 22 Acquired
Nov. 13, 2014 ADTN Dividend Equivalent Rights Common Stock (9) — — 9 Acquired
Nov. 13, 2014 ADTN Dividend Equivalent Rights Common Stock (33) — — 18 Acquired
Aug. 14, 2014 ADTN Dividend Equivalent Rights Common Stock (8) — — 8 Acquired
Aug. 14, 2014 ADTN Dividend Equivalent Rights Common Stock (15) — — 15 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 1 holding

Securities held when first becoming an insider, per SEC Form 3.

Date Ticker Security Shares Ownership
July 11, 2022 ADTN No securities are beneficially owned 0 Direct