John Robert Wilson

CIK 1755569 · View on SEC EDGAR ↗

Insider Activist

First SEC filing: July 30, 2020 · Latest: Aug. 20, 2025

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Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 11 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

11 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
March 16, 2021 MRKR P 1,714,285 $1.75 $2,999,999 7,799,350 Direct +28.17% Acquired -93.2% (price as of 2026-08-19)
March 11, 2021 KLRS S 10b5-1 769 $31.63 $24,323 3,164,954 Indirect -0.02% Disposed -99.4% (price as of 2026-08-19)
March 11, 2021 KLRS S 10b5-1 2,308 $31.63 $73,002 5,412,953 Indirect -0.04% Disposed -99.4% (price as of 2026-08-19)
March 11, 2021 KLRS S 10b5-1 3,397 $30.87 $104,865 3,165,723 Indirect -0.11% Disposed -99.4% (price as of 2026-08-19)
March 11, 2021 KLRS S 10b5-1 10,188 $30.87 $314,504 5,415,261 Indirect -0.19% Disposed -99.4% (price as of 2026-08-19)
March 10, 2021 KLRS S 10b5-1 300 $32.31 $9,693 3,169,120 Indirect -0.01% Disposed -99.4% (price as of 2026-08-19)
March 10, 2021 KLRS S 10b5-1 900 $32.31 $29,079 5,425,449 Indirect -0.02% Disposed -99.4% (price as of 2026-08-19)
March 10, 2021 KLRS S 10b5-1 8,419 $31.59 $265,956 3,169,420 Indirect -0.26% Disposed -99.4% (price as of 2026-08-19)
March 10, 2021 KLRS S 10b5-1 25,256 $31.59 $797,837 5,426,349 Indirect -0.46% Disposed -99.4% (price as of 2026-08-19)
March 10, 2021 KLRS S 10b5-1 9,467 $30.93 $292,814 3,177,839 Indirect -0.30% Disposed -99.4% (price as of 2026-08-19)
March 10, 2021 KLRS S 10b5-1 28,403 $30.93 $878,505 5,451,605 Indirect -0.52% Disposed -99.4% (price as of 2026-08-19)
March 9, 2021 KLRS S 10b5-1 10,169 $31.70 $322,357 3,187,306 Indirect -0.32% Disposed -99.4% (price as of 2026-08-19)
March 9, 2021 KLRS S 10b5-1 30,506 $31.70 $967,040 5,480,008 Indirect -0.55% Disposed -99.4% (price as of 2026-08-19)
March 9, 2021 KLRS S 10b5-1 17,480 $31.30 $547,124 3,197,475 Indirect -0.54% Disposed -99.4% (price as of 2026-08-19)
March 9, 2021 KLRS S 10b5-1 52,440 $31.30 $1,641,372 5,510,514 Indirect -0.94% Disposed -99.4% (price as of 2026-08-19)

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
June 6, 2023 MRKR Stock Option (right to buy) Common Stock (8,000) $1.72 June 5, 2033 8,000 Acquired
May 24, 2022 MRKR Stock Option (Right to Buy) Common Stock (80,000) $0.34 May 23, 2032 80,000 Acquired
May 25, 2021 KLRS Stock Option (Right to Buy) Common Stock (22,500) $21.51 May 24, 2031 22,500 Acquired
Aug. 3, 2020 KLRS Series A-3 Convertible Preferred Stock Common Stock (2,347,999) — — 3,499,001 Disposed
Aug. 3, 2020 KLRS Series A-3 Convertible Preferred Stock Common Stock (3,184,758) — — 4,745,943 Disposed
July 29, 2020 KLRS Stock Option (Right to Buy) Common Stock (22,500) $17.00 July 29, 2030 22,500 Acquired
Oct. 17, 2018 MRKR Non-Employee Director Stock Option (Right to Buy) [F1] Common Stock (12,500) $8.34 — 12,500 Acquired

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

Initial ownership (Form 3) 5 holdings

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

Date Ticker Security Shares Ownership
July 30, 2020 KLRS Common Stock 30,197 Direct
July 30, 2020 KLRS Series A-3 Convertible Preferred Stock→ Common Stock (3,184,758) 3,184,758 Direct
July 30, 2020 KLRS Series A-3 Convertible Preferred Stock→ Common Stock (2,347,999) 2,347,999 Indirect
Oct. 19, 2018 MRKR Common Stock 6,060,783 Direct
Oct. 19, 2018 MRKR Warrants to Acquire Common Stock→ Common Stock (2,197,944) 2,197,944 Direct