Samuel M Zentman

CIK 1309349 · View on SEC EDGAR ↗

Insider

First SEC filing: Jan. 3, 2024 · Latest: Jan. 3, 2024

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Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 43 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

43 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Dec. 17, 2010 ACFN P 5,000 $3.70 $18,500 44,121 Direct +12.78% Acquired -67.5% (price as of 2026-08-21)
Dec. 17, 2010 ACFN P 5,000 $3.50 $17,500 44,121 Direct +12.78% Acquired -65.6% (price as of 2026-08-21)
Oct. 20, 2010 ACFN P 5,000 $4.45 $22,250 39,121 Direct +14.65% Acquired -72.9% (price as of 2026-08-21)
Sept. 10, 2008 ACFN P 10,000 $3.81 $38,100 15,297 Direct +188.79% Acquired -68.4% (price as of 2026-08-21)
Sept. 10, 2008 ACFN P 10,000 $3.81 $38,100 20,000 Direct +100.00% Acquired -68.4% (price as of 2026-08-21)
July 31, 2006 ACFN P 5,297 $2.65 $14,037 5,297 Direct — Acquired -54.6% (price as of 2026-08-21)
July 31, 2006 ACFN P 1,324 — — 1,324 Direct — Acquired (price as of 2026-08-21)

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. 10, 2025 GRMLW Non-Qualified Stock Option Common Stock (20,000) $0.41 Jan. 16, 2035 20,000 Acquired
Aug. 7, 2025 GRMLW Non-Qualified Stock Option Common Stock (10,000) $0.41 Jan. 16, 2035 10,000 Acquired
Jan. 1, 2024 ACFN stock options [F1] common stock (625) $6.09 — 625 Acquired
Jan. 3, 2023 ACFN stock options [F1] common stock (10,000) $0.35 — 10,000 Acquired
Nov. 22, 2022 ACFN stock options common stock (10,000) $0.14 Jan. 1, 2023 10,000 Disposed
Jan. 1, 2022 ACFN stock options [F1] common stock (10,000) $0.63 — 10,000 Acquired
Jan. 1, 2021 ACFN stock options [F1] common stock (10,000) $0.37 — 10,000 Acquired
Jan. 8, 2020 ACFN stock options [F1] common stock (10,000) $0.38 — 10,000 Acquired
June 24, 2019 ACFN subscription rights (right to buy) common stock — June 24, 2019 61,445 Disposed
Feb. 5, 2019 ACFN stock options [F1] common stock (10,000) $0.31 — 10,000 Acquired
Jan. 1, 2018 ACFN stock options [F1] common stock (10,000) $0.23 — 10,000 Acquired
Jan. 1, 2017 ACFN stock options [F1] common stock (10,000) $0.18 — 10,000 Acquired
April 1, 2016 ACFN stock options [F1] common stock (10,000) $0.14 — 10,000 Acquired
Sept. 23, 2014 ACFN stock options [F1] common stock (57,663) $1.68 Sept. 23, 2021 57,663 Acquired
Jan. 1, 2014 ACFN stock options [F1] common stock (16,255) $4.07 Jan. 1, 2021 16,255 Acquired
Dec. 1, 2013 ACFN stock options common stock (25,000) $3.35 Nov. 30, 2013 25,000 Disposed
Sept. 20, 2013 ACFN stock options [F1] common stock (16,506) $6.31 Sept. 20, 2020 16,506 Acquired
Dec. 21, 2012 ACFN stock options common stock (7,500) $3.28 Oct. 3, 2013 7,500 Disposed
Sept. 11, 2012 ACFN stock options [F1] common stock (10,000) $8.83 Sept. 11, 2019 10,000 Acquired
Oct. 17, 2011 ACFN stock options [F1] common stock (10,000) $5.37 Oct. 17, 2018 10,000 Acquired
March 30, 2011 ACFN stock options common stock (25,000) $2.65 March 30, 2011 25,000 Disposed
June 10, 2010 ACFN Stock Options [F1] Common Stock (10,000) $5.00 June 10, 2017 10,000 Acquired
May 5, 2010 ACFN stock options common stock (7,500) $0.88 Nov. 16, 2014 7,500 Disposed
May 5, 2010 ACFN stock options common stock (10,000) $2.24 Nov. 3, 2015 10,000 Disposed
Nov. 5, 2009 ACFN warrant common stock (1,324) $2.78 July 31, 2011 1,324 Disposed
Aug. 4, 2009 ACFN Stock Options [F1] Common Stock (10,000) $4.75 Aug. 4, 2016 10,000 Acquired
Dec. 5, 2007 ACFN stock options [F1] common stock (10,000) $4.20 Dec. 5, 2014 10,000 Acquired
Nov. 30, 2006 ACFN Stock Option Common Stock (25,000) $3.35 Nov. 30, 2013 25,000 Acquired
Oct. 3, 2006 ACFN Stock Option Common Stock (7,500) $3.28 Oct. 3, 2013 7,500 Acquired
July 31, 2006 ACFN Warrant Common Stock (1,324) $2.78 July 31, 2011 1,324 Acquired
March 27, 2006 ACFN Stock Option Common Stock (25,000) $2.65 — 25,000 Acquired
Nov. 16, 2004 ACFN Stock Option Common Stock (7,500) $0.88 Nov. 16, 2014 7,500 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
Nov. 22, 2004 ACFN No Securities Owned 0 Direct