John Z Zhang

CIK 1825618 · View on SEC EDGAR ↗

Insider

First SEC filing: Oct. 9, 2020 · Latest: May 12, 2026

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Insider at

Insider transactions

0 buys (P) 3 sells (S) Net: $-4,958,221 + 85 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

85 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
May 11, 2026 GLW S 10,000 $198.34 $1,983,400 5,138 Direct -66.06% Disposed -22.6% (price as of 2026-08-21)
May 6, 2026 GLW S 15,000 $184.67 $2,770,050 15,138 Direct -49.77% Disposed -16.8% (price as of 2026-08-21)
Feb. 12, 2026 GLW S 1,531 $133.75 $204,771 0 Direct -100.00% Disposed 14.8% (price as of 2026-08-21)
Aug. 12, 2025 GLW S 1,212 $65.53 $79,422 0 Direct -100.00% Disposed 134.3% (price as of 2026-08-21)
May 28, 2025 GLW S 9,610 $49.29 $473,677 0 Direct -100.00% Disposed 211.5% (price as of 2026-08-21)
May 12, 2025 GLW S 8,000 $46.91 $375,280 9,610 Direct -45.43% Disposed 227.4% (price as of 2026-08-21)
Feb. 18, 2025 GLW S 14,111 $52.78 $744,779 0 Direct -100.00% Disposed 190.9% (price as of 2026-08-21)
Nov. 13, 2024 GLW S 5,175 $48.36 $250,263 0 Direct -100.00% Disposed 217.5% (price as of 2026-08-21)
Aug. 13, 2024 GLW S 12,918 $39.73 $513,232 0 Direct -100.00% Disposed 286.5% (price as of 2026-08-21)
May 2, 2024 GLW S 12,546 $33.42 $419,287 11,355 Direct -52.49% Disposed 359.5% (price as of 2026-08-21)
Feb. 15, 2024 GLW S 6,607 $32.02 $211,556 12,546 Direct -34.50% Disposed 379.6% (price as of 2026-08-21)
May 5, 2023 GLW S 15,000 $31.45 $471,750 12,546 Direct -54.45% Disposed 388.3% (price as of 2026-08-21)
Feb. 16, 2023 GLW S 5,744 $35.52 $204,027 0 Direct -100.00% Disposed 332.3% (price as of 2026-08-21)
Feb. 3, 2023 GLW S 4,655 $36.00 $167,580 5,744 Direct -44.76% Disposed 326.6% (price as of 2026-08-21)
Feb. 4, 2022 GLW S 13,320 $42.01 $559,573 4,655 Direct -74.10% Disposed 265.5% (price as of 2026-08-21)

Showing latest 100 of 117 transactions

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
April 15, 2026 GLW Restricted Stock Unit Common Stock (18,884) — — 18,884 Disposed
April 15, 2026 GLW Performance Share Unit Common Stock (42,687) — — 42,687 Disposed
April 1, 2026 GLW Restricted Stock Unit Common Stock (9,692) — — 9,692 Acquired
Feb. 9, 2026 GLW Restricted Stock Unit Common Stock (2,476) — — 2,476 Disposed
Feb. 4, 2026 GLW Performance Share Unit Common Stock (20,932) — — 20,932 Acquired
Feb. 4, 2026 GLW Performance Share Unit Common Stock (15,591) — — 15,591 Acquired
Feb. 4, 2026 GLW Performance Share Unit Common Stock (16,891) — — 16,891 Acquired
Aug. 8, 2025 GLW Restricted Stock Unit Common Stock (2,476) — — 2,476 Disposed
April 15, 2025 GLW Restricted Stock Unit Common Stock (14,439) — — 14,439 Disposed
April 15, 2025 GLW Performance Share Unit Common Stock (21,539) — — 21,539 Disposed
April 1, 2025 GLW Restricted Stock Unit Common Stock (24,374) — — 24,374 Acquired
Feb. 18, 2025 GLW Stock Options (Right to Buy) Common Stock (12,529) $33.92 April 1, 2029 12,529 Disposed
Feb. 10, 2025 GLW Restricted Stock Unit Common Stock (2,475) — — 2,475 Disposed
Feb. 4, 2025 GLW Performance Share Unit Common Stock (14,717) — — 14,717 Acquired
Feb. 4, 2025 GLW Performance Share Unit Common Stock (16,996) — — 16,996 Acquired
Feb. 4, 2025 GLW Performance Share Unit Common Stock (20,248) — — 20,248 Acquired
Nov. 13, 2024 GLW Stock Options (Right to Buy) Common Stock (5,175) $19.65 May 15, 2030 5,175 Disposed
Aug. 8, 2024 GLW Restricted Stock Unit Common Stock (721) — — 721 Disposed
Aug. 8, 2024 GLW Restricted Stock Unit Common Stock (2,475) — — 2,475 Disposed
April 15, 2024 GLW Performance Share Unit Common Stock (13,652) — — 13,652 Disposed
April 15, 2024 GLW Restricted Stock Unit Common Stock (9,548) — — 9,548 Disposed
April 1, 2024 GLW Restricted Stock Unit Common Stock (22,498) — — 22,498 Acquired
Feb. 8, 2024 GLW Restricted Stock Unit Common Stock (1,440) — — 1,440 Disposed
Feb. 8, 2024 GLW Restricted Stock Unit Common Stock (4,951) — — 4,951 Disposed
Feb. 7, 2024 GLW Performance Share Unit Common Stock (4,029) — — 4,029 Acquired
Feb. 7, 2024 GLW Performance Share Unit Common Stock (3,638) — — 3,638 Acquired
Feb. 7, 2024 GLW Performance Share Unit Common Stock (4,759) — — 4,759 Acquired
May 15, 2023 GLW Restricted Stock Unit Common Stock (690) — — 690 Disposed
May 15, 2023 GLW Restricted Stock Unit Common Stock (4,784) — — 4,784 Disposed
April 14, 2023 GLW Restricted Stock Unit Common Stock (17,268) — — 17,268 Disposed
April 14, 2023 GLW Performance Share Unit Common Stock (38,466) — — 38,466 Disposed
April 3, 2023 GLW Restricted Stock Unit Common Stock (18,884) — — 18,884 Acquired
Feb. 8, 2023 GLW Performance Share Unit Common Stock (10,802) — — 10,802 Acquired
Feb. 8, 2023 GLW Performance Share Unit Common Stock (2,105) — — 2,105 Acquired
Feb. 8, 2023 GLW Performance Share Unit Common Stock (3,184) — — 3,184 Acquired
Feb. 8, 2023 GLW Restricted Stock Unit Common Stock (14,853) — — 14,853 Acquired
Feb. 8, 2023 GLW Restricted Stock Unit Common Stock (2,161) — — 2,161 Acquired
May 16, 2022 GLW Restricted Stock Unit Common Stock (690) — — 690 Disposed
May 16, 2022 GLW Restricted Stock Unit Common Stock (4,784) — — 4,784 Disposed
April 18, 2022 GLW Restricted Stock Unit Common Stock (6,265) — — 6,265 Disposed
April 1, 2022 GLW Restricted Stock Unit Common Stock (14,439) — — 14,439 Acquired
Feb. 4, 2022 GLW Stock Options (Right to Buy) Common Stock (13,320) $27.03 April 2, 2028 13,320 Disposed
Feb. 2, 2022 GLW Performance Share Unit Common Stock (7,518) — — 7,518 Acquired
Feb. 2, 2022 GLW Performance Share Unit Common Stock (13,599) — — 13,599 Acquired
May 17, 2021 GLW Restricted Stock Unit Common Stock (690) — — 690 Disposed
May 17, 2021 GLW Restricted Stock Unit Common Stock (4,784) — — 4,784 Disposed
May 3, 2021 GLW Stock Options (Right to Buy) Common Stock (5,175) $19.65 May 15, 2030 5,175 Disposed
May 3, 2021 GLW Stock Options (Right to Buy) Common Stock (11,668) $27.00 March 31, 2027 11,668 Disposed
April 15, 2021 GLW Restricted Stock Unit Common Stock (7,399) — — 7,399 Disposed
April 1, 2021 GLW Restricted Stock Unit Common Stock (9,548) — — 9,548 Acquired
March 1, 2021 GLW Stock Options (Right to Buy) Common Stock (4,189) $20.89 May 31, 2026 4,189 Disposed
March 1, 2021 GLW Stock Options (Right to Buy) Common Stock (4,189) $20.89 March 31, 2026 4,189 Disposed
March 1, 2021 GLW Stock Options (Right to Buy) Common Stock (3,031) $22.68 March 31, 2025 3,031 Disposed
Feb. 3, 2021 GLW Performance Share Unit Common Stock (14,065) — — 14,065 Acquired

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

Initial ownership (Form 3) 12 holdings

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

Date Ticker Security Shares Ownership
Oct. 9, 2020 GLW Restricted Stock Unit→ Common Stock (7,399) 7,399 Direct
Oct. 9, 2020 GLW Restricted Stock Unit→ Common Stock (6,265) 6,265 Direct
Oct. 9, 2020 GLW Restricted Stock Unit→ Common Stock (17,268) 17,268 Direct
Oct. 9, 2020 GLW Restricted Stock Unit→ Common Stock (14,352) 14,352 Direct
Oct. 9, 2020 GLW Restricted Stock Unit→ Common Stock (2,070) 2,070 Direct
Oct. 9, 2020 GLW Stock Options (Right to Buy)→ Common Stock (3,031) 3,031 Direct
Oct. 9, 2020 GLW Stock Options (Right to Buy)→ Common Stock (4,189) 4,189 Direct
Oct. 9, 2020 GLW Stock Options (Right to Buy)→ Common Stock (4,189) 4,189 Direct
Oct. 9, 2020 GLW Stock Options (Right to Buy)→ Common Stock (11,668) 11,668 Direct
Oct. 9, 2020 GLW Stock Options (Right to Buy)→ Common Stock (13,320) 13,320 Direct
Oct. 9, 2020 GLW Stock Options (Right to Buy)→ Common Stock (12,529) 12,529 Direct
Oct. 9, 2020 GLW Stock Options (Right to Buy)→ Common Stock (10,350) 10,350 Direct