person · Reporting owner

Chang Robby Sai Kit

Disclosed activity across 3 companies

Tapewire entity: 19926
SEC CIK: 0001732700

Reported relationships

Latest disclosed role at each company.

Company	Last reported as	Report date	Published
American Bitcoin Corp.GRYP · Entity 5010	Director	October 31, 2024	November 05, 2024
Riot Platforms, Inc.RIOT · Entity 3724	Chief Financial Officer	September 20, 2018	September 25, 2018
UR-ENERGY INCURG · Entity 5417	Director	August 24, 2026	August 25, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

American Bitcoin Corp.

Report date October 31, 2024 · Filed November 05, 2024

Security / award	Ownership account	Disclosed shares / units	Disclosure context
Common StockSEC Table I · non-derivative	Direct	264,080	Reported balance After 2024-10-31 transaction · row 1 Account or security details depend on footnotes; rows are not merged. 1 source row Row 1 · 2024-10-31 · Grant · Acquired 264,080 · Balance 264,080 F1: Represents shares of Common Stock of the issuer issuable upon settlement of Restricted Stock Units, subject to vesting conditions.
Common StockSEC Table I · non-derivative	IndirectSee footnote	3,309,648	Reported balance Holding disclosure · report date 2024-10-31 · row 2 Holding and transaction disclosures are not merged. 1 source row Row 2 · Balance 3,309,648 F2: Represents shares held by Chang Advisory Inc. Mr. Chang is the Chief Executive Officer of Chang Advisory Inc. and has voting and investment control over the shares held by it. Mr. Chang disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein.

Filing footnotes · ownership attribution and instrument terms

F1: Represents shares of Common Stock of the issuer issuable upon settlement of Restricted Stock Units, subject to vesting conditions.

F2: Represents shares held by Chang Advisory Inc. Mr. Chang is the Chief Executive Officer of Chang Advisory Inc. and has voting and investment control over the shares held by it. Mr. Chang disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein.

Riot Platforms, Inc.

Report date September 20, 2018 · Filed September 25, 2018

Security / award	Ownership account	Disclosed shares / units	Disclosure context
Common StockSEC Table I · non-derivative	Direct	72,000	Reported balance After 2018-09-20 transaction · row 1 Account or security details depend on footnotes; rows are not merged. 1 source row Row 1 · 2018-09-20 · Exercise / conversion · Acquired 12,000 · Balance 72,000 F1: Represents the 12,000 vested Restricted Stock Units ("RSUs") reported in Column 5 of Table I on page one above, convertible into shares of the Issuer's Common Stock on a one-for-one basis pursuant to the Riot Blockchain, Inc. (f/k/a Bioptix, Inc.) Amended & Restated Equity Incentive Plan (the "Plan"). F2: Represents a restricted stock award granted to the Reporting Person by the Issuer under the Plan at no cost as employment incentive on September 20, 2018, which award vested on the date of grant, subject to the restrictions of the Plan. F3: Includes an award of 60,000 RSUs granted on February 27, 2018 in connection with the Reporting Person's appointment as Chief Financial Officer, which shall vest in 24 equal monthly installments over a two year period, beginning on the one month anniversary of the date of issuance.
Restricted Stock UnitSEC Table II · derivative / convertible security	Direct	12,000	Reported balance After 2018-09-20 transaction · row 2 Instrument identity requires review; Table II rows are not merged. 1 source row Row 2 · 2018-09-20 · Exercise / conversion · Acquired 12,000 · Balance 12,000 F2: Represents a restricted stock award granted to the Reporting Person by the Issuer under the Plan at no cost as employment incentive on September 20, 2018, which award vested on the date of grant, subject to the restrictions of the Plan. F4: Not applicable. F5: Represents only the 12,000 RSUs granted on September 20, 2018 and does not include RSUs previously reported.

Filing footnotes · ownership attribution and instrument terms

F1: Represents the 12,000 vested Restricted Stock Units ("RSUs") reported in Column 5 of Table I on page one above, convertible into shares of the Issuer's Common Stock on a one-for-one basis pursuant to the Riot Blockchain, Inc. (f/k/a Bioptix, Inc.) Amended & Restated Equity Incentive Plan (the "Plan").

F2: Represents a restricted stock award granted to the Reporting Person by the Issuer under the Plan at no cost as employment incentive on September 20, 2018, which award vested on the date of grant, subject to the restrictions of the Plan.

F3: Includes an award of 60,000 RSUs granted on February 27, 2018 in connection with the Reporting Person's appointment as Chief Financial Officer, which shall vest in 24 equal monthly installments over a two year period, beginning on the one month anniversary of the date of issuance.

F4: Not applicable.

F5: Represents only the 12,000 RSUs granted on September 20, 2018 and does not include RSUs previously reported.

UR-ENERGY INC

Report date August 24, 2026 · Filed August 25, 2026

Security / award	Ownership account	Disclosed shares / units	Disclosure context
Common SharesSEC Table I · non-derivative	Direct	96,449	Ending reported balance After 2026-08-24 transaction · row 2 2 source rows · reconciled sequence Row 1 · 2026-08-24 · Exercise / conversion · Acquired 87,858 · Balance 172,037 F1: The options were exercised and the shares were acquired at $1.44 Canadian dollars, $1.0403 U.S. dollars is the equivalent price pursuant to the exchange rate realized as of the transaction date (Cdn$1.00 = US$0.7224). Row 2 · 2026-08-24 · Sale · Disposed 75,588 · Balance 96,449 F2: The shares were sold at $1.9504 Canadian dollars, $1.4090 U.S. dollars is the equivalent of the sales price pursuant to the exchange rate realized as of the transaction date (Cdn$1.00 = US$0.7224).
Common share options (right to buy)SEC Table II · derivative / convertible security · Conversion / exercise price $1.04 · Expires 2026-08-27	Direct	340,134	Reported balance After 2026-08-24 transaction · row 3 Instrument identity requires review; Table II rows are not merged. 1 source row Row 3 · 2026-08-24 · Exercise / conversion · Disposed 87,858 · Balance 340,134 F1: The options were exercised and the shares were acquired at $1.44 Canadian dollars, $1.0403 U.S. dollars is the equivalent price pursuant to the exchange rate realized as of the transaction date (Cdn$1.00 = US$0.7224). F3: The 87,858 options were granted on 8/27/2021 and vested and became exercisable as follows: 29,286 on 8/27/2022; 29,286 on 8/27/2023; and 29,286 on 8/27/2024.

Filing footnotes · ownership attribution and instrument terms

F1: The options were exercised and the shares were acquired at $1.44 Canadian dollars, $1.0403 U.S. dollars is the equivalent price pursuant to the exchange rate realized as of the transaction date (Cdn$1.00 = US$0.7224).

F2: The shares were sold at $1.9504 Canadian dollars, $1.4090 U.S. dollars is the equivalent of the sales price pursuant to the exchange rate realized as of the transaction date (Cdn$1.00 = US$0.7224).

F3: The 87,858 options were granted on 8/27/2021 and vested and became exercisable as follows: 29,286 on 8/27/2022; 29,286 on 8/27/2023; and 29,286 on 8/27/2024.

Transaction history

JSON API

Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction date	Company	Activity / security	Shares / units	Reported price	Reported value	Details
December 14, 2020 Filed Dec 16, 2020 22:15 UTC	UR-ENERGY INC URG · Entity 5417	Exercise / conversionCommon Shares	5,870	$0.63	$3,681.08	Disclosure SEC source: 0001654954-20-013639 · section16.xml · nonDerivative · entry 1 Chang Robby Sai Kit · CIK 0001732700 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 16,027 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · shares: On December 14, 2018, the reporting person was granted 12,632 Restricted Share Units ("RSUs"). On redemption, 6,762 RSUs were withheld by the Company solely for the purpose of satisfying tax withholding obligations and the reporting person received 5,870 common shares. F2 · price: The common shares were priced at $0.80 Canadian dollars and $0.6271 U.S. dollars is the equivalent of the purchase price pursuant to the exchange rate as of the transaction date (Cdn$ 1.00 = US$0.7839) as reported by Bank of Canada on its website, www.bankofcanada.ca. Read SEC document
November 13, 2020 Filed Nov 17, 2020 21:37 UTC	UR-ENERGY INC URG · Entity 5417	GrantRestricted share units (exchange for common stock) · Derivative	53,479	$0.00	$0.00	Disclosure SEC source: 0001654954-20-012619 · section16.xml · derivative · entry 2 Chang Robby Sai Kit · CIK 0001732700 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 114,505 Underlying: Common shares · 53,479 shares Expires not disclosed F3 · derivative.exercise_price: Each unit is redeemable upon vesting for one common share. F4 · derivative.exercise_date: Units vest and become redeemable on November 13, 2022. F4 · derivative.expiration_date: Units vest and become redeemable on November 13, 2022. Read SEC document
November 13, 2020 Filed Nov 17, 2020 21:37 UTC	UR-ENERGY INC URG · Entity 5417	GrantCommon share options (right to buy) · Derivative	213,914	$0.00 Strike: $0.48	$0.00	Disclosure SEC source: 0001654954-20-012619 · section16.xml · derivative · entry 1 Chang Robby Sai Kit · CIK 0001732700 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 716,668 Underlying: Common shares · 213,914 shares Expires 2025-11-13 F1 · derivative.exercise_price: The options were priced at $0.63 Canadian dollars. This is the $0.4792 U.S. dollar equivalent of the purchase price pursuant to the exchange rate as of the transaction date (Cdn$ 1.00 = US$0.7606) as reported by Bank of Canada on its website, www.bankofcanada.ca. F2 · derivative.exercise_date: Options vest from this grant and become exercisable as follows: 71,305 on November 13, 2021; 71,305 on November 13, 2022 and 71,304 on November 13, 2023. Read SEC document
August 21, 2020 Filed Aug 25, 2020 00:13 UTC	UR-ENERGY INC URG · Entity 5417	Exercise / conversionRestricted Share Units (exchange for common stock) · Derivative	13,914	$0.00	$0.00	Disclosure SEC source: 0001104659-20-098076 · tm2029300d3_form4.xml · derivative · entry 2 Chang Robby Sai Kit · CIK 0001732700 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 61,026 Underlying: Common shares · 13,914 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: Each unit is redeemable upon vesting for one common share F2 · derivative.exercise_date: On August 20, 2018, the reporting person was granted 13,914 Restricted Share Units ("RSUs") vesting in two years. Subsequently, the Compensation Committee made the determinations to satisfy the RSU award by delivering common shares rather than cash. Under the terms of the Ur-Energy Inc. Restricted Share Unit Plan, each Restricted Share Unit awarded under the Plan is redeemed on or within thirty (30) days after the applicable redemption date for cash or common shares, as determined by the Compensation Committee of the Board. F2 · derivative.expiration_date: On August 20, 2018, the reporting person was granted 13,914 Restricted Share Units ("RSUs") vesting in two years. Subsequently, the Compensation Committee made the determinations to satisfy the RSU award by delivering common shares rather than cash. Under the terms of the Ur-Energy Inc. Restricted Share Unit Plan, each Restricted Share Unit awarded under the Plan is redeemed on or within thirty (30) days after the applicable redemption date for cash or common shares, as determined by the Compensation Committee of the Board. Read SEC document
August 21, 2020 Filed Aug 25, 2020 00:13 UTC	UR-ENERGY INC URG · Entity 5417	Exercise / conversionCommon Shares	10,157	$0.55	$5,614.79	Disclosure SEC source: 0001104659-20-098076 · tm2029300d3_form4.xml · nonDerivative · entry 1 Chang Robby Sai Kit · CIK 0001732700 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 10,157 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · shares: On August 20, 2018, the reporting person was granted 13,914 Restricted Share Units ("RSUs") vesting in two years. Subsequently, the Compensation Committee made the determinations to satisfy the RSU award by delivering common shares rather than cash. Under the terms of the Ur-Energy Inc. Restricted Share Unit Plan, each Restricted Share Unit awarded under the Plan is redeemed on or within thirty (30) days after the applicable redemption date for cash or common shares, as determined by the Compensation Committee of the Board. F4 · shares: The 3,757 shares withheld from issuance by the Company were solely for the purpose of satisfying the tax withholding obligation arising in connection with the vesting of the RSUs granted on August 20, 2018 under the terms of the Ur-Energy Inc. Restricted Share Unit Plan. F3 · price: The common shares were priced at $0.73 Canadian dollars per share. $0.5528 is the U.S. dollar equivalent of the share price pursuant to the exchange rate as of the transaction date (CDN$ 1.00 = US$ 0.7573), as reported by the Bank of Canada on its website, www.bankofcanada.ca. Read SEC document
November 05, 2019 Filed Nov 7, 2019 21:50 UTC	UR-ENERGY INC URG · Entity 5417	GrantRestricted share units (exchange for common stock) · Derivative	48,394	$0.00	$0.00	Disclosure SEC source: 0001104659-19-061172 · tm1922220-3_4.xml · derivative · entry 2 Chang Robby Sai Kit · CIK 0001732700 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 74,940 Underlying: Common shares · 48,394 shares Expires not disclosed F3 · derivative.exercise_price: Each unit is redeemable upon vesting for one common share. F4 · derivative.exercise_date: Units vest and become redeemable on November 5, 2021. F4 · derivative.expiration_date: Units vest and become redeemable on November 5, 2021. Read SEC document
November 05, 2019 Filed Nov 7, 2019 21:50 UTC	UR-ENERGY INC URG · Entity 5417	GrantCommon share options (right to buy) · Derivative	193,574	$0.00 Strike: $0.60	$0.00	Disclosure SEC source: 0001104659-19-061172 · tm1922220-3_4.xml · derivative · entry 1 Chang Robby Sai Kit · CIK 0001732700 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 499,754 Underlying: Common shares · 193,574 shares Expires 2024-11-05 F1 · derivative.exercise_price: The options were priced at $0.79 Canadian dollars. This is the U.S. dollar equivalent of the purchase price pursuant to the exchange rate as of the transaction date (Cdn$ 1.00 = US$0.7603) as reported by Bank of Canada on its website, www.bankofcanada.ca. F2 · derivative.exercise_date: Options vest from this grant and become exercisable as follows: 64,524 on November 5, 2020; 64,524 on November 5, 2021 and 64,526 on November 5, 2022. Read SEC document
December 14, 2018 Filed Dec 19, 2018 00:09 UTC	UR-ENERGY INC URG · Entity 5417	GrantRestricted share units (exchange for common stock) · Derivative	12,632	$0.00	$0.00	Disclosure SEC source: 0001144204-18-065233 · tv509451_4.xml · derivative · entry 2 Chang Robby Sai Kit · CIK 0001732700 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 26,546 Underlying: Common shares · 12,632 shares Expires not disclosed F3 · derivative.exercise_price: Each unit is redeemable upon vesting for one common share F4 · derivative.exercise_date: Units vest and become redeemable on December 14, 2020. F4 · derivative.expiration_date: Units vest and become redeemable on December 14, 2020. Read SEC document
December 14, 2018 Filed Dec 19, 2018 00:09 UTC	UR-ENERGY INC URG · Entity 5417	GrantCommon share options (right to buy) · Derivative	50,527	$0.00 Strike: $0.68	$0.00	Disclosure SEC source: 0001144204-18-065233 · tv509451_4.xml · derivative · entry 1 Chang Robby Sai Kit · CIK 0001732700 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 306,180 Underlying: Common shares · 50,527 shares Expires 2023-12-14 F1 · derivative.exercise_price: The options were priced at $0.91 Canadian dollars. This is the U.S. dollar equivalent of the purchase price pursuant to the exchange rate as of the transaction date (Cdn$ 1.00 = US$0.7474) as reported by Bank of Canada on its website, www.bankofcanada.ca. F2 · derivative.exercise_date: Options vest from this grant and become exercisable as follows: 16,674 on December 14, 2019; 16,674 on December 14, 2020 and 17,179 on December 14, 2021. Read SEC document
September 20, 2018 Filed Sep 25, 2018 00:40 UTC	Riot Platforms, Inc. RIOT · Entity 3724	Exercise / conversionRestricted Stock Unit · Derivative	12,000	$0.00	$0.00	Disclosure SEC source: 0001567619-18-003075 · doc1.xml · derivative · entry 2 Chang Robby Sai Kit · CIK 0001732700 · Chief Financial Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 12,000 Underlying: Common Stock · 12,000 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · derivative.exercise_price: Represents a restricted stock award granted to the Reporting Person by the Issuer under the Plan at no cost as employment incentive on September 20, 2018, which award vested on the date of grant, subject to the restrictions of the Plan. F2 · derivative.exercise_date: Represents a restricted stock award granted to the Reporting Person by the Issuer under the Plan at no cost as employment incentive on September 20, 2018, which award vested on the date of grant, subject to the restrictions of the Plan. F4 · derivative.expiration_date: Not applicable. F5 · balance_after: Represents only the 12,000 RSUs granted on September 20, 2018 and does not include RSUs previously reported. Read SEC document
September 20, 2018 Filed Sep 25, 2018 00:40 UTC	Riot Platforms, Inc. RIOT · Entity 3724	Exercise / conversionCommon Stock	12,000	$0.00	$0.00	Disclosure SEC source: 0001567619-18-003075 · doc1.xml · nonDerivative · entry 1 Chang Robby Sai Kit · CIK 0001732700 · Chief Financial Officer 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 72,000 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · kind: Represents the 12,000 vested Restricted Stock Units ("RSUs") reported in Column 5 of Table I on page one above, convertible into shares of the Issuer's Common Stock on a one-for-one basis pursuant to the Riot Blockchain, Inc. (f/k/a Bioptix, Inc.) Amended & Restated Equity Incentive Plan (the "Plan"). F2 · shares: Represents a restricted stock award granted to the Reporting Person by the Issuer under the Plan at no cost as employment incentive on September 20, 2018, which award vested on the date of grant, subject to the restrictions of the Plan. F2 · price: Represents a restricted stock award granted to the Reporting Person by the Issuer under the Plan at no cost as employment incentive on September 20, 2018, which award vested on the date of grant, subject to the restrictions of the Plan. F3 · balance_after: Includes an award of 60,000 RSUs granted on February 27, 2018 in connection with the Reporting Person's appointment as Chief Financial Officer, which shall vest in 24 equal monthly installments over a two year period, beginning on the one month anniversary of the date of issuance. Read SEC document
August 20, 2018 Filed Aug 22, 2018 00:17 UTC	UR-ENERGY INC URG · Entity 5417	GrantRestricted share units (exchange for common stock) · Derivative	13,914	$0.00	$0.00	Disclosure SEC source: 0001144204-18-045834 · tv501484_4.xml · derivative · entry 2 Chang Robby Sai Kit · CIK 0001732700 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 13,914 Underlying: Common shares · 13,914 shares Expires not disclosed F3 · derivative.exercise_price: Each unit is redeemable upon vesting for one common share F4 · derivative.exercise_date: Units vest and become redeemable on August 20, 2020. F4 · derivative.expiration_date: Units vest and become redeemable on August 20, 2020. Read SEC document
August 20, 2018 Filed Aug 22, 2018 00:17 UTC	UR-ENERGY INC URG · Entity 5417	GrantCommon share options (right to buy) · Derivative	55,653	$0.00 Strike: $0.71	$0.00	Disclosure SEC source: 0001144204-18-045834 · tv501484_4.xml · derivative · entry 1 Chang Robby Sai Kit · CIK 0001732700 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 255,653 Underlying: Common shares · 55,653 shares Expires 2023-08-20 F1 · derivative.exercise_price: The options were priced at $0.93 Canadian dollars. This is the U.S. dollar equivalent of the purchase price pursuant to the exchange rate as of the transaction date (Cdn$ 1.00 = US$0.7654) as reported by Bank of Canada on its website, www.bankofcanada.ca. F2 · derivative.exercise_date: Options vest from this grant and become exercisable as follows: 18,551 on August 20, 2019; 18,551 on August 20, 2020 and 18,551 on August 20, 2021. Read SEC document
March 30, 2018 Filed Apr 3, 2018 23:39 UTC	UR-ENERGY INC URG · Entity 5417	GrantCommon share options (right to buy) · Derivative	200,000	$0.00 Strike: $0.60	$0.00	Disclosure SEC source: 0001144204-18-019059 · tv490364_4.xml · derivative · entry 1 Chang Robby Sai Kit · CIK 0001732700 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 200,000 Underlying: Common shares · 200,000 shares Expires 2023-03-30 F1 · derivative.exercise_price: The options were priced at $0.77 Canadian dollars. This is the U.S. dollar equivalent of the purchase price pursuant to the exchange rate as of the transaction date (Cdn$ 1.00 = US$0.7756) as reported by Bank of Canada on its website, www.bankofcanada.ca. F2 · derivative.exercise_date: Options vest from this grant and become exercisable as follows: 66,666 on March 30, 2019; 66,666 on March 30, 2020 and 66,668 on March 30, 2021. Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.