Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| NIOCORP DEVELOPMENTS LTDNB · Entity 5368 | Director | August 18, 2025 | August 20, 2025 |
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.
NIOCORP DEVELOPMENTS LTD
Report date August 18, 2025 · Filed August 20, 2025
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Director Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $4.35 · Expires 2030-08-19 | Direct | 55,000 |
Reported balance
After 2025-08-18 transaction · row 1
Instrument identity requires review; Table II rows are not merged.
1 source rowRow 1 · 2025-08-18 · Grant · Acquired 55,000 · Balance 55,000 F1: 34% of the options vested on the grant date and the remainder will vest in equal installments on each anniversary of the grant date until August 18, 2027. |
Filing footnotes · ownership attribution and instrument terms
F1: 34% of the options vested on the grant date and the remainder will vest in equal installments on each anniversary of the grant date until August 18, 2027.
Transaction history
JSON APIPurchases/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 |
|---|---|---|---|---|---|---|
| August 18, 2025 Filed Aug 20, 2025 16:43 UTC | NIOCORP DEVELOPMENTS LTD NB · Entity 5368 | GrantDirector Stock Option (Right to Buy) · Derivative | 55,000 | $0.00 Strike: $4.35 | $0.00 |
DisclosureSEC source: 0001539497-25-002199 · ownership.xml · derivative · entry 1 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 55,000 Underlying: Common Shares · 55,000 shares Expires 2030-08-19 F1 · derivative.exercise_date: 34% of the options vested on the grant date and the remainder will vest in equal installments on each anniversary of the grant date until August 18, 2027. Read SEC document |
| December 23, 2024 Filed Dec 23, 2024 16:32 UTC | NIOCORP DEVELOPMENTS LTD NB · Entity 5368 | GrantDirector Stock Option (Right to Buy) · Derivative | 75,000 | $0.00 Strike: $1.40 | $0.00 |
DisclosureSEC source: 0001539497-24-002712 · ownership.xml · derivative · entry 1 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 75,000 Underlying: Common Shares · 75,000 shares Expires 2029-12-21 Read SEC document |
| February 15, 2024 Filed Feb 15, 2024 17:00 UTC | NIOCORP DEVELOPMENTS LTD NB · Entity 5368 | GrantDirector Stock Option (Right to Buy) · Derivative | 75,000 | $0.00 Strike: $2.99 | $0.00 |
DisclosureSEC source: 0001539497-24-000512 · ownership.xml · derivative · entry 1 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 75,000 Underlying: Common Shares · 75,000 shares Expires 2029-02-15 Read SEC document |
| March 25, 2023 Filed Mar 28, 2023 17:21 UTC | NIOCORP DEVELOPMENTS LTD NB · Entity 5368 | GrantDirector Stock Option (Right to Buy) · Derivative | 45,000 | $0.00 Strike: $6.95 | $0.00 |
DisclosureSEC source: 0001539497-23-000547 · ownership.xml · derivative · entry 1 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 45,000 Underlying: Common Shares · 45,000 shares Expires 2026-03-27 Read SEC document |
| November 28, 2022 Filed Nov 29, 2022 17:24 UTC | NIOCORP DEVELOPMENTS LTD NIOBF · Entity 5368 | Exercise / conversionDirector Stock Option (right to buy) · Derivative | 300,000 | $0.00 Strike: $0.40 | $0.00 |
DisclosureSEC source: 0001539497-22-001875 · ownership.xml · derivative · entry 6 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Shares · 300,000 shares Expires 2023-11-15 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. F3 · derivative.exercise_price: Option exercise price reflected was converted from Canadian exercise price of C$0.54 using an exchange rate of C$1.3377 = US$1.00 as reported by the Bank of Canada on November 25, 2022. F5 · derivative.exercise_date: The option, representing a right to purchase a total of 300,000 Common Shares, became exercisable in installments as follows: 50% on May 15, 2019; 25% on November 15, 2019; and 25% on May 15, 2020. Read SEC document |
| November 28, 2022 Filed Nov 29, 2022 17:24 UTC | NIOCORP DEVELOPMENTS LTD NIOBF · Entity 5368 | Exercise / conversionDirector Stock Option (right to buy) · Derivative | 500,000 | $0.00 Strike: $0.35 | $0.00 |
DisclosureSEC source: 0001539497-22-001875 · ownership.xml · derivative · entry 5 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 0 Underlying: Common Shares · 500,000 shares Expires 2022-11-30 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: Option exercise price reflected was converted from Canadian exercise price of C$0.47 using an exchange rate of C$1.3377 = US$1.00 as reported by the Bank of Canada on November 25, 2022. F4 · derivative.exercise_date: The option, representing a right to purchase a total of 500,000 Common Shares, became exercisable on the issuance date of November 9, 2017. Read SEC document |
| November 28, 2022 Filed Nov 29, 2022 17:24 UTC | NIOCORP DEVELOPMENTS LTD NIOBF · Entity 5368 | Tax withholdingCommon Shares | 138,462 | $0.87 | $121,098.87 |
DisclosureSEC source: 0001539497-22-001875 · ownership.xml · nonDerivative · entry 4 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 460,682 F2 · price: Sale price of common shares withheld in satisfaction of option exercise price is based on the closing price of the common shares on the Toronto Stock Exchange on November 25, 2022 of C$1.17, which was converted using an exchange rate of C$1.3377 = US$1.00 as reported by the Bank of Canada on November 25, 2022. Read SEC document |
| November 28, 2022 Filed Nov 29, 2022 17:24 UTC | NIOCORP DEVELOPMENTS LTD NIOBF · Entity 5368 | Exercise / conversionCommon Shares | 300,000 | $0.40 | $121,110.00 |
DisclosureSEC source: 0001539497-22-001875 · ownership.xml · nonDerivative · entry 3 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 599,145 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. F3 · price: Option exercise price reflected was converted from Canadian exercise price of C$0.54 using an exchange rate of C$1.3377 = US$1.00 as reported by the Bank of Canada on November 25, 2022. Read SEC document |
| November 28, 2022 Filed Nov 29, 2022 17:24 UTC | NIOCORP DEVELOPMENTS LTD NIOBF · Entity 5368 | Tax withholdingCommon Shares | 200,855 | $0.87 | $175,667.78 |
DisclosureSEC source: 0001539497-22-001875 · ownership.xml · nonDerivative · entry 2 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 299,145 F2 · price: Sale price of common shares withheld in satisfaction of option exercise price is based on the closing price of the common shares on the Toronto Stock Exchange on November 25, 2022 of C$1.17, which was converted using an exchange rate of C$1.3377 = US$1.00 as reported by the Bank of Canada on November 25, 2022. Read SEC document |
| November 28, 2022 Filed Nov 29, 2022 17:24 UTC | NIOCORP DEVELOPMENTS LTD NIOBF · Entity 5368 | Exercise / conversionCommon Shares | 500,000 | $0.35 | $175,650.00 |
DisclosureSEC source: 0001539497-22-001875 · ownership.xml · nonDerivative · entry 1 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 500,000 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 · price: Option exercise price reflected was converted from Canadian exercise price of C$0.47 using an exchange rate of C$1.3377 = US$1.00 as reported by the Bank of Canada on November 25, 2022. Read SEC document |
| December 17, 2021 Filed Dec 17, 2021 16:17 UTC | NIOCORP DEVELOPMENTS LTD NIOBF · Entity 5368 | GrantDirector Stock Option (Right to Buy) · Derivative | 300,000 | $0.00 Strike: $1.06 | $0.00 |
DisclosureSEC source: 0001539497-21-002110 · ownership.xml · derivative · entry 1 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 300,000 Underlying: Common Shares · 300,000 shares Expires 2024-12-17 F1 · derivative.exercise_price: Option exercise price reflected was converted from Canadian exercise price of C$1.36 using an exchange rate of C$1.2782=US$1.00 as reported by the Bank of Canada on December 16, 2021. Read SEC document |
| September 18, 2020 Filed Sep 21, 2020 17:40 UTC | NIOCORP DEVELOPMENTS LTD NIOBF · Entity 5368 | GrantDirector Stock Option (Right to Buy) · Derivative | 30,000 | $0.00 Strike: $0.64 | $0.00 |
DisclosureSEC source: 0001785982-20-000880 · sf0028h_form4.xml · derivative · entry 2 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 300,000 Underlying: Common Shares · 300,000 shares Expires 2023-09-18 F1 · derivative.exercise_price: Option exercise price reflected was converted from Canadian exercise price of C$0.84 using an exchange rate of C$1.3200=US$1.00 as reported by the Bank of Canada on September 17, 2020. Read SEC document |
| September 18, 2020 Filed Sep 21, 2020 17:40 UTC | NIOCORP DEVELOPMENTS LTD NIOBF · Entity 5368 | Exercise / conversionCommon Shares | 30,000 | $0.47 | $14,091.00 |
DisclosureSEC source: 0001785982-20-000880 · sf0028h_form4.xml · nonDerivative · entry 1 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 130,000 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 · price: Option exercise price reflected was converted from Canadian exercise price of C$0.84 using an exchange rate of C$1.3200=US$1.00 as reported by the Bank of Canada on September 17, 2020. Read SEC document |
| September 18, 2020 Filed Sep 21, 2020 21:15 UTC | NIOCORP DEVELOPMENTS LTD NIOBF · Entity 5368 | GrantDirector Stock Option (Right to Buy) · Derivative | 300,000 | $0.00 Strike: $0.64 | $0.00 |
DisclosureSEC source: 0001785982-20-000890 · sf0028h_form4.xml · derivative · entry 1 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 300,000 Underlying: Common Shares · 300,000 shares Expires 2023-09-18 F1 · derivative.exercise_price: Option exercise price reflected was converted from Canadian exercise price of C$0.84 using an exchange rate of C$1.3200=US$1.00 as reported by the Bank of Canada on September 17, 2020. Read SEC document |
| September 18, 2020 Filed Oct 20, 2020 17:01 UTC Amendment | NIOCORP DEVELOPMENTS LTD NIOBF · Entity 5368 | GrantDirector Stock Option (Right to Buy) · Derivative | 300,000 | $0.00 Strike: $0.64 | $0.00 |
DisclosureSEC source: 0001785982-20-000928 · sf0039h_form4.xml · derivative · entry 1 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 300,000 Underlying: Common Shares · 300,000 shares Expires 2023-09-18 F1 · derivative.exercise_price: Option exercise price reflected was converted from Canadian exercise price of C$0.84 using an exchange rate of C$1.3200=US$1.00 as reported by the Bank of Canada on September 17, 2020. Read SEC document |
| November 15, 2018 Filed Dec 6, 2018 17:50 UTC | NIOCORP DEVELOPMENTS LTD NIOBF · Entity 5368 | GrantDirector Stock Option (Right to Buy) · Derivative | 300,000 | $0.00 Strike: $0.42 | $0.00 |
DisclosureSEC source: 0001615774-18-013968 · ownership.xml · derivative · entry 1 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 300,000 Underlying: Common Shares · 300,000 shares Expires 2023-11-15 F1 · derivative.exercise_price: Option exercise price reflected was converted from Canadian exercise price of C$0.54 using an exchange rate of C$1.2773=US$1.00 as reported by the Bank of Canada on November 15, 2018. F2 · derivative.exercise_date: The option vests as follows: 50% on 05/15/2019; 25% on 11/15/2019; 25% on 05/15/2020. Read SEC document |
| November 09, 2017 Filed Nov 13, 2017 17:01 UTC | NIOCORP DEVELOPMENTS LTD NIOBF · Entity 5368 | GrantDirector Stock Option (Right to Buy) · Derivative | 500,000 | $0.00 Strike: $0.37 | $0.00 |
DisclosureSEC source: 0001615774-17-006559 · s108118_form4.xml · derivative · entry 1 Guerrero-Mahon Nilsa · CIK 0001718789 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 500,000 Underlying: Common Shares · 500,000 shares Expires 2022-11-09 F1 · derivative.exercise_price: Option exercise price reflected was converted from Canadian exercise price of $0.47 using an exchange rate of C$1.2692=US$1.00. F2 · derivative.exercise_date: This option is fully vested 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.