Quick Takeaways
- NB - NIOCORP DEVELOPMENTS LTD has 15 insiders with reported activity on this page.
- No net insider buy/sell flow is currently reported for the last year.
- Recent transaction rows are available for direct filing-level review.
Insider Transactions Reported by 15 Insiders of NIOCORP DEVELOPMENTS LTD
- Symbol
- NB, NIOBW on Nasdaq
- Location
- Centennial, CO
What Changed
- No meaningful buy/sell imbalance is currently visible in the one-year window.
- Activity will update as new Forms 3/4/5 are filed.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Source Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsInsider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 08 May 2025.
Buys
$0
Shares: 0
Insiders: 0
Sells
$0
Shares: 0
Insiders: 0
Net
$0
Shares: 0
Insiders: 0
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
NIOCORP DEVELOPMENTS LTD executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Mark A. Smith | President & CEO, Director | $8,208,619 | Mixed | 15 Dec 2025 | ||
| Michael G. Maselli | Director | $2,505,907 | Mixed | 18 Aug 2025 | ||
| Dean C. Kehler | Director | $752,543 | Mixed | 15 Dec 2025 | ||
| Anthony W. Fulton | Director | $485,960 | Mixed | 18 Aug 2025 | ||
| Neal S. Shah | Chief Financial Officer | $265,613 | Mixed | 15 Dec 2025 | ||
| Anna Castner Wightman | Director | $125,213 | Mixed | 15 Nov 2023 | ||
| Michael James Morris | Director | Mixed | 23 Dec 2024 | |||
| David Coates Beling | Director | Mixed | 18 Aug 2025 | |||
| Michael G. Maselli | Director | Mixed | 17 Mar 2023 | |||
| Ernest M. Cleave | Senior VP Business Development | Mixed | 18 Aug 2025 | |||
| Nilsa Guerrero-Mahon | Director | Mixed | 18 Aug 2025 | |||
| James T. Sims | Chief Communications Officer | Mixed | 18 Aug 2025 | |||
| Fernanda Reda Fenga Viana Klamas | Director | Mixed | 25 Mar 2023 | |||
| Peter Robert Oliver | Director | Mixed | 18 Aug 2025 | |||
| Scott Honan | Chief Operating Officer | Mixed | 18 Aug 2025 |
Top shareholders of NIOCORP DEVELOPMENTS LTD (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
|
Company |
4.8%
from 13D/G
|
6,381,301
|
$33,820,895 | — | 31 Dec 2025 | |
| CITADEL ADVISORS LLC |
13D/G
13F
|
Kenneth Griffin · Company |
4.3%
|
6,216,351
|
$27,724,925 | +$25,460,182 | 25 Feb 2026 | |
| Brevan Howard Capital Management LP |
13F
|
Company |
1.8%
|
2,560,416
|
$13,570,205 | — | 31 Dec 2025 | |
| PRIVATE MANAGEMENT GROUP INC |
13F
|
Company |
1.5%
|
2,145,364
|
$11,370,429 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
1.2%
|
1,768,356
|
$9,372,287 | — | 31 Dec 2025 | |
| Alyeska Investment Group, L.P. |
13F
|
Company |
1.1%
|
1,600,000
|
$8,480,000 | — | 31 Dec 2025 | |
| Mark A. Smith |
3/4/5
|
President & CEO, Director |
—
mixed-class rows
|
2,693,819
mixed-class rows
|
$8,208,619 | — | 15 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
0.92%
|
1,306,157
|
$6,922,631 | — | 31 Dec 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.84%
|
1,191,723
|
$6,316,132 | — | 31 Dec 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
0.77%
|
1,097,741
|
$5,818,027 | — | 31 Dec 2025 | |
| Deltroit Asset Management (UK) LLP |
13F
|
Company |
0.75%
|
1,071,150
|
$5,677,095 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.73%
|
1,035,267
|
$5,486,915 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.64%
|
914,991
|
$4,849,452 | — | 31 Dec 2025 | |
| Nuveen, LLC |
13F
|
Company |
0.62%
|
879,032
|
$4,658,870 | — | 31 Dec 2025 | |
| JANE STREET GROUP, LLC |
13F
|
Company |
—
mixed-class rows
|
922,585
mixed-class rows
|
$4,198,102 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
—
mixed-class rows
|
766,646
mixed-class rows
|
$4,062,880 | — | 31 Dec 2025 | |
| Bridgewater Associates, LP |
13F
|
Company |
0.45%
|
645,889
|
$3,423,212 | — | 31 Dec 2025 | |
| HITE Hedge Asset Management LLC |
13F
|
Company |
0.45%
|
634,906
|
$3,365,002 | — | 31 Dec 2025 | |
| Counterpoint Mutual Funds LLC |
13F
|
Company |
0.43%
|
610,063
|
$3,233,334 | — | 31 Dec 2025 | |
| BOOTHBAY FUND MANAGEMENT, LLC |
13F
|
Company |
—
class O/S missing
|
510,000
|
$2,703,000 | — | 31 Dec 2025 | |
| Michael G. Maselli |
3/4/5
|
Director |
—
mixed-class rows
|
903,077
mixed-class rows
|
$2,505,907 | — | 18 Aug 2025 | |
| BALYASNY ASSET MANAGEMENT L.P. |
13F
|
Company |
0.31%
|
443,898
|
$2,352,659 | — | 31 Dec 2025 | |
| Soviero Asset Management, LP |
13F
|
Company |
0.27%
|
380,000
|
$2,014,000 | — | 31 Dec 2025 | |
| FOURSIXTHREE CAPITAL LP |
13F
|
Company |
0.25%
|
352,063
|
$1,865,934 | — | 31 Dec 2025 | |
| GILDER GAGNON HOWE & CO LLC |
13F
|
Company |
0.24%
|
345,405
|
$1,830,647 | — | 31 Dec 2025 | |
| ALPS ADVISORS INC |
13F
|
Company |
0.23%
|
326,053
|
$1,728,081 | — | 31 Dec 2025 | |
| KINGDON CAPITAL MANAGEMENT, L.L.C. |
13F
|
Company |
0.22%
|
314,465
|
$1,666,665 | — | 31 Dec 2025 | |
| Blue Owl Capital Holdings LP |
13F
|
Company |
—
class O/S missing
|
876,148
|
$1,664,681 | — | 31 Dec 2025 | |
| Point72 Asset Management, L.P. |
13F
|
Company |
0.19%
|
270,352
|
$1,432,866 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.19%
|
263,995
|
$1,399,174 | — | 31 Dec 2025 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP |
13F
|
Company |
0.17%
|
246,767
|
$1,307,865 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
0.17%
|
237,515
|
$1,258,830 | — | 31 Dec 2025 | |
| Swiss National Bank |
13F
|
Company |
0.16%
|
221,200
|
$1,172,360 | — | 31 Dec 2025 | |
| BARCLAYS PLC |
13F
|
Company |
0.15%
|
217,278
|
$1,151,574 | — | 31 Dec 2025 | |
| Caption Management, LLC |
13F
|
Company |
—
class O/S missing
|
617,756
|
$1,149,026 | — | 31 Dec 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.15%
|
216,625
|
$1,148,115 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.15%
|
213,086
|
$1,129,356 | — | 31 Dec 2025 | |
| Arosa Capital Management LP |
13F
|
Company |
0.14%
|
200,000
|
$1,060,000 | — | 31 Dec 2025 | |
| ARISTEIA CAPITAL, L.L.C. |
13F
|
Company |
—
class O/S missing
|
557,901
|
$1,051,643 | — | 31 Dec 2025 | |
| PFG Advisors |
13F
|
Company |
0.14%
|
196,675
|
$1,042,378 | — | 31 Dec 2025 | |
| Harfst & Associates, Inc. |
13F
|
Company |
0.13%
|
184,620
|
$978,486 | — | 31 Dec 2025 | |
| PEAK6 LLC |
13F
|
Company |
—
mixed-class rows
|
313,341
mixed-class rows
|
$965,221 | — | 31 Dec 2025 | |
| LPL Financial LLC |
13F
|
Company |
0.13%
|
181,142
|
$960,053 | — | 31 Dec 2025 | |
| RAYMOND JAMES FINANCIAL INC |
13F
|
Company |
0.12%
|
171,341
|
$908,108 | — | 31 Dec 2025 | |
| OSAIC HOLDINGS, INC. |
13F
|
Company |
—
mixed-class rows
|
171,211
mixed-class rows
|
$907,157 | — | 31 Dec 2025 | |
| BANK OF MONTREAL /CAN/ |
13F
|
Company |
0.12%
|
168,938
|
$895,372 | — | 31 Dec 2025 | |
| Altshuler Shaham Ltd |
13F
|
Company |
—
class O/S missing
|
479,999
|
$892,798 | — | 31 Dec 2025 | |
| D. E. Shaw & Co., Inc. |
13F
|
Company |
—
mixed-class rows
|
177,433
mixed-class rows
|
$790,078 | — | 31 Dec 2025 | |
| Dean C. Kehler |
3/4/5
|
Director |
—
mixed-class rows
|
262,583
mixed-class rows
|
$752,543 | — | 15 Dec 2025 | |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC |
13F
|
Company |
0.1%
|
140,200
|
$743,060 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for NIOCORP DEVELOPMENTS LTD
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Mark A. Smith | NB | Common Shares | Exercise of in-the-money or at-the-money derivative security | 2.06% | 46,801 | 2,318,819 | 15 Dec 2025 | Direct | ||
| Mark A. Smith | NB | Common Share Purchase Warrant (right to buy) | Exercise of in-the-money or at-the-money derivative security | -100% | -46,801 | 0 | 15 Dec 2025 | Direct | ||
| Neal S. Shah | NB | Common Shares | Exercise of in-the-money or at-the-money derivative security | 14.2% | 9,361 | 75,032 | 15 Dec 2025 | Direct | ||
| Neal S. Shah | NB | Common Share Purchase Warrant (right to buy) | Exercise of in-the-money or at-the-money derivative security | -100% | -9,361 | 0 | 15 Dec 2025 | Direct | ||
| Dean C. Kehler | NB | Common Shares | Exercise of in-the-money or at-the-money derivative security | 58% | 78,003 | 212,583 | 15 Dec 2025 | Direct | ||
| Dean C. Kehler | NB | Common Share Purchase Warrant (right to buy) | Exercise of in-the-money or at-the-money derivative security | -100% | -78,003 | 0 | 15 Dec 2025 | Direct | ||
| Ernest M. Cleave | NB | Employee Stock Option (Right to Buy) | Award | 100,000 | 100,000 | 18 Aug 2025 | Direct | |||
| Anthony W. Fulton | NB | Director Stock Option (Right to Buy) | Award | 50,000 | 50,000 | 18 Aug 2025 | Direct | |||
| James T. Sims | NB | Employee Stock Option (Right to Buy) | Award | 250,000 | 250,000 | 18 Aug 2025 | Direct | |||
| Neal S. Shah | NB | Employee Stock Option (Right to Buy) | Award | 250,000 | 250,000 | 18 Aug 2025 | Direct | |||
| Peter Robert Oliver | NB | Director Stock Option (Right to Buy) | Award | 60,000 | 60,000 | 18 Aug 2025 | Direct | |||
| Dean C. Kehler | NB | Director Stock Option (Right to Buy) | Award | 50,000 | 50,000 | 18 Aug 2025 | Direct | |||
| Scott Honan | NB | Employee Stock Option (Right to Buy) | Award | 250,000 | 250,000 | 18 Aug 2025 | Direct | |||
| Nilsa Guerrero-Mahon | NB | Director Stock Option (Right to Buy) | Award | 55,000 | 55,000 | 18 Aug 2025 | Direct | |||
| David Coates Beling | NB | Director Stock Option (Right to Buy) | Award | 50,000 | 50,000 | 18 Aug 2025 | Direct | |||
| Mark A. Smith | NB | Employee Stock Option (Right to Buy) | Award | 375,000 | 375,000 | 18 Aug 2025 | Direct | |||
| Michael G. Maselli | NB | Director Stock Option (Right to Buy) | Award | 50,000 | 50,000 | 18 Aug 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.