Comparable stake leader
BlackRock, Inc.
SEC ownership of NIOCORP DEVELOPMENTS LTD
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001512228.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
- Public ticker
- NB, NIOBW on Nasdaq
- Parsed ownership sources
-
13F and 13D/G
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
BlackRock, Inc.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
BlackRock, Inc.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001512228
- Issuer location
- Centennial, CO
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of NIOCORP DEVELOPMENTS LTD (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
13F
13D/G
Lead comparable stake: 4.8%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 4.8%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
4.8%
CITADEL ADVISORS LLC
4.3%
Brevan Howard Capital Management LP
4.6%
Alyeska Investment Group, L.P.
3%
GOLDMAN SACHS GROUP INC
2.3%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
4.8%
from 13D/G
|
$31,299,200
7,017,758 shares
|
— | 31 Mar 2026 |
| CITADEL ADVISORS LLC |
13D/G
13F
Kenneth Griffin · Company
|
4.3%
|
$27,724,925
6,216,351 shares
|
+$25,460,182 | 25 Feb 2026 |
| Brevan Howard Capital Management LP |
13F
Company
|
4.6%
|
$28,047,625
6,485,000 shares
|
— | 31 Mar 2026 |
| Alyeska Investment Group, L.P. |
13F
Company
|
3%
|
$19,238,687
4,313,607 shares
|
— | 31 Mar 2026 |
| GOLDMAN SACHS GROUP INC |
13F
Company
|
2.3%
|
$14,661,640
3,287,363 shares
|
— | 31 Mar 2026 |
| PRIVATE MANAGEMENT GROUP INC |
13F
Company
|
1.5%
|
$9,568,323
2,145,364 shares
|
— | 31 Mar 2026 |
| STATE STREET CORP |
13F
Company
|
1.5%
|
$9,223,543
2,068,059 shares
|
— | 31 Mar 2026 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
1.1%
|
$6,940,861
1,556,532 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 19 Jun 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 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 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-15 of 15 reporting-owner rows connected to NIOCORP DEVELOPMENTS LTD. Open a relationship link for the CIK-to-CIK filing trail.
Rows
15
Largest Forms 3/4/5 holder
Mark A. Smith
Net 12M change
$0
Latest report
15 Dec 2025
| 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 |
Recent insider transactions for NIOCORP DEVELOPMENTS LTD
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported 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 |
* marks a reported price that did not pass the local price check.