Mariner
NB

Mariner’s NioCorp Developments NB Stock Holding History

Mariner’s Portfolio NB Stock Details NB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-47,105
Closed -$250K – 3727
2025
Q4 		$250K Buy
47,105
+24,803
+111% +$171K ﹤0.01% 3001
2025
Q3 		$149K Buy
22,302
+5,814
+35% +$24.5K ﹤0.01% 3280
2025
Q2 		$38.4K Buy
16,488
+150
+0.9% +$374 ﹤0.01% 3371
2025
Q1 		$32.2K Hold
16,338
– – ﹤0.01% 3338
2024
Q4 		$25.3K Hold
16,338
– – ﹤0.01% 3339
2024
Q3 		$35.6K Sell
16,338
-864
-5% -$1.58K ﹤0.01% 3220
2024
Q2 		$29.8K Sell
17,202
-220
-1% -$513 ﹤0.01% 3088
2024
Q1 		$47.4K Sell
17,422
-924
-5% -$2.6K ﹤0.01% 3036
2023
Q4 		$58.5K Buy
+18,346
New +$66.3K ﹤0.01% 2926

Other funds holding NB

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
BHCM
Brevan Howard Capital Management St. Helier, Jersey $11.3B AUM 35.84% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
PMG
Private Management Group Irvine, California $3.47B AUM 13.39% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Citigroup
Citigroup New York $235B AUM 32.99% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return

Mariner's NB Position: Q1 2026 in Review

Mariner sold out of NioCorp Developments (NB) in Q1 2026, closing a stake of 47,105 shares — an estimated $250K sold.

Mariner first reported a position in NB in Q4 2023 and held it in 9 quarters. The position peaked at $250K in Q4 2025. 204 funds tracked by Wall St. Rank hold NB as of Q1 2026.

  • Mariner reported no remaining NioCorp Developments position as of Q1 2026 after selling out during the quarter.
  • Mariner sold 47,105 NioCorp Developments shares in Q1 2026, an estimated $250K.
  • Mariner first reported a position in NioCorp Developments in Q4 2023 and held it in 9 quarters.
  • Mariner's NioCorp Developments position peaked at $250K in Q4 2025.
  • 204 funds tracked by Wall St. Rank held NioCorp Developments as of Q1 2026.

Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.