Mariner
NBBK icon

Mariner’s NB Bancorp NBBK Stock Holding History

Mariner’s Portfolio NBBK Stock Details NBBK Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$897K Sell
42,471
-7,024
-14% -$145K ﹤0.01% 2029
2026
Q1 		$1.04M Buy
49,495
+13,129
+36% +$276K ﹤0.01% 1936
2025
Q4 		$721K Buy
36,366
+24,003
+194% +$457K ﹤0.01% 2190
2025
Q3 		$218K Buy
+12,363
New +$227K ﹤0.01% 3099

Other funds holding NBBK

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
AC
AltraVue Capital Bellevue, Washington $1.39B AUM 53.77% 1-Year Est. Return
PP
Pertento Partners London, United Kingdom $1.86B AUM 53.86% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
TCM
Tieton Capital Management Yakima, Washington $348M AUM 45.13% 1-Year Est. Return
Hotchkis & Wiley Capital Management
Hotchkis & Wiley Capital Management Los Angeles, California $34.3B AUM 22.63% 1-Year Est. Return

Mariner's NBBK Position: Q2 2026 in Review

Mariner reduced its NB Bancorp (NBBK) stake by 14% in Q2 2026, selling an estimated $145K and leaving 42,471 shares worth $897K. The position accounts for ﹤0.01% of the portfolio, ranked #2029.

Mariner first reported a position in NBBK in Q3 2025 and has held it in 4 quarters since. The position peaked at $1.04M in Q1 2026. 161 funds tracked by Wall St. Rank hold NBBK as of Q2 2026.

  • Mariner held 42,471 shares of NB Bancorp worth $897K as of Q2 2026.
  • Mariner sold 7,024 NB Bancorp shares in Q2 2026, an estimated $145K.
  • NB Bancorp made up ﹤0.01% of Mariner's portfolio in Q2 2026, its #2029 holding.
  • Mariner first reported a position in NB Bancorp in Q3 2025 and has held it in 4 quarters since.
  • Mariner's NB Bancorp position peaked at $1.04M in Q1 2026.
  • 161 funds tracked by Wall St. Rank held NB Bancorp as of Q2 2026.

Based on Mariner's 13F filing for Q2 2026, filed 13 Aug 2026.