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Prospector Partners’s NB Bancorp NBBK Stock Holding History

Prospector Partners’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
2025
Q4 		– Sell
-150,862
Closed -$2.66M – 56
2025
Q3 		$2.66M Sell
150,862
-16,760
-10% -$307K 0.32% 71
2025
Q2 		$2.99M Sell
167,622
-74,650
-31% -$1.26M 0.34% 71
2025
Q1 		$4.38M Hold
242,272
– – 0.49% 63
2024
Q4 		$4.38M Hold
242,272
– – 0.49% 66
2024
Q3 		$4.5M Hold
242,272
– – 0.47% 68
2024
Q2 		$3.65M Buy
+242,272
New +$3.53M 0.41% 71

Other funds holding NBBK

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
PP
Pertento Partners London, United Kingdom $1.86B AUM 53.86% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 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
Hotchkis & Wiley Capital Management
Hotchkis & Wiley Capital Management Los Angeles, California $34.3B AUM 22.63% 1-Year Est. Return
AC
AltraVue Capital Bellevue, Washington $1.39B AUM 53.77% 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

Prospector Partners's NBBK Position: Q4 2025 in Review

Prospector Partners sold out of NB Bancorp (NBBK) in Q4 2025, closing a stake of 150,862 shares — an estimated $2.66M sold.

Prospector Partners first reported a position in NBBK in Q2 2024 and held it in 6 quarters. The position peaked at $4.5M in Q3 2024. 163 funds tracked by Wall St. Rank hold NBBK as of Q4 2025.

  • Prospector Partners reported no remaining NB Bancorp position as of Q4 2025 after selling out during the quarter.
  • Prospector Partners sold 150,862 NB Bancorp shares in Q4 2025, an estimated $2.66M.
  • Prospector Partners first reported a position in NB Bancorp in Q2 2024 and held it in 6 quarters.
  • Prospector Partners's NB Bancorp position peaked at $4.5M in Q3 2024.
  • 163 funds tracked by Wall St. Rank held NB Bancorp as of Q4 2025.

Based on Prospector Partners's 13F filing for Q4 2025, filed 13 Feb 2026.