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Harbor Advisors’s NB Bancorp NBBK Stock Holding History

Harbor Advisors’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 		$370K Buy
17,500
+7,500
+75% +$154K 0.05% 145
2026
Q1 		$211K Hold
10,000
– – 0.03% 182
2025
Q4 		$198K Hold
10,000
– – 0.03% 181
2025
Q3 		$177K Buy
+10,000
New +$183K 0.03% 180

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

Harbor Advisors's NBBK Position: Q2 2026 in Review

Harbor Advisors increased its NB Bancorp (NBBK) stake by 75% in Q2 2026, buying an estimated $154K and bringing the position to 17,500 shares worth $370K. The position accounts for 0.05% of the portfolio, ranked #145.

Harbor Advisors first reported a position in NBBK in Q3 2025 and has held it in 4 quarters since. 161 funds tracked by Wall St. Rank hold NBBK as of Q2 2026.

  • Harbor Advisors held 17,500 shares of NB Bancorp worth $370K as of Q2 2026.
  • Harbor Advisors bought 7,500 NB Bancorp shares in Q2 2026, an estimated $154K.
  • NB Bancorp made up 0.05% of Harbor Advisors's portfolio in Q2 2026, its #145 holding.
  • Harbor Advisors first reported a position in NB Bancorp in Q3 2025 and has held it in 4 quarters since.
  • 161 funds tracked by Wall St. Rank held NB Bancorp as of Q2 2026.

Based on Harbor Advisors's 13F filing for Q2 2026, filed 28 Jul 2026.