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Round Rock Advisors’s NB Bancorp NBBK Stock Holding History

Round Rock 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 		$1.41M Buy
66,530
+63
+0.1% +$1.3K 0.18% 83
2026
Q1 		$1.4M Buy
66,467
+14,561
+28% +$306K 0.21% 67
2025
Q4 		$1.03M Buy
51,906
+17,936
+53% +$341K 0.15% 104
2025
Q3 		$621K Buy
+33,970
New +$623K 0.1% 141

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

Round Rock Advisors's NBBK Position: Q2 2026 in Review

Round Rock Advisors increased its NB Bancorp (NBBK) stake by 0.09% in Q2 2026, buying an estimated $1.3K and bringing the position to 66,530 shares worth $1.41M. The position accounts for 0.18% of the portfolio, ranked #83.

Round Rock 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.

  • Round Rock Advisors held 66,530 shares of NB Bancorp worth $1.41M as of Q2 2026.
  • Round Rock Advisors bought 63 NB Bancorp shares in Q2 2026, an estimated $1.3K.
  • NB Bancorp made up 0.18% of Round Rock Advisors's portfolio in Q2 2026, its #83 holding.
  • Round Rock 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 Round Rock Advisors's 13F filing for Q2 2026, filed 12 Aug 2026.