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Martingale Asset Management’s NB Bancorp NBBK Stock Holding History

Martingale Asset Management’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 		– Sell
-23,900
Closed -$504K – 869
2026
Q1 		$504K Buy
23,900
+12,200
+104% +$257K 0.01% 636
2025
Q4 		$232K Sell
11,700
-1,700
-13% -$32.3K 0.01% 733
2025
Q3 		$237K Hold
13,400
– – 0.01% 722
2025
Q2 		$239K Sell
13,400
-2,100
-14% -$35.5K 0.01% 734
2025
Q1 		$280K Buy
+15,500
New +$288K 0.01% 689

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

Martingale Asset Management's NBBK Position: Q2 2026 in Review

Martingale Asset Management sold out of NB Bancorp (NBBK) in Q2 2026, closing a stake of 23,900 shares — an estimated $504K sold.

Martingale Asset Management first reported a position in NBBK in Q1 2025 and held it in 5 quarters. The position peaked at $504K in Q1 2026. 161 funds tracked by Wall St. Rank hold NBBK as of Q2 2026.

  • Martingale Asset Management reported no remaining NB Bancorp position as of Q2 2026 after selling out during the quarter.
  • Martingale Asset Management sold 23,900 NB Bancorp shares in Q2 2026, an estimated $504K.
  • Martingale Asset Management first reported a position in NB Bancorp in Q1 2025 and held it in 5 quarters.
  • Martingale Asset Management's NB Bancorp position peaked at $504K in Q1 2026.
  • 161 funds tracked by Wall St. Rank held NB Bancorp as of Q2 2026.

Based on Martingale Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.