XT
NBBK icon

XTX Topco’s NB Bancorp NBBK Stock Holding History

XTX Topco’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 		$886K Buy
41,912
+2,130
+5% +$43.8K 0.01% 1899
2026
Q1 		$838K Buy
+39,782
New +$836K 0.01% 1576
2025
Q3 		– Sell
-52,620
Closed -$940K – 3028
2025
Q2 		$940K Buy
+52,620
New +$889K 0.04% 703

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

XTX Topco's NBBK Position: Q2 2026 in Review

XTX Topco increased its NB Bancorp (NBBK) stake by 5.4% in Q2 2026, buying an estimated $43.8K and bringing the position to 41,912 shares worth $886K. The position accounts for 0.01% of the portfolio, ranked #1899.

XTX Topco first reported a position in NBBK in Q2 2025 and has held it in 3 quarters since. The position peaked at $940K in Q2 2025. 161 funds tracked by Wall St. Rank hold NBBK as of Q2 2026.

  • XTX Topco held 41,912 shares of NB Bancorp worth $886K as of Q2 2026.
  • XTX Topco bought 2,130 NB Bancorp shares in Q2 2026, an estimated $43.8K.
  • NB Bancorp made up 0.01% of XTX Topco's portfolio in Q2 2026, its #1899 holding.
  • XTX Topco first reported a position in NB Bancorp in Q2 2025 and has held it in 3 quarters since.
  • XTX Topco's NB Bancorp position peaked at $940K in Q2 2025.
  • 161 funds tracked by Wall St. Rank held NB Bancorp as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.