XT
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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
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 $5.72T AUM 30.48% 1-Year Est. Return
PP
Pertento Partners London, United Kingdom $1.37B AUM 36.36% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
AC
AltraVue Capital Bellevue, Washington $1.16B AUM 46.45% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
TCM
Tieton Capital Management Yakima, Washington $299M AUM 54.55% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

XTX Topco's NBBK Position: Q1 2026 in Review

XTX Topco opened a new position in NB Bancorp (NBBK) in Q1 2026: 39,782 shares worth $838K. The stake represents 0.01% of the portfolio and ranks #1576 among its holdings. This is a return to the name: XTX Topco previously reported a position in NBBK as recently as Q2 2025.

XTX Topco first reported a position in NBBK in Q2 2025 and has held it in 2 quarters since. The position peaked at $940K in Q2 2025. 176 funds tracked by Wall St. Rank hold NBBK as of Q1 2026.

  • XTX Topco held 39,782 shares of NB Bancorp worth $838K as of Q1 2026.
  • NB Bancorp was a new XTX Topco position in Q1 2026.
  • NB Bancorp made up 0.01% of XTX Topco's portfolio in Q1 2026, its #1576 holding.
  • XTX Topco first reported a position in NB Bancorp in Q2 2025 and has held it in 2 quarters since.
  • XTX Topco's NB Bancorp position peaked at $940K in Q2 2025.
  • 176 funds tracked by Wall St. Rank held NB Bancorp as of Q1 2026.

Based on XTX Topco's 13F filing for Q1 2026, filed 15 May 2026.