Ken Griffin
NBBK icon

Ken Griffin’s NB Bancorp NBBK Stock Holding History

Ken Griffin’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 		$2.45M Buy
116,371
+9,914
+9% +$208K ﹤0.01% 5665
2025
Q4 		$2.11M Buy
106,457
+47,130
+79% +$897K ﹤0.01% 5807
2025
Q3 		$1.05M Buy
59,327
+40,432
+214% +$742K ﹤0.01% 7441
2025
Q2 		$337K Buy
+18,895
New +$319K ﹤0.01% 9537
2025
Q1 		– Sell
-6,210
Closed -$115K – 15222
2024
Q4 		$112K Buy
+6,210
New +$119K ﹤0.01% 11297

Other funds holding NBBK

BlackRock
BlackRock New York $6.73T AUM 46.02% 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 $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
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 $348M AUM 45.13% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Ken Griffin's NBBK Position: Q1 2026 in Review

Ken Griffin increased its NB Bancorp (NBBK) stake by 9.3% in Q1 2026, buying an estimated $208K and bringing the position to 116,371 shares worth $2.45M. The position accounts for ﹤0.01% of the portfolio, ranked #5665.

Ken Griffin first reported a position in NBBK in Q4 2024 and has held it in 5 quarters since. 177 funds tracked by Wall St. Rank hold NBBK as of Q1 2026.

  • Ken Griffin held 116,371 shares of NB Bancorp worth $2.45M as of Q1 2026.
  • Ken Griffin bought 9,914 NB Bancorp shares in Q1 2026, an estimated $208K.
  • NB Bancorp made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #5665 holding.
  • Ken Griffin first reported a position in NB Bancorp in Q4 2024 and has held it in 5 quarters since.
  • 177 funds tracked by Wall St. Rank held NB Bancorp as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.