GAMMA Investing LLC NBBK — NB BANCORP INC COM

Ownership history in GAMMA Investing LLC  ·  7 quarters on record

AI Ownership Summary

GAMMA Investing LLC reported NB BANCORP INC COM (NBBK) in 7 quarterly 13F filings from 2024 Q3 through 2026 Q1. The latest visible filing shows NBBK at 0.00% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings.

What this NBBK ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was GAMMA Investing LLC's position in NB BANCORP INC COM, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2026 Q1

NBBK was reported at 0.00% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.0% in 2025 Q1

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2024 Q3 to 2026 Q1

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

NBBK stock page GAMMA Investing LLC fund profile GAMMA Investing LLC full holdings
How GAMMA Investing LLC held NBBK — position size vs. price
% of Fund (quarterly)    NBBK price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 7 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 ADDED — — — 553 +54 +10.8% 0.00% $12K 2026-04-06 $21.75
2025 Q4 ADDED — — — 499 +103 +26.0% 0.00% $10K 2026-01-05 $19.82
2025 Q3 ADDED — — — 396 +25 +6.7% 0.00% $7K 2025-10-02 $17.42
2025 Q2 REDUCED 92.6% -0.1% ✅ 371 -4,616 -92.6% 0.00% $7K 2025-07-14 $18.98
2025 Q1 ADDED — — — 4,987 +4,713 +1720.1% 0.00% $276K 2025-04-07 $15.70
2024 Q4 ADDED — — — 274 +4 +1.5% 0.00% $5K 2025-01-03 $17.59
2024 Q3 INITIATED — — — 270 — — 0.00% $5K 2024-10-07 $17.48

🏢 Other funds also holding NBBK

As of 2026 Q1 — sorted by position size

Tieton Capital Management, LLC 3Y 7Y 3.91% Pertento Partners LLP 3Y 3.4% AltraVue Capital, LLC 3Y 7Y 2.37% Oppenheimer & Close, LLC 3Y 7Y 1.1% Stilwell Value LLC 3Y 7Y 0.82% EJF Capital LP 3Y 7Y 0.62% Legato Capital Management LLC 3Y 7Y 0.53% RAFFLES ASSOCIATES LP 3Y 7Y 0.27% Four Tree Island Advisory LLC 0.27% Round Rock Advisors LLC 3Y 0.21%

FAQ About GAMMA Investing LLC and NBBK

These are the practical questions this page is built to answer before you even open the full history table.

How long has GAMMA Investing LLC reported owning NBBK?

GAMMA Investing LLC reported NBBK across 7 quarterly 13F filings, from 2024 Q3 through 2026 Q1.

What was the largest reported NBBK position in GAMMA Investing LLC's portfolio?

The largest reported portfolio weight for NBBK was 0.00% in 2025 Q1.

What is the latest reported NBBK position on this page?

The most recent filing on this page is 2026 Q1, when GAMMA Investing LLC reported 553 shares, equal to 0.00% of portfolio, with an estimated market value of $12K.

What does the chart on this NBBK ownership page compare?

The chart compares GAMMA Investing LLC's quarterly NBBK portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did GAMMA Investing LLC time their NBBK position?

Based on 13F filing dates vs. subsequent NBBK price moves, GAMMA Investing LLC correctly timed 5 out of 6 reported position changes (83%). The annualised alpha on NBBK relative to SPY over the holding period was +3.5%.

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