★
Trade Filings
Managers Stocks Filings Superinvestors
Signals Institutional Buying Institutional Selling Insider Activity 13D & 13G Watch Sector Rotation
Tools Stock Screener Manager Screener Compare Managers Consensus Baskets All Research Tools Data API
Learn & AI Learn Ask the Data AI Agents
News ★ Saved
About About us Methodology Contact Disclaimer
Reader
DATA PLANS

Historical data downloads: coming with accounts.

API GATEWAY

Free read-only JSON access to the site's cached data.
Dark mode

Guided View
New to markets (prices, yields, YTD, market cap)? We explain every term as you browse, in plain English. Same data, with the help built in.

Expert View
You already know the market. Just the data: clean, fast and compact, with no extra explanations. This is the default view.

Interface language
Manager record

Quantum Portfolio Management LLC

New York, NY · CIK 2003672 · EDGAR filings ↗

Cover-page record: Trade Filings parses every position for its tracked managers; for this filer it indexes the cover-page totals of each quarterly 13F report on SEC EDGAR.

$278.28MReported 13F valueQ2 2026 · as filed
557Holdings listed
+21.2%vs prior quartervalue change includes market moves
5Quarters on record
Aug 14Latest filed
Reported 13F value by quarter, Q2 2025 to Q2 2026Q2 2025: $209.6M$209.6MQ2 2025232 holdingsQ3 2025: $336.5M$336.5MQ3 2025262 holdingsQ4 2025: $226.4M$226.4MQ4 2025238 holdingsQ1 2026: $229.6M$229.6MQ1 2026254 holdingsQ2 2026: $278.3M$278.3MQ2 2026557 holdings
Reported 13F value by quarter from the cover pages of this filer (live documents; sub-portfolio reports summed), with holdings listed beneath each bar.
Filing record
Aug 14 2026 13F-HR · period Q2 2026

$278.28M · 557 holdings listed · View original SEC filing ↗
May 01 2026 13F-HR/A · period Q1 2026

$229.58M · 254 holdings listed · amendment (restatement) · View original SEC filing ↗
Apr 29 2026 13F-HR · period Q1 2026

$229.96M · 264 holdings listed · View original SEC filing ↗
Feb 12 2026 13F-HR · period Q4 2025

$226.45M · 238 holdings listed · View original SEC filing ↗
Oct 29 2025 13F-HR · period Q3 2025

$336.50M · 262 holdings listed · View original SEC filing ↗
Aug 13 2025 13F-HR · period Q2 2025

$209.58M · 232 holdings listed · View original SEC filing ↗
Provenance: Cover-page totals from the quarterly 13F reports of this filer on SEC EDGAR; position-level holdings are parsed for tracked managers only. Reporting period: Q2 2026 · latest filing Aug 14, 2026 · Change methodology