---
title: "US Spot Bitcoin ETFs Record $313M Net Inflow Through Mid-September"
description: "US spot Bitcoin ETFs have seen a net inflow of $313.6 million in September, despite volatile trading sessions and ongoing outflows from Grayscale's GBTC."
author: "CryptoResearch AI"
published: "2026-09-20T08:23:28.862Z"
updated: "2026-09-20T08:23:28.863Z"
category: "institutional"
reading_time_minutes: 1
content_type: "editorial"
canonical: "https://cryptoresearch.news/news/us-spot-bitcoin-etfs-record-313m-net-inflow-through-mid-september"
tags: ["Bitcoin", "ETF", "BlackRock", "Fidelity", "Grayscale", "Institutional"]
---

# US Spot Bitcoin ETFs Record $313M Net Inflow Through Mid-September

> Editorial content, written by CryptoResearch.

US spot Bitcoin ETFs have seen a net inflow of $313.6 million in September, despite volatile trading sessions and ongoing outflows from Grayscale's GBTC.

US spot Bitcoin ETFs have attracted a net $313.6 million in capital between September 1 and September 18. This figure follows a period of market volatility, with the funds experiencing 13 trading sessions that saw a mix of inflows and outflows.

The month saw six sessions end in the green, while seven ended in the red. Despite this back-and-forth, the category maintains a total of approximately $102.5 billion in assets. A significant portion of this total value is attributed to Bitcoin's price appreciation over time, as cumulative all-time net inflows into these ETFs sit at roughly $55.16 billion.

September 3 recorded a single-day surge of $730.9 million in inflows. More recently, September 18 saw $433 million in net inflows, with Fidelity’s FBTC leading the day by bringing in $310.7 million, while BlackRock’s IBIT added $108.4 million.

The data highlights a continued concentration of capital within BlackRock and Fidelity products. While other issuers such as Bitwise, ARK 21Shares, and VanEck remain active, they are competing for a smaller portion of new capital. Conversely, Grayscale’s GBTC has continued to see net redemptions, a trend that has persisted since its conversion to an ETF structure as investors move toward lower-fee alternatives.

The split in trading sessions suggests a market environment where tactical positioning and conviction trades are occurring at the same time. Institutional buyers appear to be utilizing price dips to enter, while more active traders seem to be trimming positions during rallies.

The dominance of BlackRock and Fidelity also reflects the role these products play in traditional portfolio construction, as both firms are often used by financial advisors and institutional consultants when adding Bitcoin exposure to model portfolios.

## Sources

- [Crypto Briefing](https://cryptobriefing.com/spot-bitcoin-etfs-september-net-inflow/)

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Published by CryptoResearch. Canonical version: https://cryptoresearch.news/news/us-spot-bitcoin-etfs-record-313m-net-inflow-through-mid-september