AXSM — AXSOME THERAPEUTICS INC

Ownership history in Fairmount Funds Management LLC  ·  23 quarters on record

AI Ownership Summary

Fairmount Funds Management LLC reported AXSOME THERAPEUTICS INC (AXSM) in 23 quarterly 13F filings from 2023 Q3 through 2025 Q3. Peak portfolio weight reached 21.46% in 2024 Q2. The latest visible filing shows AXSM at 8.91% 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. Older history is available after unlock; the visible window still shows the most recent pattern.

What this AXSM ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Fairmount Funds Management LLC's position in AXSOME THERAPEUTICS INC, 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
2025 Q3

AXSM was reported at 8.91% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
21.46% in 2024 Q2

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

Time in book
Holding Window
2023 Q3 to 2025 Q3

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.

AXSM stock page Fairmount Funds Management LLC fund profile Fairmount Funds Management LLC full holdings
How Fairmount Funds Management LLC held AXSM — position size vs. price
% of Fund (quarterly)    AXSM price (quarter-end, indexed to 100)
📋 Quarterly Holdings History 9 quarters  ▾
Quarter Action Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q3 UNCHANGED 815,176 — 0% 8.91% $99.0M 2025-11-14 $139.69
2025 Q2 UNCHANGED 815,176 — 0% 11.02% $85.1M 2025-08-14 $108.75
2025 Q1 REDUCED 815,176 -653,807 -44.5% 14.75% $95.1M 2025-05-15 $107.22
2024 Q4 REDUCED 1,468,983 -891,094 -37.8% 12.36% $124.3M 2025-02-14 $131.15
2024 Q3 UNCHANGED 2,360,077 — 0% 17.20% $212.1M 2024-11-14 $97.37
2024 Q2 UNCHANGED 2,360,077 — 0% 21.46% $190.0M 2024-08-14 $84.83
2024 Q1 UNCHANGED 2,360,077 — 0% 20.53% $188.3M 2024-05-15 $75.93
2023 Q4 ADDED 2,360,077 +18,839 +0.8% 19.85% $187.8M 2024-02-14 $93.29
2023 Q3 REDUCED 2,341,238 -3,742 -0.2% 19.69% $163.6M 2023-11-14 $62.66
14 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding AXSM

As of 2025 Q4 — sorted by position size

ALETHEA CAPITAL MANAGEMENT, LLC 3Y 7Y 59.3% KVP Capital Advisors, LP 6.4% IRIDIAN ASSET MANAGEMENT LLC/CT 3Y 7Y 4.96% Tri Locum Partners LP 3Y 4.78% PFM Health Sciences, LP 3Y 7Y 4.58% Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A. 4.52% First Turn Management, LLC 4.32% Deep Track Capital, LP 3Y 3.74% SUPERSTRING CAPITAL MANAGEMENT LP 3.66% Rhenman & Partners Asset Management AB 3Y 7Y 1.96%

FAQ About Fairmount Funds Management LLC and AXSM

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

How long has Fairmount Funds Management LLC reported owning AXSM?

Fairmount Funds Management LLC reported AXSM across 9 quarterly 13F filings, from 2023 Q3 through 2025 Q3.

What was the largest reported AXSM position in Fairmount Funds Management LLC's portfolio?

The largest reported portfolio weight for AXSM was 21.46% in 2024 Q2.

What is the latest reported AXSM position on this page?

The most recent filing on this page is 2025 Q3, when Fairmount Funds Management LLC reported 815,176 shares, equal to 8.91% of portfolio, with an estimated market value of $99.0M.

What does the chart on this AXSM ownership page compare?

The chart compares Fairmount Funds Management LLC's quarterly AXSM 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.

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