Harbor Advisors LLC ANNX — ANNEXON INC

Ownership history in Harbor Advisors LLC  ·  9 quarters on record

AI Ownership Summary

Harbor Advisors LLC reported ANNEXON INC (ANNX) in 9 quarterly 13F filings from 2024 Q2 through 2026 Q2. Peak portfolio weight reached 0.01% in 2024 Q3. The latest visible filing shows ANNX at 0.01% 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 ANNX ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Harbor Advisors LLC's position in ANNEXON 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
2026 Q2

ANNX was reported at 0.01% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.01% in 2024 Q3

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

Time in book
Holding Window
2024 Q2 to 2026 Q2

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.

ANNX stock page Harbor Advisors LLC fund profile Harbor Advisors LLC full holdings
How Harbor Advisors LLC held ANNX — position size vs. price
% of Fund (quarterly)    ANNX price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 9 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q2 UNCHANGED — — — 10,000 — 0% 0.01% $57K 2026-07-28 $nan
2026 Q1 UNCHANGED — — — 10,000 — 0% 0.01% $55K 2026-05-07 $5.52
2025 Q4 UNCHANGED — — — 10,000 — 0% 0.01% $50K 2026-01-30 $6.24
2025 Q3 UNCHANGED — — — 10,000 — 0% 0.00% $30K 2025-11-12 $2.84
2025 Q2 UNCHANGED — — — 10,000 — 0% 0.00% $24K 2025-08-13 $2.60
2025 Q1 UNCHANGED — — — 10,000 — 0% 0.00% $19K 2025-05-15 $1.81
2024 Q4 UNCHANGED — — — 10,000 — 0% 0.01% $51K 2025-02-11 $3.11
2024 Q3 UNCHANGED — — — 10,000 — 0% 0.01% $59K 2024-11-14 $6.33
2024 Q2 INITIATED — — — 10,000 — — 0.01% $49K 2024-07-30 $6.21

🏢 Other funds also holding ANNX

As of 2026 Q2 — sorted by position size

AlphaCentric Advisors LLC 3Y 0.12% Y-Intercept (Hong Kong) Ltd 3Y 0.08% Hennion & Walsh Asset Management, Inc. 3Y 0.08% MOUNT VERNON ASSOCIATES INC /MD/ 3Y 7Y 0.04% Crown Wealth Group, LLC 3Y 0.03% Allegheny Financial Group 3Y 0.03% China Universal Asset Management Co., Ltd. 3Y 0.02% Balefire, LLC 3Y 7Y 0.01% Diversified Trust Co 3Y 7Y 0.01% SBI Securities Co., Ltd. 0.0%

FAQ About Harbor Advisors LLC and ANNX

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

How long has Harbor Advisors LLC reported owning ANNX?

Harbor Advisors LLC reported ANNX across 9 quarterly 13F filings, from 2024 Q2 through 2026 Q2.

What was the largest reported ANNX position in Harbor Advisors LLC's portfolio?

The largest reported portfolio weight for ANNX was 0.01% in 2024 Q3.

What is the latest reported ANNX position on this page?

The most recent filing on this page is 2026 Q2, when Harbor Advisors LLC reported 10,000 shares, equal to 0.01% of portfolio, with an estimated market value of $57K.

What does the chart on this ANNX ownership page compare?

The chart compares Harbor Advisors LLC's quarterly ANNX 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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