Woodline Partners LP XOMA — XOMA CORP DEL

Ownership history in Woodline Partners LP  ·  10 quarters on record

AI Ownership Summary

Woodline Partners LP reported XOMA CORP DEL (XOMA) in 10 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 0.08% in 2026 Q1. The latest visible filing shows XOMA at 0.08% 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 XOMA ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Woodline Partners LP's position in XOMA CORP DEL, 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

XOMA was reported at 0.08% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.08% in 2026 Q1

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

Time in book
Holding Window
2023 Q4 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.

XOMA stock page Woodline Partners LP fund profile Woodline Partners LP full holdings
How Woodline Partners LP held XOMA — position size vs. price
% of Fund (quarterly)    XOMA price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 10 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 ADDED — — — 640,001 +377,068 +143.4% 0.08% $20.1M 2026-05-15 $41.75
2025 Q4 ADDED — — — 262,933 +52,988 +25.2% 0.03% $7.0M 2026-02-17 $24.47
2025 Q3 ADDED — — — 209,945 +29,715 +16.5% 0.04% $8.1M 2025-11-14 $32.64
2025 Q2 ADDED — — — 180,230 +11,680 +6.9% 0.02% $4.5M 2025-08-14 $31.59
2025 Q1 ADDED — — — 168,550 +12,284 +7.9% 0.02% $3.4M 2025-05-15 $26.90
2024 Q4 ADDED — — — 156,266 +60,927 +63.9% 0.03% $4.1M 2025-02-14 $26.76
2024 Q3 ADDED — — — 95,339 +23,128 +32.0% 0.02% $2.5M 2024-11-14 $29.88
2024 Q2 ADDED — — — 72,211 +105 +0.1% 0.02% $1.7M 2024-08-14 $26.16
2024 Q1 ADDED — — — 72,106 +21,547 +42.6% 0.02% $1.7M 2024-05-15 $24.71
2023 Q4 INITIATED — — — 50,559 — — 0.01% $935K 2024-02-14 $20.40

🏢 Other funds also holding XOMA

As of 2026 Q1 — sorted by position size

TLS Advisors LLC 3Y 8.55% BVF INC/IL 3Y 7Y 2.59% Simcoe Capital LLC 1.96% Opaleye Management Inc. 3Y 7Y 1.24% CM Management, LLC 3Y 1.05% Stonepine Capital Management, LLC 3Y 7Y 0.87% NANO CAP NEW MILLENNIUM GROWTH FUND L P 0.5% HighVista Strategies LLC 3Y 7Y 0.41% GW&K Investment Management, LLC 3Y 7Y 0.06% DIVERSIFIED MANAGEMENT INC 0.05%

FAQ About Woodline Partners LP and XOMA

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

How long has Woodline Partners LP reported owning XOMA?

Woodline Partners LP reported XOMA across 10 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported XOMA position in Woodline Partners LP's portfolio?

The largest reported portfolio weight for XOMA was 0.08% in 2026 Q1.

What is the latest reported XOMA position on this page?

The most recent filing on this page is 2026 Q1, when Woodline Partners LP reported 640,001 shares, equal to 0.08% of portfolio, with an estimated market value of $20.1M.

What does the chart on this XOMA ownership page compare?

The chart compares Woodline Partners LP's quarterly XOMA 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 Woodline Partners LP time their XOMA position?

Based on 13F filing dates vs. subsequent XOMA price moves, Woodline Partners LP correctly timed 7 out of 9 reported position changes (78%). The annualised alpha on XOMA relative to SPY over the holding period was +14.0%.

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