TANG CAPITAL MANAGEMENT LLC KZR — KEZAR LIFE SCIENCES INC

Ownership history in TANG CAPITAL MANAGEMENT LLC  ·  9 quarters on record

AI Ownership Summary

TANG CAPITAL MANAGEMENT LLC reported KEZAR LIFE SCIENCES INC (KZR) in 9 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 0.32% in 2024 Q4. The latest visible filing shows KZR at 0.25% 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 KZR ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was TANG CAPITAL MANAGEMENT LLC's position in KEZAR LIFE SCIENCES 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 Q1

KZR was reported at 0.25% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.32% in 2024 Q4

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.

KZR stock page TANG CAPITAL MANAGEMENT LLC fund profile TANG CAPITAL MANAGEMENT LLC full holdings
How TANG CAPITAL MANAGEMENT LLC held KZR — position size vs. price
% of Fund (quarterly)    KZR 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 Q1 UNCHANGED — — — 664,314 — 0% 0.25% $4.9M 2026-05-15 $7.29
2025 Q4 REDUCED 7.7% +18.0% ❌ 664,314 -55,686 -7.7% 0.21% $4.2M 2026-02-17 $6.32
2025 Q3 UNCHANGED — — — 720,000 — 0% 0.11% $2.8M 2025-11-14 $6.18
2025 Q2 UNCHANGED — — — 720,000 — 0% 0.17% $3.3M 2025-08-14 $3.98
2025 Q1 UNCHANGED — — — 720,000 — 0% 0.19% $3.5M 2025-05-15 $4.06
2024 Q4 REDUCED 80.2% -27.4% ✅ 720,000 -2,920,300 -80.2% 0.32% $4.8M 2025-02-14 $5.89
2024 Q3 ADDED — — — 3,640,300 +2,951,357 +428.4% 0.20% $2.8M 2024-11-14 $7.52
2024 Q1 ADDED — — — 688,943 +382,278 +124.7% 0.06% $621K 2024-05-15 $7.72
2023 Q4 INITIATED — — — 306,665 — — 0.03% $291K 2024-02-14 $8.42

🏢 Other funds also holding KZR

As of 2026 Q1 — sorted by position size

BML Capital Management, LLC 3Y 3.43% Rangeley Capital, LLC 1.75% Peapod Lane Capital LLC 0.76% Aldebaran Capital, LLC 3Y 0.46% Vazirani Asset Management LLC 3Y 0.38% EQUITEC PROPRIETARY MARKETS, LLC 3Y 7Y 0.15% SUVRETTA CAPITAL MANAGEMENT, LLC 3Y 7Y 0.14% Affinity Asset Advisors, LLC 3Y 0.09% EQUITEC PROPRIETARY MARKETS, LLC 3Y 7Y 0.08% Ikarian Capital, LLC 3Y 0.06%

FAQ About TANG CAPITAL MANAGEMENT LLC and KZR

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

How long has TANG CAPITAL MANAGEMENT LLC reported owning KZR?

TANG CAPITAL MANAGEMENT LLC reported KZR across 9 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported KZR position in TANG CAPITAL MANAGEMENT LLC's portfolio?

The largest reported portfolio weight for KZR was 0.32% in 2024 Q4.

What is the latest reported KZR position on this page?

The most recent filing on this page is 2026 Q1, when TANG CAPITAL MANAGEMENT LLC reported 664,314 shares, equal to 0.25% of portfolio, with an estimated market value of $4.9M.

What does the chart on this KZR ownership page compare?

The chart compares TANG CAPITAL MANAGEMENT LLC's quarterly KZR 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 TANG CAPITAL MANAGEMENT LLC time their KZR position?

Based on 13F filing dates vs. subsequent KZR price moves, TANG CAPITAL MANAGEMENT LLC correctly timed 1 out of 5 reported position changes (20%). The annualised alpha on KZR relative to SPY over the holding period was -22.2%.

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