RENAISSANCE TECHNOLOGIES LLC KYNB — FIBROGEN INC

Ownership history in RENAISSANCE TECHNOLOGIES LLC  ·  11 quarters on record

AI Ownership Summary

RENAISSANCE TECHNOLOGIES LLC reported FIBROGEN INC (KYNB) in 11 quarterly 13F filings from 2025 Q2 through 2026 Q1. The latest visible filing shows KYNB at 0.00% 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 KYNB ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was RENAISSANCE TECHNOLOGIES LLC's position in FIBROGEN 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

KYNB was reported at 0.00% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.0% in 2025 Q3

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

Time in book
Holding Window
2025 Q2 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.

KYNB stock page RENAISSANCE TECHNOLOGIES LLC fund profile RENAISSANCE TECHNOLOGIES LLC full holdings
How RENAISSANCE TECHNOLOGIES LLC held KYNB — position size vs. price
% of Fund (quarterly)    KYNB price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 4 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 REDUCED — — — 27,481 -4,200 -13.3% 0.00% $186K 2026-05-14 $7.01
2025 Q4 ADDED — — — 31,681 +2,400 +8.2% 0.00% $278K 2026-02-12 $7.48
2025 Q3 ADDED — — — 29,281 +18,100 +161.9% 0.00% $359K 2025-11-14 (Est.) $8.69
2025 Q2 REDUCED 64.7% +132.3% ❌ 11,181 -20,500 -64.7% 0.00% $59K 2025-08-13 $9.88
7 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding KYNB

As of 2026 Q1 — sorted by position size

Birchview Capital, LP 3Y 7Y 0.09% ARMISTICE CAPITAL, LLC 3Y 7Y 0.05% ACADIAN ASSET MANAGEMENT LLC 3Y 7Y 0.0% TWO SIGMA ADVISERS, LP 3Y 7Y 0.0% HighTower Advisors, LLC 3Y 7Y 0.0% TWO SIGMA INVESTMENTS, LP 3Y 7Y 0.0% SUSQUEHANNA INTERNATIONAL GROUP, LLP 3Y 7Y 0.0% Tower Research Capital LLC (TRC) 3Y 7Y 0.0% GROUP ONE TRADING LLC 3Y 7Y 0.0% VANGUARD FIDUCIARY TRUST CO 0.0%

FAQ About RENAISSANCE TECHNOLOGIES LLC and KYNB

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

How long has RENAISSANCE TECHNOLOGIES LLC reported owning KYNB?

RENAISSANCE TECHNOLOGIES LLC reported KYNB across 4 quarterly 13F filings, from 2025 Q2 through 2026 Q1.

What was the largest reported KYNB position in RENAISSANCE TECHNOLOGIES LLC's portfolio?

The largest reported portfolio weight for KYNB was 0.00% in 2025 Q3.

What is the latest reported KYNB position on this page?

The most recent filing on this page is 2026 Q1, when RENAISSANCE TECHNOLOGIES LLC reported 27,481 shares, equal to 0.00% of portfolio, with an estimated market value of $186K.

What does the chart on this KYNB ownership page compare?

The chart compares RENAISSANCE TECHNOLOGIES LLC's quarterly KYNB 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 RENAISSANCE TECHNOLOGIES LLC time their KYNB position?

Based on 13F filing dates vs. subsequent KYNB price moves, RENAISSANCE TECHNOLOGIES LLC correctly timed 1 out of 3 reported position changes (33%). The annualised alpha on KYNB relative to SPY over the holding period was -38.8%.

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