Kezar Life Sciences, Inc.
Kezar Life Sciences, Inc. (KZR) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · KZR · as of Sep 30, 2025
Ownership Breakdown
40
Institutional Holders
▲ 1 vs Q2
$16.53M
Total Inst. Value
▼ $3.96M vs Q2
7.39M
Shares Outstanding
freeFloat 82.63%
4.24M
13F Shares Held
▼ 235,177 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
KZR largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BML CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 720.8K | 9.86% | 9.86% | $2.81B | Nov 10, 2025 | ▲ 85.6K |
TANG CAPITAL MANAGEMENT LLC pharmaceutical preparations | 720.0K | 9.85% | 9.85% | $2.81B | Nov 14, 2025 | — held |
SUVRETTA CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 716.8K | 9.80% | 9.80% | $2.80B | Nov 14, 2025 | — held |
STONEPINE CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 383.2K | 5.24% | 5.24% | $1.49B | Nov 13, 2025 | ▲ 213.3K |
VANGUARD GROUP INC pharmaceutical preparations | 268.2K | 3.67% | 3.67% | $1.05B | Nov 7, 2025 | ▼ 8.1K |
ORBIMED ADVISORS LLC pharmaceutical preparations | 192.7K | 2.64% | 2.64% | $751.53M | Nov 14, 2025 | — held |
ACADIAN ASSET MANAGEMENT LLC pharmaceutical preparations | 133.5K | 1.83% | 1.83% | $519.00M | Nov 13, 2025 | — held |
PEAPOD LANE CAPITAL LLC pharmaceutical preparations | 125.8K | 1.72% | 1.72% | $490.54M | Nov 10, 2025 | ▲ 10.7K |
ADAR1 CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 125.0K | 1.71% | 1.71% | $487.37M | Nov 14, 2025 | ▼ 22.4K |
RENAISSANCE TECHNOLOGIES LLC pharmaceutical preparations | 115.9K | 1.59% | 1.59% | $451.95M | Nov 13, 2025 | ▲ 28.6K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
9
Increased
+340.4K shares4
New Positions
first time holders8
Decreased
−53.7K shares3
Sold Out
fully exitedNet shares change (top 50)
+286.8K
+340.4K / −53.7K
Net new holders
+2
4 new / 3 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
KZR insider trading · insider activity
Source: SEC Form 4
0
Buy transactions
59
Sell transactions
0.00
Buy/Sell ratio
$1M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Wallace Courtney director | May 11, 2026 | D-Return | 3,500 | $26.40 | $92.4K | 0 | Form 4 ↗ |
Wallace Courtney director | May 11, 2026 | D-Return | 5,000 | $6.70 | $33.5K | 0 | Form 4 ↗ |
Wallace Courtney director | May 11, 2026 | D-Return | 5,000 | $4.46 | $22.3K | 0 | Form 4 ↗ |
Wallace Courtney director | May 11, 2026 | D-Return | 2,600 | $22.80 | $59.3K | 0 | Form 4 ↗ |
Schiller Mark C. Chief Operating Officer | May 11, 2026 | U-Tender | 2,739 | $6.96 | $19.0K | 0 | Form 4 ↗ |
Schiller Mark C. Chief Operating Officer | May 11, 2026 | D-Return | 25,000 | $9.30 | $232.5K | 0 | Form 4 ↗ |
Schiller Mark C. Chief Operating Officer | May 11, 2026 | D-Return | 24,500 | $6.58 | $161.2K | 0 | Form 4 ↗ |
Schiller Mark C. Chief Operating Officer | May 11, 2026 | D-Return | 12,000 | $6.30 | $75.6K | 0 | Form 4 ↗ |
Schiller Mark C. Chief Operating Officer | May 11, 2026 | D-Return | 16,499 | $22.80 | $376.2K | 0 | Form 4 ↗ |
Klearman Micki director | May 11, 2026 | D-Return | 3,500 | $26.40 | $92.4K | 0 | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Kezar Life Sciences, Inc. (KZR) is primarily owned by institutional investors, who hold approximately 57.4% of total shares outstanding. Company insiders own approximately 17.37%, while retail and public investors account for the remaining 25.24%.
The largest institutional shareholder of Kezar Life Sciences, Inc. is BML CAPITAL MANAGEMENT, LLC, holding approximately 720,787 shares — equal to 9.86% of outstanding shares — as of September 30, 2025.
A total of 40 institutional investors currently hold KZR stock, with a combined institutional value of approximately $16,532,841 as of the most recent 13F filing period.
Frequently asked questions
KZR ownershipKezar Life Sciences, Inc. (KZR) is primarily owned by institutional investors, who hold approximately 57.4% of shares. The largest shareholder is BML CAPITAL MANAGEMENT, LLC with a 9.86% stake. Company insiders hold 17.37%. Data sourced from SEC Form 13F as of September 30, 2025.