13F Insight
DOSSIER · 13F-HR · Q1 2026

WHITEBOX ADVISORS LLC

$8.1B in tracked AUM across 568 positions as of Q1 2026.

WA
CIK 0001257391 · last filed Mar 31, 2026
Total AUM
$8.1B
as of Q1 2026
Holdings
568
—
positions
Whale Score
64
64
tracked
Activity
—
no data
changes this Q
AI Analysis · Q1 2026
Comprehensive Analysis of Whitebox Advisors LLC 13F Filing (Q3 2025)
Portfolio Overview

Whitebox Advisors LLC reported a significant expansion in its portfolio activity for the quarter ending September 30, 2025. The total portfolio value surged by 18.3%, rising from $4.71 billion to $5.57 billion. This growth was accompanied by a high turnover rate, characterized by 20 new positions and 20 complete exits, alongside substantial increases in existing core holdings. The firm manag...

Key Holdings

The portfolio is dominated by a few high-conviction names, with Western Digital Corp (WDC) standing as the singular largest holding. WDC represents 11.77% of the total portfolio ($655.61M), a position the firm aggressively increased by 26.3% (adding $365M). This suggests a strong bet on the data storage and semiconductor cycle.

The second and third largest positions are Bloom Energy Corp, which appears twice in the data (likely representing different share classes or splits), comprising a combined 12.66% of the portfolio. The firm increased these stakes by over $490M combined, indicating a major thematic play on energy transition or industrial power solutions.

Quarter at a glance — Q1 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q1 2026.

#HoldingValueSharesWeight
01
WDC 3 11/15/28
WESTERN DIGITAL CORP
$1.5B204.4M18.0%02
LITE 1.5 12/15/29
LUMENTUM HLDGS INC
$716M71.0M8.8%03
SATS 3.875 11/30/30
ECHOSTAR CORP
$365M102.2M4.5%04
SPY
STATE STR SPDR S&P 500 ETF T
$325M500K4.0%05
LITE 0.5 12/15/26
LUMENTUM HLDGS INC
$227M32.1M2.8%06
BABA 0.5 06/01/31
ALIBABA GROUP HLDG LTD
$222M159.9M2.7%07
SPHR 3.5 12/01/28
SPHERE ENTERTAINMENT CO
$217M64.5M2.7%08
IWM
ISHARES TR
$186M750K2.3%09
SNOW 0 10/01/29
SNOWFLAKE INC
$175M142.8M2.2%10
SNOW 0 10/01/27
SNOWFLAKE INC
$162M137.4M2.0%

Filing history

2026Q1Mar 31
$8.1B▲ 15.3%
568 positionsView →2025Q4Dec 31
$7.0B▲ 26.5%
492 positionsView →2025Q3Sep 30
$5.6B▲ 18.3%
370 positionsView →2025Q2Jun 30
$4.7B▲ 38.4%
382 positionsLocked2025Q1Mar 31
$3.4B▼ 1.8%
260 positionsLocked2024Q4Dec 31
$3.5B▼ 5.5%
270 positionsLocked2024Q3Sep 30
$3.7B▲ 4.9%
321 positionsLocked2024Q2Jun 30
$3.5B▼ 13.2%
349 positionsLocked2024Q1Mar 31
$4.0B▲ 10.4%
340 positionsLocked2023Q4Dec 31
$3.6B▲ 15.4%
332 positionsLocked2023Q3Sep 30
$3.2B▼ 14.2%
385 positionsLocked2023Q2Jun 30
$3.7B▲ 26.4%
438 positionsLocked
Showing 12 of 77