13D Management LLC
13F Reported Value
ⓘ$64.5M
Holdings
13
Latest Filing
2026-03-31
Filing Quarter
Q1 2026
Portfolio Overview
13D Management LLC disclosed 13 positions worth $64.5M in its Form 13F-HR for Q1 2026, led by $TWLO (TWILIO INC) at 11.8% of the equity portfolio, followed by $VSAT and $ACHC. During the quarter the fund opened 1 new position and exited 4 — including a new stake in $ACHC and a full exit from $SWX. The portfolio is most concentrated in Healthcare (30.7% of disclosed assets). All figures are sourced directly from 13D Management LLC’s Form 13F-HR filing with the SEC under CIK 1600133.
AI Fund Analysis
ConcentratingSector Allocation
AUM History
Top Equity Holdings by Value
Quarterly Activity — Q1 2026
Click any card to unlockTop Holdings
- 59.5#914
Quality
$7.6M60,755 sh - 53.3#1,290
Quality
$7.5M164,750 sh - 49.3#1,515
Quality
$6.9M294,000 sh - —
Quality
$6.0M458,338 sh - 56.9
Quality
$5.9M55,839 sh - $4.5M25,800 sh
- 42.9
Quality
$4.4M60,462 sh - 79.4
Quality
$4.3M101,335 sh - 50.2
Quality
$4.1M47,000 sh - 50.4
Quality
$3.6M71,836 sh
| Company | Quality | Value | Shares |
|---|---|---|---|
 TWILIO INC$TWLO | 59.5#914 | $7.6M | 60,755 |
 VIASAT INC$VSAT | 53.3#1,290 | $7.5M | 164,750 |
 Acadia Healthcare Company, Inc.$ACHC | 49.3#1,515 | $6.9M | 294,000 |
 PEARSON PLC$PSO | — | $6.0M | 458,338 |
 AUTOLIV INC$ALV | 56.9 | $5.9M | 55,839 |
 CHARLES RIVER LABORATORIES INTERNATIONAL, INC.$CRL | 47.1 | $4.5M | 25,800 |
 MERCURY SYSTEMS INC$MRCY | 42.9 | $4.4M | 60,462 |
 EXELIXIS, INC.$EXEL | 79.4 | $4.3M | 101,335 |
 Integer Holdings Corp$ITGR | 50.2 | $4.1M | 47,000 |
 ETSY INC$ETSY | 50.4 | $3.6M | 71,836 |
Unlock AI quality scores for every holding
32-signal composite ranking on each of 13D Management LLC's 13 positions.
Showing top 10 of 13 holdings.
Sector Allocation
Healthcare
$19.8M
Technology
$18.4M
Communication Services
$16.9M
Industrials
$9.5M
Full Holdings — 13D Management LLC (Q1 2026)
All 13 disclosed positions from the latest Form 13F-HR, with quarter-over-quarter share changes and 13F Pro quality scores. Sourced from SEC EDGAR.
| # | Ticker | Company | Value | Weight | QoQ | Quality |
|---|---|---|---|---|---|---|
| 1 | $TWLO | TWILIO INC | $7.6M | 11.8% | +0% | 59.5 |
| 2 | $VSAT | VIASAT INC | $7.5M | 11.7% | -18% | 53.3 |
| 3 | $ACHC | Acadia Healthcare Company, Inc. | $6.9M | 10.7% | NEW | 49.3 |
| 4 | $PSO | PEARSON PLC | $6.0M | 9.3% | +0% | — |
| 5 | $ALV | AUTOLIV INC | $5.9M | 9.1% | +0% | 56.9 |
| 6 | $CRL | CHARLES RIVER LABORATORIES INTERNATIONAL, INC. | $4.5M | 6.9% | -8% | 47.1 |
| 7 | $MRCY | MERCURY SYSTEMS INC | $4.4M | 6.8% | -42% | 42.9 |
| 8 | $EXEL | EXELIXIS, INC. | $4.3M | 6.7% | -16% | 79.4 |
| 9 | $ITGR | Integer Holdings Corp | $4.1M | 6.4% | +0% | 50.2 |
| 10 | $ETSY | ETSY INC | $3.6M | 5.6% | +0% | 50.4 |
| 11 |  $FUN | Six Flags Entertainment Corporation/NEW | $3.3M | 5.1% | +0% | 23.5 |
| 12 |  $TRIP | TripAdvisor, Inc. | $3.2M | 5.0% | +0% | 51.5 |
| 13 |  $WK | WORKIVA INC | $3.1M | 4.8% | +0% | 52.8 |
New Positions (1)
$ACHC Acadia Healthcare Company, Inc.$6.9M
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