Institutional Manager · CIK 0001569537
BEACONLIGHT CAPITAL, LLC
New York, NY · File #028-15209
Latest AUM
$171.2M
Positions
23
Top-10 Concentration
70.0%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| REDUCE | SANDISK CORP | SNDK | -42,936 | -$10.2M | +$9.4M |
| NEW | CARPENTER TECHNOLOGY CORP | CRS | +25,445 | +$8.0M | $0 |
| EXITED | STMICROELECTRONICS N V | 861012102 | -261,232 | -$7.4M | $0 |
| EXITED | FULL TRUCK ALLIANCE CO LTD | 35969L108 | -458,277 | -$5.9M | $0 |
| REDUCE | ADVANCE AUTO PARTS INC | AAP | -124,431 | -$4.9M | -$3.0M |
| REDUCE | CHENIERE ENERGY INC | LNG | -24,304 | -$4.7M | -$2.4M |
| EXITED | CANADIAN PACIFIC KANSAS CITY | 13646K108 | -56,656 | -$4.2M | $0 |
| EXITED | MASTERBRAND INC | 57638P104 | -292,959 | -$3.9M | $0 |
| EXITED | ALIBABA GROUP HLDG LTD | 01609W102 | -21,489 | -$3.8M | $0 |
| EXITED | TOLL BROTHERS INC | 889478103 | -27,562 | -$3.8M | $0 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 202523 pos · $171.2M
- 13F HOLDINGS REPORTQ/E Sep 202528 pos · $202.7M
- 13F HOLDINGS REPORTQ/E Jun 202530 pos · $175.2M
- 13F HOLDINGS REPORTQ/E Mar 202524 pos · $149.3M
- 13F HOLDINGS REPORTQ/E Dec 202430 pos · $269.7M
- 13F HOLDINGS REPORTQ/E Sep 202428 pos · $245.7M
- 13F HOLDINGS REPORTQ/E Jun 202431 pos · $222.9M
- 13F HOLDINGS REPORTQ/E Mar 202434 pos · $250.7M
- 13F HOLDINGS REPORTQ/E Dec 202331 pos · $231.3M
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | CONSTELLIUM SE | CSTM | 1,339,934 | $25.3M | 14.75% |
| 2 | RESIDEO TECHNOLOGIES INC | REZI | 693,311 | $24.3M | 14.22% |
| 3 | SENSIENT TECHNOLOGIES CORP | SXT | 138,033 | $13.0M | 7.57% |
| 4 | GULFPORT ENERGY CORP | GPOR | 46,572 | $9.7M | 5.66% |
| 5 | TECK RESOURCES LTD | TCKRF | 191,235 | $9.2M | 5.35% |
| 6 | SOMNIGROUP INTERNATIONAL INC | SGI | 94,357 | $8.4M | 4.92% |
| 7 | CARPENTER TECHNOLOGY CORP | CRS | 25,445 | $8.0M | 4.68% |
| 8 | SANDISK CORP | SNDK | 31,864 | $7.6M | 4.42% |
| 9 | UNITY SOFTWARE INC | U | 170,521 | $7.5M | 4.40% |
| 10 | CHENIERE ENERGY INC | LNG | 35,835 | $7.0M | 4.07% |
| 11 | QUIDELORTHO CORP | QDEL | 239,049 | $6.8M | 3.99% |
| 12 | TWILIO INC | TWLO | 46,060 | $6.6M | 3.83% |
| 13 | SNOWFLAKE INC | SNOW | 27,675 | $6.1M | 3.55% |
| 14 | NATERA INC | NTRA | 23,286 | $5.3M | 3.12% |
| 15 | EQT CORP | EQT | 92,889 | $5.0M | 2.91% |
| 16 | GDS HLDGS LTD | GDHLF | 136,043 | $4.7M | 2.77% |
| 17 | TRANSMEDICS GROUP INC | TMDX | 29,344 | $3.6M | 2.08% |
| 18 | SEAGATE TECHNOLOGY HLDNGS PL | SE | 12,651 | $3.5M | 2.03% |
| 19 | VICOR CORP | VICR | 29,257 | $3.2M | 1.87% |
| 20 | DIGIMARC CORP NEW | DMRC | 431,772 | $2.8M | 1.65% |