Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1351
CALL
Burlington
BURL
$22B
| $5.99M | ﹤0.01% |
21,000
-12,700
| -38% | -$3.43M |
|
1352
PUT
Owens Corning
OC
$11.5B
| $5.98M | ﹤0.01% |
35,100
+29,700
| +550% | +$5.55M |
|
1353
PUT
Conagra Brands
CAG
$7.07B
| $5.98M | ﹤0.01% |
215,400
+87,600
| +69% | +$2.49M |
|
1354
PUT
Lumentum
LITE
$59.4B
| $5.98M | ﹤0.01% |
71,200
+47,700
| +203% | +$3.72M |
|
1355
CALL
Charles River Laboratories
CRL
$10.9B
| $5.96M | ﹤0.01% |
32,300
-8,000
| -20% | -$1.54M |
|
1356
CALL
Avis
CAR
$5.63B
| $5.95M | ﹤0.01% |
73,800
+22,500
| +44% | +$2.05M |
|
1357
PUT
MPLX
MPLX
$59.5B
| $5.95M | ﹤0.01% |
124,300
+7,000
| +6% | +$326K |
|
1358
PUT
Enovix
ENVX
$862M
| $5.94M | ﹤0.01% |
624,229
-21,600
| -3% | -$190K |
|
1359
CALL
Ovintiv
OVV
$17.7B
| $5.93M | ﹤0.01% |
146,500
+64,800
| +79% | +$2.7M |
|
1360
CALL
Blue Owl Capital
OWL
$6.39B
| $5.93M | ﹤0.01% |
255,000
+53,500
| +27% | +$1.22M |
|
1361
PUT
Virgin Galactic
SPCE
$320M
| $5.92M | ﹤0.01% |
1,007,200
+99,100
| +11% | +$660K |
|
|
HBI
1362
CALL
DELISTED
Hanesbrands
HBI
| $5.91M | ﹤0.01% |
726,500
+271,300
| +60% | +$2.14M |
|
1363
CALL
Flutter Entertainment
FLUT
$17.6B
| $5.89M | ﹤0.01% |
22,800
-30,900
| -58% | -$7.8M |
|
1364
CALL
FuelCell Energy
FCEL
$1.7B
| $5.89M | ﹤0.01% |
651,700
+629,943
| +2,895% | +$6.24M |
|
1365
CALL
Western Alliance Bancorporation
WAL
$9.07B
| $5.86M | ﹤0.01% |
70,200
-28,700
| -29% | -$2.52M |
|
|
ECHO
1366
PUT
EchoStar
ECHO
$25.5B
| $5.86M | ﹤0.01% |
256,000
+9,500
| +4% | +$230K |
|
1367
PUT
Toast
TOST
$16.8B
| $5.85M | ﹤0.01% |
160,600
-21,700
| -12% | -$763K |
|
1368
Target
TGT
$62.1B
| $5.85M | ﹤0.01% |
+43,278
| New | +$6.2M |
|
1369
CALL
RB Global
RBA
$20.8B
| $5.84M | ﹤0.01% |
64,800
+56,400
| +671% | +$5.05M |
|
1370
PUT
Texas Roadhouse
TXRH
$12.7B
| $5.84M | ﹤0.01% |
32,400
+6,700
| +26% | +$1.26M |
|
1371
CALL
Boston Properties
BXP
$11B
| $5.84M | ﹤0.01% |
78,600
-19,900
| -20% | -$1.61M |
|
1372
Hilton Worldwide
HLT
$74B
| $5.83M | ﹤0.01% |
23,597
+10,631
| +82% | +$2.6M |
|
1373
PUT
Rockwell Automation
ROK
$51.4B
| $5.83M | ﹤0.01% |
20,400
+2,000
| +11% | +$563K |
|
|
EDR
1374
CALL
DELISTED
Endeavor Group Holdings, Inc.
EDR
| $5.83M | ﹤0.01% |
186,200
-7,200
| -4% | -$214K |
|
1375
PUT
STMicroelectronics
STM
$46B
| $5.81M | ﹤0.01% |
232,600
+70,800
| +44% | +$1.88M |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.