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 | |
|---|---|---|---|---|---|---|
4251
Roundhill Generative AI & Technology ETF
CHAT
$1.6B
| $254K | ﹤0.01% |
6,301
+5,447
| +638% | +$217K |
|
4252
Remitly
RELY
$4.93B
| $254K | ﹤0.01% |
+11,269
| New | +$207K |
|
4253
CareTrust REIT
CTRE
$9.96B
| $253K | ﹤0.01% |
9,354
+9,113
| +3,781% | +$272K |
|
4254
CALL
GFL Environmental
GFL
$14.7B
| $253K | ﹤0.01% |
5,700
+2,600
| +84% | +$113K |
|
4255
CALL
V2X
VVX
$2.67B
| $253K | ﹤0.01% |
+5,300
| New | +$315K |
|
4256
CALL
Lazard
LAZ
$4.05B
| $252K | ﹤0.01% |
4,900
-2,300
| -32% | -$123K |
|
|
AZUL
4257
PUT
DELISTED
Azul
AZUL
| $251K | ﹤0.01% |
150,500
+116,200
| +339% | +$303K |
|
4258
CryoPort
CYRX
$754M
| $251K | ﹤0.01% |
32,326
+3,660
| +13% | +$27.3K |
|
4259
CALL
Gogo Inc
GOGO
$515M
| $251K | ﹤0.01% |
31,100
-99,100
| -76% | -$739K |
|
4260
CALL
Comstock
LODE
$212M
| $251K | ﹤0.01% |
31,460
+31,230
| +13,578% | +$133K |
|
4261
Mattel
MAT
$4.45B
| $251K | ﹤0.01% |
14,164
-3,571
| -20% | -$67.5K |
|
4262
CALL
Post Holdings
POST
$4.31B
| $251K | ﹤0.01% |
2,200
+1,700
| +340% | +$194K |
|
|
ABX
4263
PUT
Abacus Global Management
ABX
$1B
| $250K | ﹤0.01% |
+32,000
| New | +$274K |
|
4264
Adtran
ADTN
$679M
| $250K | ﹤0.01% |
30,121
+11,150
| +59% | +$82.3K |
|
4265
CALL
Gaotu Techedu
GOTU
$398M
| $250K | ﹤0.01% |
114,600
-47,800
| -29% | -$139K |
|
4266
CALL
Hexcel
HXL
$7.97B
| $250K | ﹤0.01% |
4,000
-41,700
| -91% | -$2.58M |
|
4267
PUT
Patria Investments
PAX
$1.75B
| $250K | ﹤0.01% |
21,500
+7,100
| +49% | +$83.9K |
|
4268
ProShares UltraPro Short S&P 500
SPXU
$427M
| $250K | ﹤0.01% |
+2,777
| New | +$252K |
|
4269
PUT
SS&C Technologies
SSNC
$19.1B
| $250K | ﹤0.01% |
3,300
-2,900
| -47% | -$217K |
|
4270
PUT
Willis Towers Watson
WTW
$30.1B
| $250K | ﹤0.01% |
800
-1,400
| -64% | -$429K |
|
4271
Element Solutions
ESI
$8.48B
| $249K | ﹤0.01% |
9,794
+5,724
| +141% | +$155K |
|
4272
PUT
Genpact
G
$6.14B
| $249K | ﹤0.01% |
5,800
-100,400
| -95% | -$4.24M |
|
4273
CALL
Gildan
GIL
$9.51B
| $249K | ﹤0.01% |
5,300
+3,700
| +231% | +$178K |
|
4274
IAMGOLD
IAG
$7.96B
| $249K | ﹤0.01% |
48,261
-23,800
| -33% | -$127K |
|
4275
PUT
LENSAR
LNSR
$65.1M
| $249K | ﹤0.01% |
27,900
+2,800
| +11% | +$18.6K |
|
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.