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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
7226
PUT
Resideo Technologies
REZI
$5.38B
| $17K | ﹤0.01% |
800
-500
| -38% | -$9.88K |
|
|
RPTX
7227
PUT
DELISTED
Repare Therapeutics
RPTX
| $17K | ﹤0.01% |
3,800
+1,200
| +46% | +$7.69K |
|
7228
SmartRent
SMRT
$195M
| $17K | ﹤0.01% |
6,387
-8,451
| -57% | -$24.4K |
|
|
VNET
7229
CALL
VNET Group
VNET
$1.8B
| $17K | ﹤0.01% |
11,000
-134,900
| -92% | -$249K |
|
7230
PUT
WaFd
WAFD
$2.72B
| $17K | ﹤0.01% |
600
+400
| +200% | +$11.5K |
|
|
ENV
7231
PUT
DELISTED
ENVESTNET, INC.
ENV
| $17K | ﹤0.01% |
300
-200
| -40% | -$10.4K |
|
7232
CALL
Advantage Solutions
ADV
$567M
| $16K | ﹤0.01% |
156
+88
| +129% | +$8.66K |
|
7233
PUT
Agilysys
AGYS
$3.17B
| $16K | ﹤0.01% |
+200
| New | +$16.2K |
|
7234
PUT
Arena Group
AREN
$53.3M
| $16K | ﹤0.01% |
14,000
+10,900
| +352% | +$16.3K |
|
7235
CALL
Anterix
ATEX
$1.76B
| $16K | ﹤0.01% |
500
-8,000
| -94% | -$269K |
|
7236
Avient
AVNT
$3.29B
| $16K | ﹤0.01% |
+371
| New | +$14.5K |
|
7237
Breakwave Dry Bulk Shipping ETF
BDRY
$28.1M
| $16K | ﹤0.01% |
1,164
-2,392
| -67% | -$30.8K |
|
7238
Global X Blockchain & Bitcoin Strategy ETF
BITS
$22.7M
| $16K | ﹤0.01% |
226
-1,022
| -82% | -$59.6K |
|
|
BPT
7239
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
| $16K | ﹤0.01% |
+6,756
| New | +$17K |
|
7240
CALL
Cato Corp
CATO
$67.1M
| $16K | ﹤0.01% |
+2,800
| New | +$18.7K |
|
7241
Compañía de Cervecerías Unidas
CCU
$2.16B
| $16K | ﹤0.01% |
1,417
+417
| +42% | +$4.99K |
|
7242
Canadian National Railway
CNI
$78.4B
| $16K | ﹤0.01% |
128
-10,688
| -99% | -$1.37M |
|
|
CNTA
7243
CALL
DELISTED
Centessa Pharmaceuticals
CNTA
| $16K | ﹤0.01% |
1,500
+1,000
| +200% | +$9.47K |
|
7244
PUT
Compass Diversified
CODI
$764M
| $16K | ﹤0.01% |
700
+200
| +40% | +$4.56K |
|
7245
CALL
Cohu
COHU
$1.89B
| $16K | ﹤0.01% |
500
-1,600
| -76% | -$52.1K |
|
7246
Corvus Pharmaceuticals
CRVS
$1.11B
| $16K | ﹤0.01% |
9,346
-40,285
| -81% | -$84.1K |
|
|
CTLP
7247
CALL
DELISTED
Cantaloupe
CTLP
| $16K | ﹤0.01% |
2,500
-14,200
| -85% | -$93.6K |
|
|
DAO
7248
CALL
Youdao
DAO
$1.92B
| $16K | ﹤0.01% |
4,100
-500
| -11% | -$1.93K |
|
7249
Emergent Biosolutions
EBS
$377M
| $16K | ﹤0.01% |
6,556
-101,520
| -94% | -$229K |
|
7250
CALL
Vertical Aerospace
EVTL
$157M
| $16K | ﹤0.01% |
1,450
-850
| -37% | -$6.04K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.