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 | |
|---|---|---|---|---|---|---|
3101
PUT
CRH
CRH
$68.7B
| $1.02M | ﹤0.01% |
11,800
-58,100
| -83% | -$4.44M |
|
3102
CALL
Masco
MAS
$16.4B
| $1.02M | ﹤0.01% |
12,900
+3,400
| +36% | +$245K |
|
3103
First Horizon
FHN
$12.1B
| $1.02M | ﹤0.01% |
66,004
+18,363
| +39% | +$264K |
|
3104
Axalta
AXTA
$7.22B
| $1.01M | ﹤0.01% |
29,531
-147,561
| -83% | -$4.82M |
|
3105
PUT
DHT Holdings
DHT
$2.95B
| $1.01M | ﹤0.01% |
88,200
+3,700
| +4% | +$40.6K |
|
3106
PUT
Photronics
PLAB
$1.76B
| $1.01M | ﹤0.01% |
35,800
+24,100
| +206% | +$717K |
|
|
CGC
3107
Canopy Growth
CGC
$390M
| $1.01M | ﹤0.01% |
117,294
+115,495
| +6,420% | +$498K |
|
3108
Celldex Therapeutics
CLDX
$2.8B
| $1.01M | ﹤0.01% |
+24,101
| New | +$990K |
|
3109
PUT
Invesco DB Base Metals Fund
DBB
$308M
| $1.01M | ﹤0.01% |
64,000
+47,400
| +286% | +$830K |
|
3110
Target
TGT
$63.7B
| $1.01M | ﹤0.01% |
+5,690
| New | +$866K |
|
|
MOR
3111
PUT
DELISTED
MorphoSys AG American Depositary Shares
MOR
| $1.01M | ﹤0.01% |
55,600
-45,000
| -45% | -$665K |
|
3112
CALL
FirstCash
FCFS
$9.06B
| $1.01M | ﹤0.01% |
7,900
-17,400
| -69% | -$2.02M |
|
3113
CALL
Brown & Brown
BRO
$23.6B
| $1.01M | ﹤0.01% |
11,500
+4,300
| +60% | +$346K |
|
|
HES
3114
DELISTED
Hess
HES
| $1M | ﹤0.01% |
+6,584
| New | +$956K |
|
3115
CubeSmart
CUBE
$9.57B
| $1M | ﹤0.01% |
+22,197
| New | +$984K |
|
3116
PUT
Corcept Therapeutics
CORT
$9.78B
| $1M | ﹤0.01% |
39,800
+31,900
| +404% | +$754K |
|
3117
CALL
Fabrinet
FN
$16.9B
| $1M | ﹤0.01% |
5,300
-6,300
| -54% | -$1.26M |
|
3118
CALL
Crane Co
CR
$13.1B
| $999K | ﹤0.01% |
7,400
+7,000
| +1,750% | +$862K |
|
3119
LivaNova
LIVN
$4.43B
| $999K | ﹤0.01% |
17,868
+17,780
| +20,205% | +$924K |
|
3120
CALL
Bally's
BALY
$686M
| $998K | ﹤0.01% |
71,600
+17,300
| +32% | +$201K |
|
|
HBI
3121
PUT
DELISTED
Hanesbrands
HBI
| $998K | ﹤0.01% |
172,100
-9,600
| -5% | -$46K |
|
3122
PUT
TransUnion
TRU
$14.9B
| $997K | ﹤0.01% |
12,500
+4,900
| +64% | +$359K |
|
3123
Comstock Resources
CRK
$3.82B
| $995K | ﹤0.01% |
107,261
+26,592
| +33% | +$219K |
|
3124
CALL
IDT Corp
IDT
$1.63B
| $994K | ﹤0.01% |
26,300
+16,000
| +155% | +$572K |
|
3125
Direxion Daily Semiconductor Bear 3X ETF
SOXS
$1.95B
| $994K | ﹤0.01% |
155
+135
| +675% | +$1.22M |
|
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.