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 | |
|---|---|---|---|---|---|---|
2126
CALL
Arcosa
ACA
$7.12B
| $2.67M | ﹤0.01% |
+31,100
| New | +$2.53M |
|
2127
PUT
Icahn Enterprises
IEP
$5.17B
| $2.67M | ﹤0.01% |
156,700
+800
| +0.5% | +$14.7K |
|
2128
CALL
Halozyme
HALO
$9.72B
| $2.66M | ﹤0.01% |
65,300
+3,700
| +6% | +$139K |
|
2129
PUT
Blue Owl Capital
OWL
$6.39B
| $2.65M | ﹤0.01% |
140,800
+52,800
| +60% | +$885K |
|
2130
PUT
RenaissanceRe
RNR
$13.7B
| $2.65M | ﹤0.01% |
11,300
+7,000
| +163% | +$1.55M |
|
2131
Moderna
MRNA
$21.5B
| $2.65M | ﹤0.01% |
+24,885
| New | +$2.51M |
|
2132
CALL
Talos Energy
TALO
$2.49B
| $2.65M | ﹤0.01% |
190,300
+175,000
| +1,144% | +$2.28M |
|
2133
iShares MSCI ACWI ETF
ACWI
$32.6B
| $2.64M | ﹤0.01% |
24,011
+23,025
| +2,335% | +$2.42M |
|
2134
CALL
Installed Building Products
IBP
$6.13B
| $2.64M | ﹤0.01% |
10,200
+9,700
| +1,940% | +$2.08M |
|
2135
CALL
Range Resources
RRC
$9.11B
| $2.64M | ﹤0.01% |
76,600
-75,800
| -50% | -$2.34M |
|
2136
PUT
Lumen
LUMN
$6.53B
| $2.63M | ﹤0.01% |
1,689,400
+788,600
| +88% | +$1.23M |
|
|
GTM
2137
ZoomInfo Technologies
GTM
$861M
| $2.63M | ﹤0.01% |
164,383
+61,135
| +59% | +$995K |
|
2138
PUT
Global Ship Lease
GSL
$1.57B
| $2.63M | ﹤0.01% |
129,800
+21,200
| +20% | +$432K |
|
2139
Affirm
AFRM
$23.5B
| $2.63M | ﹤0.01% |
+70,561
| New | +$2.82M |
|
2140
PUT
Hormel Foods
HRL
$13.9B
| $2.63M | ﹤0.01% |
75,300
+9,000
| +14% | +$287K |
|
|
MDRX
2141
DELISTED
Veradigm Inc. Common Stock
MDRX
| $2.63M | ﹤0.01% |
341,139
+330,836
| +3,211% | +$3.01M |
|
2142
PUT
Equifax
EFX
$20.3B
| $2.62M | ﹤0.01% |
9,800
-11,700
| -54% | -$2.98M |
|
2143
CALL
Advanced Drainage Systems
WMS
$10.9B
| $2.62M | ﹤0.01% |
15,200
+6,100
| +67% | +$918K |
|
2144
PUT
Ambarella
AMBA
$2.99B
| $2.61M | ﹤0.01% |
51,500
-55,700
| -52% | -$3.04M |
|
|
FYBR
2145
CALL
DELISTED
Frontier Communications
FYBR
| $2.61M | ﹤0.01% |
106,500
-209,200
| -66% | -$4.95M |
|
2146
PUT
Paychex
PAYX
$40.4B
| $2.6M | ﹤0.01% |
21,200
-50,300
| -70% | -$6.1M |
|
2147
CALL
New York Times
NYT
$11.6B
| $2.6M | ﹤0.01% |
60,100
+48,600
| +423% | +$2.21M |
|
2148
CALL
RingCentral
RNG
$4.05B
| $2.6M | ﹤0.01% |
74,700
-102,000
| -58% | -$3.43M |
|
2149
PUT
Regal Rexnord
RRX
$14.2B
| $2.59M | ﹤0.01% |
14,400
-4,200
| -23% | -$654K |
|
2150
iShares US Home Construction ETF
ITB
$2.41B
| $2.59M | ﹤0.01% |
22,395
+6,040
| +37% | +$633K |
|
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.