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 | |
|---|---|---|---|---|---|---|
1101
CALL
Trip.com Group
TCOM
$27.5B
| $10.3M | 0.01% |
235,800
-58,300
| -20% | -$2.37M |
|
1102
PUT
Evergy
EVRG
$20.1B
| $10.3M | 0.01% |
193,600
+187,400
| +3,023% | +$9.58M |
|
1103
PUT
Samsara
IOT
$19.2B
| $10.3M | 0.01% |
273,300
-2,900
| -1% | -$98.7K |
|
1104
PUT
First Citizens BancShares
FCNCA
$24.6B
| $10.3M | 0.01% |
6,300
+2,900
| +85% | +$4.36M |
|
1105
CALL
Parker-Hannifin
PH
$124B
| $10.3M | 0.01% |
18,500
-2,800
| -13% | -$1.42M |
|
|
GRMN
1106
CALL
Garmin
GRMN
$46.8B
| $10.2M | 0.01% |
68,700
+46,100
| +204% | +$6.08M |
|
|
SPR
1107
CALL
DELISTED
Spirit AeroSystems
SPR
| $10.2M | 0.01% |
283,300
-46,300
| -14% | -$1.4M |
|
1108
Occidental Petroleum
OXY
$56.8B
| $10.2M | 0.01% |
157,148
-170,495
| -52% | -$10.2M |
|
1109
CALL
NetEase
NTES
$76.7B
| $10.2M | 0.01% |
98,700
-182,400
| -65% | -$18.6M |
|
1110
CALL
O'Reilly Automotive
ORLY
$72.3B
| $10.2M | 0.01% |
135,000
+21,000
| +18% | +$1.47M |
|
1111
PUT
AngloGold Ashanti
AU
$40.3B
| $10.1M | 0.01% |
456,900
+152,000
| +50% | +$2.86M |
|
1112
CALL
Dover
DOV
$27.2B
| $10.1M | 0.01% |
57,200
+39,600
| +225% | +$6.38M |
|
1113
DoorDash
DASH
$75.2B
| $10.1M | 0.01% |
+73,452
| New | +$8.65M |
|
1114
CALL
Enovix
ENVX
$855M
| $10.1M | 0.01% |
1,439,886
-308,457
| -18% | -$2.68M |
|
1115
CALL
Hormel Foods
HRL
$13.9B
| $10.1M | 0.01% |
288,900
+214,700
| +289% | +$6.85M |
|
1116
PUT
Stanley Black & Decker
SWK
$14.1B
| $10.1M | 0.01% |
102,900
+8,000
| +8% | +$737K |
|
1117
PUT
Alnylam Pharmaceuticals
ALNY
$36.2B
| $10.1M | 0.01% |
67,400
-7,600
| -10% | -$1.27M |
|
1118
CALL
Conagra Brands
CAG
$7.05B
| $10.1M | 0.01% |
339,800
-89,400
| -21% | -$2.55M |
|
1119
CALL
Elbit Systems
ESLT
$38.4B
| $10M | 0.01% |
47,800
-6,400
| -12% | -$1.33M |
|
1120
PUT
Targa Resources
TRGP
$60.5B
| $10M | 0.01% |
89,700
+80,000
| +825% | +$7.55M |
|
1121
PUT
Aon
AON
$77.3B
| $10M | 0.01% |
30,100
+11,000
| +58% | +$3.41M |
|
1122
CALL
United States Natural Gas Fund
UNG
$470M
| $10M | 0.01% |
689,400
+488,925
| +244% | +$8.9M |
|
|
MPT
1123
CALL
Medical Properties Trust
MPT
$2.91B
| $10M | 0.01% |
2,136,200
+82,700
| +4% | +$317K |
|
1124
PUT
Ball Corp
BALL
$17B
| $10M | 0.01% |
148,900
-28,800
| -16% | -$1.75M |
|
1125
General Mills
GIS
$19.2B
| $10M | 0.01% |
143,209
-726
| -0.5% | -$47.3K |
|
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.