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 | |
|---|---|---|---|---|---|---|
776
PUT
Teva Pharmaceuticals
TEVA
$36.3B
| $17.7M | 0.01% |
1,256,600
+148,300
| +13% | +$1.87M |
|
777
CALL
Automatic Data Processing
ADP
$97.1B
| $17.7M | 0.01% |
70,700
-28,600
| -29% | -$6.99M |
|
778
CALL
Transocean
RIG
$5.89B
| $17.6M | 0.01% |
2,809,900
-498,000
| -15% | -$2.72M |
|
779
CALL
Synchrony
SYF
$23.3B
| $17.6M | 0.01% |
408,800
-355,200
| -46% | -$14.1M |
|
780
PUT
Planet Fitness
PLNT
$4.29B
| $17.5M | 0.01% |
279,400
+174,500
| +166% | +$11.7M |
|
781
CALL
Chubb
CB
$137B
| $17.5M | 0.01% |
67,500
+15,800
| +31% | +$3.88M |
|
782
CALL
Edwards Lifesciences
EW
$48.3B
| $17.5M | 0.01% |
183,000
-86,300
| -32% | -$7.25M |
|
783
PUT
Nutrien
NTR
$32.9B
| $17.5M | 0.01% |
321,800
+142,000
| +79% | +$7.4M |
|
784
CALL
Electronic Arts
EA
$52.4B
| $17.5M | 0.01% |
131,700
-48,600
| -27% | -$6.67M |
|
|
785
PUT
Electronic Arts
EA
$52.4B
| $17.5M | 0.01% |
131,600
+20,300
| +18% | +$2.79M |
|
786
PUT
KB Home
KBH
$3.41B
| $17.4M | 0.01% |
246,200
-39,700
| -14% | -$2.53M |
|
787
CALL
J.M. Smucker
SJM
$12.4B
| $17.4M | 0.01% |
138,200
+46,300
| +50% | +$5.86M |
|
788
CALL
Tractor Supply
TSCO
$15.9B
| $17.3M | 0.01% |
331,000
+80,500
| +32% | +$3.85M |
|
789
PUT
Cadence Design Systems
CDNS
$91.1B
| $17.3M | 0.01% |
55,600
-14,600
| -21% | -$4.32M |
|
790
CALL
SolarEdge
SEDG
$2.75B
| $17.3M | 0.01% |
243,800
-57,900
| -19% | -$4.18M |
|
791
PUT
Allstate
ALL
$65.5B
| $17.3M | 0.01% |
100,000
-61,600
| -38% | -$9.72M |
|
792
CALL
Cardinal Health
CAH
$52.9B
| $17.3M | 0.01% |
154,300
+35,100
| +29% | +$3.79M |
|
|
793
Alphabet (Google) Class A
GOOGL
$3.88T
| $17.2M | 0.01% |
114,255
-725,434
| -86% | -$104M |
|
794
CALL
Sysco
SYY
$39.1B
| $17.2M | 0.01% |
211,600
-77,000
| -27% | -$6.07M |
|
|
FL
795
CALL
DELISTED
Foot Locker
FL
| $17.2M | 0.01% |
602,400
+248,100
| +70% | +$7.13M |
|
|
WCC
796
CALL
WESCO International
WCC
$16.1B
| $17.1M | 0.01% |
100,000
+39,000
| +64% | +$6.44M |
|
797
Snowflake
SNOW
$91.9B
| $17.1M | 0.01% |
+105,930
| New | +$20.5M |
|
798
CALL
Warner Bros
WBD
$65.1B
| $17M | 0.01% |
1,952,900
+77,200
| +4% | +$744K |
|
|
EXAS
799
CALL
DELISTED
Exact Sciences
EXAS
| $17M | 0.01% |
246,200
+103,000
| +72% | +$6.52M |
|
800
PUT
GitLab
GTLB
$5.1B
| $17M | 0.01% |
290,800
+108,300
| +59% | +$7.1M |
|
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.