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 | |
|---|---|---|---|---|---|---|
701
CALL
AB InBev
BUD
$155B
| $19.8M | 0.01% |
326,000
-11,500
| -3% | -$720K |
|
702
Albemarle
ALB
$13.8B
| $19.8M | 0.01% |
150,150
+92,218
| +159% | +$11.4M |
|
703
PUT
Monolithic Power Systems
MPWR
$68.6B
| $19.6M | 0.01% |
29,000
+10,900
| +60% | +$7.28M |
|
704
PUT
UiPath
PATH
$5.28B
| $19.6M | 0.01% |
866,000
+378,400
| +78% | +$8.86M |
|
705
CALL
Aon
AON
$76B
| $19.6M | 0.01% |
58,700
+27,800
| +90% | +$8.62M |
|
706
CALL
Akamai
AKAM
$17.1B
| $19.6M | 0.01% |
179,800
-35,500
| -16% | -$4.09M |
|
707
PUT
Crown Castle
CCI
$32.5B
| $19.5M | 0.01% |
184,600
-72,300
| -28% | -$7.86M |
|
708
CALL
Five Below
FIVE
$11.1B
| $19.5M | 0.01% |
107,400
+31,900
| +42% | +$6.15M |
|
709
CALL
Caesars Entertainment
CZR
$6.09B
| $19.5M | 0.01% |
445,300
-98,600
| -18% | -$4.26M |
|
710
CALL
AstraZeneca
AZN
$261B
| $19.5M | 0.01% |
143,650
-21,850
| -13% | -$2.89M |
|
711
CALL
Hewlett Packard
HPE
$63.1B
| $19.5M | 0.01% |
1,097,400
+307,600
| +39% | +$5M |
|
|
SCIU
712
CALL
DELISTED
Global X Scientific Beta US ETF
SCIU
| $19.4M | 0.01% |
727,100
-199,800
| -22% | -$5.33M |
|
713
CALL
Arbor Realty Trust
ABR
$966M
| $19.4M | 0.01% |
1,462,600
+436,100
| +42% | +$5.85M |
|
|
EXAS
714
PUT
DELISTED
Exact Sciences
EXAS
| $19.4M | 0.01% |
280,200
+140,100
| +100% | +$8.86M |
|
715
PUT
HCA Healthcare
HCA
$83.5B
| $19.3M | 0.01% |
58,000
-43,200
| -43% | -$13.2M |
|
716
CALL
Align Technology
ALGN
$12B
| $19.3M | 0.01% |
58,900
-82,900
| -58% | -$24.3M |
|
717
CALL
Madrigal Pharmaceuticals
MDGL
$12.5B
| $19.3M | 0.01% |
72,200
+21,600
| +43% | +$5.09M |
|
718
State Street SPDR S&P 500 ETF Trust
SPY
$777B
| $19.3M | 0.01% |
+36,861
| New | +$18.4M |
|
719
PUT
Warner Bros
WBD
$65.1B
| $19.2M | 0.01% |
2,204,600
+264,600
| +14% | +$2.55M |
|
|
720
Walt Disney
DIS
$161B
| $19.2M | 0.01% |
157,252
-655,732
| -81% | -$68.5M |
|
721
PUT
Macy's
M
$6.14B
| $19.2M | 0.01% |
962,500
-346,600
| -26% | -$6.7M |
|
722
CALL
Allstate
ALL
$65.5B
| $19.2M | 0.01% |
111,200
+60,100
| +118% | +$9.49M |
|
723
CALL
Corning
GLW
$134B
| $19.2M | 0.01% |
582,700
-8,200
| -1% | -$261K |
|
|
HES
724
PUT
DELISTED
Hess
HES
| $19.2M | 0.01% |
125,700
-105,600
| -46% | -$15.3M |
|
725
PUT
Air Products & Chemicals
APD
$65.5B
| $19.2M | 0.01% |
79,100
-21,800
| -22% | -$5.34M |
|
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.