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 | |
|---|---|---|---|---|---|---|
2001
PUT
Church & Dwight Co
CHD
$23.1B
| $3.09M | ﹤0.01% |
29,600
+22,300
| +305% | +$2.23M |
|
2002
CALL
Boyd Gaming
BYD
$6.47B
| $3.08M | ﹤0.01% |
45,800
+7,900
| +21% | +$504K |
|
2003
CALL
New Oriental
EDU
$7.84B
| $3.08M | ﹤0.01% |
35,500
-32,300
| -48% | -$2.74M |
|
2004
PUT
2x Bitcoin ETF
BITX
$919M
| $3.08M | ﹤0.01% |
57,800
+41,300
| +250% | +$1.43M |
|
2005
PUT
Domo
DOMO
$166M
| $3.07M | ﹤0.01% |
344,400
+88,100
| +34% | +$916K |
|
2006
PUT
Bread Financial
BFH
$4.21B
| $3.07M | ﹤0.01% |
82,400
+25,300
| +44% | +$898K |
|
2007
Agilent Technologies
A
$39.1B
| $3.07M | ﹤0.01% |
+21,083
| New | +$2.89M |
|
2008
PUT
Valaris
VAL
$5.51B
| $3.06M | ﹤0.01% |
40,700
+21,400
| +111% | +$1.43M |
|
2009
PUT
Unum
UNM
$13.8B
| $3.06M | ﹤0.01% |
57,000
+39,100
| +218% | +$1.91M |
|
2010
PUT
Check Point Software Technologies
CHKP
$13.3B
| $3.05M | ﹤0.01% |
18,600
-66,400
| -78% | -$10.6M |
|
2011
CALL
BlackLine
BL
$1.69B
| $3.05M | ﹤0.01% |
47,200
+44,200
| +1,473% | +$2.68M |
|
2012
PUT
Ventas
VTR
$48.9B
| $3.05M | ﹤0.01% |
70,000
+15,400
| +28% | +$700K |
|
2013
CALL
W.P. Carey
WPC
$17.1B
| $3.04M | ﹤0.01% |
98,500
-69,100
| -41% | -$4.14M |
|
2014
PUT
Stride
LRN
$3.69B
| $3.04M | ﹤0.01% |
48,200
+33,300
| +223% | +$2.01M |
|
2015
PUT
Allegiant Air
ALGT
$2.64B
| $3.04M | ﹤0.01% |
40,400
+22,800
| +130% | +$1.73M |
|
2016
CALL
Labcorp
LH
$24.3B
| $3.04M | ﹤0.01% |
13,900
-3,700
| -21% | -$815K |
|
2017
PUT
EPR Properties
EPR
$4.86B
| $3.04M | ﹤0.01% |
71,500
+31,400
| +78% | +$1.37M |
|
2018
CALL
ICICI Bank
IBN
$106B
| $3.03M | ﹤0.01% |
114,900
+41,200
| +56% | +$1.03M |
|
2019
StoneCo
STNE
$2.62B
| $3.03M | ﹤0.01% |
+182,666
| New | +$3.13M |
|
2020
PUT
Cracker Barrel
CBRL
$1.2B
| $3.03M | ﹤0.01% |
41,700
-11,300
| -21% | -$819K |
|
2021
CALL
Ambarella
AMBA
$2.99B
| $3.03M | ﹤0.01% |
59,700
-43,300
| -42% | -$2.36M |
|
|
BBBY
2022
PUT
Bed Bath & Beyond
BBBY
$473M
| $3.03M | ﹤0.01% |
92,840
-157,190
| -63% | -$4.04M |
|
|
GOEV
2023
CALL
DELISTED
Canoo Inc. Class A Common Stock
GOEV
| $3.03M | ﹤0.01% |
42,450
+39,669
| +1,426% | +$2.76M |
|
2024
CALL
AdaptHealth
AHCO
$1.46B
| $3.02M | ﹤0.01% |
262,300
+257,500
| +5,365% | +$2.19M |
|
2025
CALL
Omnicom Group
OMC
$22.7B
| $3.02M | ﹤0.01% |
31,200
-35,900
| -54% | -$3.22M |
|
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.