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 | |
|---|---|---|---|---|---|---|
|
JWN
1051
PUT
DELISTED
Nordstrom
JWN
| $11.3M | 0.01% |
556,100
+90,000
| +19% | +$1.7M |
|
1052
PUT
Novartis
NVS
$294B
| $11.3M | 0.01% |
128,300
-194,800
| -60% | -$20M |
|
1053
CALL
L3Harris
LHX
$56.3B
| $11.3M | 0.01% |
52,800
+2,500
| +5% | +$525K |
|
1054
PUT
Academy Sports + Outdoors
ASO
$2.91B
| $11.2M | 0.01% |
166,500
-16,200
| -9% | -$1.09M |
|
1055
CALL
Vulcan Materials
VMC
$35.7B
| $11.2M | 0.01% |
41,200
+18,900
| +85% | +$4.66M |
|
|
P
1056
PUT
Everpure Inc
P
$24.3B
| $11.2M | 0.01% |
215,900
-55,300
| -20% | -$2.47M |
|
1057
Baxter International
BAX
$11.6B
| $11.2M | 0.01% |
+262,309
| New | +$10.7M |
|
1058
CALL
Zions Bancorporation
ZION
$10.1B
| $11.2M | 0.01% |
258,300
-97,700
| -27% | -$4.03M |
|
|
LSXMA
1059
PUT
DELISTED
Liberty Media Corporation Series A Liberty SiriusXM Common Stock
LSXMA
| $11.2M | 0.01% |
300,600
+181,500
| +152% | +$5.46M |
|
1060
CALL
Bank of Montreal
BMO
$124B
| $11.2M | 0.01% |
114,600
-76,600
| -40% | -$7.23M |
|
1061
CALL
Packaging Corp of America
PKG
$21.1B
| $11.2M | 0.01% |
58,900
-18,200
| -24% | -$3.16M |
|
1062
PUT
Kimberly-Clark
KMB
$36.2B
| $11.2M | 0.01% |
86,400
-12,100
| -12% | -$1.49M |
|
1063
CALL
XPeng
XPEV
$11.9B
| $11.1M | 0.01% |
1,446,500
-1,155,900
| -44% | -$11.2M |
|
1064
SolarEdge
SEDG
$2.56B
| $11.1M | 0.01% |
156,360
+2,922
| +2% | +$211K |
|
1065
PUT
Motorola Solutions
MSI
$68B
| $11.1M | 0.01% |
31,200
+4,700
| +18% | +$1.55M |
|
1066
Freeport-McMoran
FCX
$87.9B
| $11.1M | 0.01% |
235,407
+165,003
| +234% | +$6.66M |
|
1067
PUT
MPLX
MPLX
$59.4B
| $11.1M | 0.01% |
266,300
+116,400
| +78% | +$4.51M |
|
1068
CALL
Futu Holdings
FUTU
$13.9B
| $11.1M | 0.01% |
204,200
-83,700
| -29% | -$4.32M |
|
1069
CALL
Shift4
FOUR
$3.76B
| $11M | 0.01% |
166,900
-56,700
| -25% | -$4.26M |
|
1070
PUT
GameStop
GME
$9.55B
| $11M | 0.01% |
880,500
+41,900
| +5% | +$607K |
|
1071
PUT
DoubleVerify
DV
$1.61B
| $11M | 0.01% |
312,900
-33,700
| -10% | -$1.25M |
|
1072
CALL
Duolingo
DUOL
$5.63B
| $11M | 0.01% |
49,800
+10,300
| +26% | +$2.1M |
|
|
BRSL
1073
CALL
Brightstar Lottery PLC
BRSL
$1.91B
| $11M | 0.01% |
485,300
+195,000
| +67% | +$4.88M |
|
1074
PUT
Amphenol
APH
$189B
| $10.9M | 0.01% |
189,600
+134,800
| +246% | +$7.06M |
|
|
CTRA
1075
CALL
DELISTED
Coterra Energy
CTRA
| $10.8M | 0.01% |
388,100
+132,400
| +52% | +$3.4M |
|
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.