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 | |
|---|---|---|---|---|---|---|
2101
PUT
Asana
ASAN
$1.58B
| $2.76M | ﹤0.01% |
178,300
-59,800
| -25% | -$1.07M |
|
|
CHGX
2102
PUT
DELISTED
AXS Change Finance ESG ETF
CHGX
| $2.76M | ﹤0.01% |
100,400
+29,300
| +41% | +$1.02M |
|
2103
PUT
Liberty Global Class C
LBTYK
$3.27B
| $2.75M | ﹤0.01% |
162,400
+157,000
| +2,907% | +$3.02M |
|
2104
PUT
Kodiak Gas Services
KGS
$5.96B
| $2.75M | ﹤0.01% |
+100,600
| New | +$2.43M |
|
2105
Etsy
ETSY
$7.65B
| $2.75M | ﹤0.01% |
+40,014
| New | +$2.87M |
|
2106
CALL
Viatris
VTRS
$20.1B
| $2.75M | ﹤0.01% |
229,900
+75,900
| +49% | +$914K |
|
2107
CALL
Voya Financial
VOYA
$8.94B
| $2.74M | ﹤0.01% |
37,100
+26,100
| +237% | +$1.84M |
|
2108
CALL
Carter's
CRI
$1.43B
| $2.73M | ﹤0.01% |
32,300
+21,200
| +191% | +$1.68M |
|
2109
CALL
East-West Bancorp
EWBC
$17.9B
| $2.73M | ﹤0.01% |
34,500
+8,800
| +34% | +$644K |
|
2110
CALL
Matsons
MATX
$6.37B
| $2.72M | ﹤0.01% |
24,200
+21,300
| +734% | +$2.4M |
|
|
DQ
2111
CALL
Daqo New Energy
DQ
$790M
| $2.72M | ﹤0.01% |
96,600
+7,800
| +9% | +$174K |
|
2112
PUT
Gold Fields
GFI
$29.2B
| $2.71M | ﹤0.01% |
170,900
+92,500
| +118% | +$1.29M |
|
2113
CALL
H&R Block
HRB
$5.18B
| $2.71M | ﹤0.01% |
55,300
+32,900
| +147% | +$1.56M |
|
|
SPR
2114
DELISTED
Spirit AeroSystems
SPR
| $2.71M | ﹤0.01% |
+75,017
| New | +$2.27M |
|
2115
State Street Communication Services Select Sector SPDR ETF
XLC
$21.9B
| $2.71M | ﹤0.01% |
+33,132
| New | +$2.58M |
|
|
EXE
2116
Expand Energy Corp
EXE
$21.9B
| $2.71M | ﹤0.01% |
+30,456
| New | +$2.45M |
|
2117
Wynn Resorts
WYNN
$10.1B
| $2.7M | ﹤0.01% |
+26,415
| New | +$2.62M |
|
2118
PUT
Galicia Financial Group
GGAL
$7.92B
| $2.69M | ﹤0.01% |
105,700
+13,300
| +14% | +$276K |
|
2119
CALL
Legend Biotech
LEGN
$4.3B
| $2.69M | ﹤0.01% |
47,900
-3,000
| -6% | -$181K |
|
|
FLG
2120
Flagstar Bank National Association
FLG
$5.77B
| $2.69M | ﹤0.01% |
+278,074
| New | +$5.14M |
|
2121
XPO
XPO
$25B
| $2.68M | ﹤0.01% |
+21,996
| New | +$2.35M |
|
2122
CALL
Corpay
CPAY
$24.2B
| $2.68M | ﹤0.01% |
8,700
-9,200
| -51% | -$2.64M |
|
2123
PUT
Astera Labs
ALAB
$50B
| $2.68M | ﹤0.01% |
+36,100
| New | +$2.67M |
|
|
VSTO
2124
CALL
DELISTED
Vista Outdoor Inc.
VSTO
| $2.68M | ﹤0.01% |
81,700
-24,600
| -23% | -$746K |
|
|
TEN
2125
PUT
Tsakos Energy Navigation Ltd
TEN
$1.19B
| $2.68M | ﹤0.01% |
105,400
+46,500
| +79% | +$1.13M |
|
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.