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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1826
PUT
Danaos Corp
DAC
$2.55B
| $3.38M | ﹤0.01% |
39,000
+400
| +1% | +$33.4K |
|
1827
CALL
iQIYI
IQ
$1.18B
| $3.38M | ﹤0.01% |
1,182,100
+413,300
| +54% | +$1.2M |
|
1828
PUT
Wabtec
WAB
$51.1B
| $3.38M | ﹤0.01% |
18,600
+4,400
| +31% | +$722K |
|
1829
PUT
Helen of Troy
HELE
$663M
| $3.38M | ﹤0.01% |
54,600
-16,200
| -23% | -$958K |
|
1830
CALL
Fiverr
FVRR
$376M
| $3.37M | ﹤0.01% |
130,300
+76,100
| +140% | +$1.84M |
|
1831
Jabil
JBL
$32.8B
| $3.36M | ﹤0.01% |
28,023
-967
| -3% | -$105K |
|
1832
PUT
TG Therapeutics
TGTX
$8.58B
| $3.36M | ﹤0.01% |
143,500
-74,800
| -34% | -$1.63M |
|
1833
CALL
Canadian Pacific Kansas City
CP
$82B
| $3.35M | ﹤0.01% |
39,200
-112,700
| -74% | -$9.27M |
|
1834
ProShares UltraPro Short QQQ
SQQQ
$2.21B
| $3.35M | ﹤0.01% |
18,141
-2,667
| -13% | -$563K |
|
|
HBI
1835
CALL
DELISTED
Hanesbrands
HBI
| $3.35M | ﹤0.01% |
455,200
+116,900
| +35% | +$700K |
|
1836
PUT
Children's Place
PLCE
$53.6M
| $3.34M | ﹤0.01% |
216,000
+117,300
| +119% | +$1.04M |
|
1837
CALL
Warrior Met Coal
HCC
$4.23B
| $3.34M | ﹤0.01% |
52,300
+18,200
| +53% | +$1.13M |
|
1838
CALL
Campbell Soup
CPB
$6.51B
| $3.34M | ﹤0.01% |
68,200
-13,100
| -16% | -$638K |
|
1839
PUT
Central Garden & Pet Co Class A
CENTA
$2.41B
| $3.33M | ﹤0.01% |
+91,300
| New | +$3.04M |
|
1840
CALL
Macy's
M
$6.15B
| $3.31M | ﹤0.01% |
211,300
-345,900
| -62% | -$5.62M |
|
1841
CALL
NuScale Power
SMR
$2.8B
| $3.31M | ﹤0.01% |
286,200
-121,500
| -30% | -$1.24M |
|
1842
CALL
Viper Energy
VNOM
$8.81B
| $3.31M | ﹤0.01% |
73,300
+48,300
| +193% | +$2.12M |
|
1843
Edison International
EIX
$30.7B
| $3.3M | ﹤0.01% |
37,869
+25,249
| +200% | +$2.05M |
|
1844
CALL
Trimble
TRMB
$12.3B
| $3.29M | ﹤0.01% |
53,000
-7,600
| -13% | -$425K |
|
1845
Citizens Financial Group
CFG
$30.4B
| $3.29M | ﹤0.01% |
80,041
+2,485
| +3% | +$100K |
|
1846
CALL
Diageo
DEO
$46.2B
| $3.28M | ﹤0.01% |
23,400
-33,600
| -59% | -$4.37M |
|
1847
CALL
ADMA Biologics
ADMA
$1.92B
| $3.28M | ﹤0.01% |
164,000
-35,700
| -18% | -$555K |
|
1848
CALL
TD Synnex
SNX
$19.4B
| $3.28M | ﹤0.01% |
27,300
-60,700
| -69% | -$7.02M |
|
1849
CALL
Pitney Bowes
PBI
$2.42B
| $3.28M | ﹤0.01% |
459,700
-78,600
| -15% | -$530K |
|
1850
PUT
Casey's General Stores
CASY
$31.9B
| $3.27M | ﹤0.01% |
8,700
-11,300
| -57% | -$4.23M |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.