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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4726
PUT
Tenaris
TS
$28.2B
| $186K | ﹤0.01% |
6,100
-2,500
| -29% | -$86.6K |
|
4727
PUT
Vir Biotechnology
VIR
$1.46B
| $186K | ﹤0.01% |
20,900
+8,900
| +74% | +$85.3K |
|
|
CTLP
4728
DELISTED
Cantaloupe
CTLP
| $185K | ﹤0.01% |
28,085
+7,436
| +36% | +$48.2K |
|
4729
PUT
Delek US
DK
$3.98B
| $185K | ﹤0.01% |
7,500
+3,800
| +103% | +$105K |
|
4730
iShares S&P GSCI Commodity-Indexed Trust
GSG
$1B
| $185K | ﹤0.01% |
8,396
+2,175
| +35% | +$48.4K |
|
|
IAS
4731
DELISTED
Integral Ad Science
IAS
| $185K | ﹤0.01% |
19,075
+8,481
| +80% | +$81.2K |
|
4732
PUT
Pampa Energía
PAM
$4.57B
| $185K | ﹤0.01% |
4,200
+2,700
| +180% | +$123K |
|
4733
CALL
Synaptics
SYNA
$4.05B
| $185K | ﹤0.01% |
2,100
-43,900
| -95% | -$3.98M |
|
4734
CALL
Trinity Industries
TRN
$2.92B
| $185K | ﹤0.01% |
6,200
+800
| +15% | +$23.3K |
|
|
ACCD
4735
DELISTED
Accolade Inc
ACCD
| $185K | ﹤0.01% |
51,772
+27,695
| +115% | +$210K |
|
4736
PUT
APi Group
APG
$16.7B
| $184K | ﹤0.01% |
7,350
+5,100
| +227% | +$128K |
|
4737
PUT
CNX Resources
CNX
$4.91B
| $184K | ﹤0.01% |
7,600
-6,500
| -46% | -$159K |
|
4738
CALL
FuelCell Energy
FCEL
$1.45B
| $184K | ﹤0.01% |
9,630
-5,560
| -37% | -$149K |
|
4739
PUT
MoonLake Immunotherapeutics
MLTX
$1.56B
| $184K | ﹤0.01% |
4,200
-11,500
| -73% | -$487K |
|
|
TBCH
4740
Turtle Beach Corp
TBCH
$238M
| $184K | ﹤0.01% |
12,865
-35,845
| -74% | -$557K |
|
4741
CALL
Holley
HLLY
$335M
| $183K | ﹤0.01% |
51,200
+900
| +2% | +$3.51K |
|
4742
CALL
MDU Resources
MDU
$4.18B
| $183K | ﹤0.01% |
13,177
-78,517
| -86% | -$1.08M |
|
4743
PUT
nVent Electric
NVT
$21.6B
| $183K | ﹤0.01% |
2,400
-98,200
| -98% | -$7.62M |
|
4744
CALL
Pulse Biosciences
PLSE
$2.37B
| $183K | ﹤0.01% |
16,400
-14,800
| -47% | -$139K |
|
4745
CALL
Ternium
TX
$9.43B
| $183K | ﹤0.01% |
4,900
-9,200
| -65% | -$380K |
|
|
WOW
4746
PUT
DELISTED
WideOpenWest
WOW
| $183K | ﹤0.01% |
+33,900
| New | +$150K |
|
|
JOYY
4747
CALL
JOYY Inc
JOYY
$3.73B
| $183K | ﹤0.01% |
6,100
-2,800
| -31% | -$89.4K |
|
4748
CALL
Adeia
ADEA
$2.55B
| $182K | ﹤0.01% |
16,300
-7,700
| -32% | -$84K |
|
4749
CALL
Cohu
COHU
$1.86B
| $182K | ﹤0.01% |
5,500
+5,000
| +1,000% | +$155K |
|
4750
PUT
Globalstar
GSAT
$10.1B
| $182K | ﹤0.01% |
10,847
+1,020
| +10% | +$18.4K |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.