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 | |
|---|---|---|---|---|---|---|
|
GTLS
3001
CALL
DELISTED
Chart Industries
GTLS
| $923K | ﹤0.01% |
6,400
-7,000
| -52% | -$1.06M |
|
3002
PUT
Xylem
XYL
$28.7B
| $922K | ﹤0.01% |
6,800
+3,600
| +113% | +$490K |
|
3003
CALL
DTE Energy
DTE
$30.7B
| $921K | ﹤0.01% |
8,300
-100
| -1% | -$11.2K |
|
3004
PUT
Martin Marietta Materials
MLM
$34.4B
| $921K | ﹤0.01% |
1,700
-2,800
| -62% | -$1.63M |
|
3005
CALL
TPG
TPG
$6.9B
| $920K | ﹤0.01% |
22,200
+13,800
| +164% | +$590K |
|
3006
CALL
Bausch Health
BHC
$1.68B
| $919K | ﹤0.01% |
131,900
-133,700
| -50% | -$1.01M |
|
3007
iShares JPMorgan USD Emerging Markets Bond ETF
EMB
$15B
| $919K | ﹤0.01% |
+10,388
| New | +$921K |
|
3008
CALL
Applied Optoelectronics
AAOI
$7.84B
| $918K | ﹤0.01% |
110,800
+12,100
| +12% | +$133K |
|
3009
PUT
Arrowhead Research
ARWR
$12.2B
| $917K | ﹤0.01% |
35,300
+15,800
| +81% | +$388K |
|
|
BORR
3010
PUT
Borr Drilling
BORR
$1.27B
| $915K | ﹤0.01% |
141,900
+35,700
| +34% | +$215K |
|
3011
CALL
Crescent Energy
CRGY
$3.46B
| $914K | ﹤0.01% |
77,200
+23,100
| +43% | +$272K |
|
|
NARI
3012
CALL
DELISTED
Inari Medical, Inc. Common Stock
NARI
| $914K | ﹤0.01% |
19,000
+7,500
| +65% | +$332K |
|
|
PPLC
3013
CALL
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $914K | ﹤0.01% |
19,800
-33,200
| -63% | -$1.53M |
|
3014
PUT
LegalZoom.com
LZ
$1.31B
| $913K | ﹤0.01% |
108,900
+64,100
| +143% | +$660K |
|
3015
PUT
Compass
COMP
$8.82B
| $912K | ﹤0.01% |
253,500
+26,300
| +12% | +$96.4K |
|
3016
Intellia Therapeutics
NTLA
$1.52B
| $912K | ﹤0.01% |
40,788
-23,885
| -37% | -$569K |
|
3017
CALL
Torrid Holdings
CURV
$253M
| $909K | ﹤0.01% |
121,400
+95,200
| +363% | +$546K |
|
3018
CALL
Entergy
ETR
$53.3B
| $909K | ﹤0.01% |
17,000
-6,600
| -28% | -$356K |
|
3019
Interactive Brokers
IBKR
$40.9B
| $909K | ﹤0.01% |
29,668
-40,760
| -58% | -$1.22M |
|
|
AIOT
3020
PowerFleet Inc
AIOT
$514M
| $909K | ﹤0.01% |
199,005
+70,157
| +54% | +$333K |
|
3021
PUT
Invesco CurrencyShares Japanese Yen Trust
FXY
$426M
| $908K | ﹤0.01% |
15,800
-56,900
| -78% | -$3.38M |
|
3022
PUT
Hawaiian Electric Industries
HE
$2.28B
| $907K | ﹤0.01% |
100,600
-32,000
| -24% | -$333K |
|
3023
CALL
Murphy Oil
MUR
$5.38B
| $907K | ﹤0.01% |
22,000
+14,300
| +186% | +$623K |
|
3024
Edison International
EIX
$30.3B
| $906K | ﹤0.01% |
12,620
-3,361
| -21% | -$244K |
|
|
HA
3025
PUT
DELISTED
Hawaiian Holdings, Inc.
HA
| $906K | ﹤0.01% |
72,900
+59,300
| +436% | +$775K |
|
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.