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 | |
|---|---|---|---|---|---|---|
3301
WD-40
WDFC
$3.13B
| $694K | ﹤0.01% |
3,160
+726
| +30% | +$168K |
|
3302
PUT
Watsco Inc
WSO
$15B
| $694K | ﹤0.01% |
1,500
-100
| -6% | -$45.7K |
|
3303
Axsome Therapeutics
AXSM
$12.3B
| $693K | ﹤0.01% |
8,620
-6,766
| -44% | -$501K |
|
|
BLD
3304
CALL
DELISTED
TopBuild
BLD
| $693K | ﹤0.01% |
1,800
-3,100
| -63% | -$1.26M |
|
|
BZUN
3305
CALL
Baozun
BZUN
$164M
| $693K | ﹤0.01% |
296,400
+45,400
| +18% | +$117K |
|
3306
Crane Co
CR
$13.1B
| $693K | ﹤0.01% |
+4,784
| New | +$678K |
|
3307
PUT
Kinsale Capital Group
KNSL
$8.24B
| $693K | ﹤0.01% |
1,800
+500
| +38% | +$203K |
|
3308
Array Technologies
ARRY
$848M
| $692K | ﹤0.01% |
+67,507
| New | +$857K |
|
3309
Silicon Motion
SIMO
$8.29B
| $692K | ﹤0.01% |
8,546
+5,226
| +157% | +$408K |
|
3310
PUT
Transmedics
TMDX
$2.57B
| $692K | ﹤0.01% |
4,600
-11,900
| -72% | -$1.43M |
|
3311
CALL
Viridian Therapeutics
VRDN
$2.18B
| $692K | ﹤0.01% |
53,200
+52,300
| +5,811% | +$724K |
|
3312
CALL
WEX
WEX
$6.17B
| $690K | ﹤0.01% |
3,900
+400
| +11% | +$81.6K |
|
3313
PUT
FLEX LNG
FLNG
$1.65B
| $689K | ﹤0.01% |
25,500
-4,000
| -14% | -$109K |
|
3314
CALL
Fresenius Medical Care
FMS
$13.4B
| $689K | ﹤0.01% |
36,100
+1,400
| +4% | +$28.5K |
|
|
LAC
3315
PUT
Lithium Americas
LAC
$1.02B
| $689K | ﹤0.01% |
145,400
+69,500
| +92% | +$307K |
|
3316
CALL
RPM International
RPM
$13.8B
| $689K | ﹤0.01% |
6,400
-10,900
| -63% | -$1.21M |
|
3317
PUT
Carlisle Companies
CSL
$13.8B
| $688K | ﹤0.01% |
1,700
+500
| +42% | +$201K |
|
3318
Amplify Cybersecurity ETF
HACK
$2.65B
| $688K | ﹤0.01% |
10,638
-27,113
| -72% | -$1.68M |
|
3319
BioMarin Pharmaceuticals
BMRN
$11.6B
| $687K | ﹤0.01% |
8,351
-9,287
| -53% | -$773K |
|
|
TUZ
3320
PUT
DELISTED
PIMCO 1-3 Year U.S. Treasury Index Exchange-Traded Fund
TUZ
| $687K | ﹤0.01% |
10,400
-30,600
| -75% | -$2.02M |
|
3321
CALL
Perion Network
PERI
$371M
| $686K | ﹤0.01% |
82,200
+21,600
| +36% | +$262K |
|
3322
CALL
Douglas Emmett
DEI
$2.03B
| $685K | ﹤0.01% |
51,500
+51,000
| +10,200% | +$692K |
|
3323
CALL
Universal Health Services
UHS
$9.64B
| $684K | ﹤0.01% |
3,700
-5,500
| -60% | -$973K |
|
|
PPLC
3324
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $684K | ﹤0.01% |
8,700
-7,300
| -46% | -$574K |
|
3325
CALL
Ameriprise Financial
AMP
$47.6B
| $683K | ﹤0.01% |
1,600
-6,800
| -81% | -$2.9M |
|
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.