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 | |
|---|---|---|---|---|---|---|
5326
PUT
Azenta
AZTA
$1.33B
| $105K | ﹤0.01% |
2,000
+1,600
| +400% | +$85.5K |
|
5327
CALL
Dakota Gold
DC
$624M
| $105K | ﹤0.01% |
41,400
+25,400
| +159% | +$67.6K |
|
5328
CALL
Deluxe
DLX
$1.19B
| $105K | ﹤0.01% |
4,700
+700
| +18% | +$15K |
|
5329
PUT
Mirion Technologies
MIR
$3.7B
| $105K | ﹤0.01% |
9,800
+4,500
| +85% | +$47.8K |
|
5330
GraniteShares 2x Short NVDA Daily ETF
NVD
$62.6M
| $105K | ﹤0.01% |
1,904
+1,902
| +95,100% | +$192K |
|
|
ACRE
5331
CALL
Ares Commercial Real Estate
ACRE
$239M
| $104K | ﹤0.01% |
15,700
+9,200
| +142% | +$63.6K |
|
5332
CALL
Edgewise Therapeutics
EWTX
$4.42B
| $104K | ﹤0.01% |
5,800
+5,600
| +2,800% | +$97.7K |
|
5333
PUT
Ryanair
RYAAY
$31.2B
| $104K | ﹤0.01% |
2,250
-250
| -10% | -$13K |
|
5334
CALL
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$158M
| $104K | ﹤0.01% |
74,300
-97,500
| -57% | -$4.86M |
|
|
SIX
5335
CALL
DELISTED
Six Flags Entertainment Corp.
SIX
| $104K | ﹤0.01% |
18,000
+5,000
| +38% | +$132K |
|
5336
CALL
CONMED
CNMD
$1.41B
| $103K | ﹤0.01% |
1,500
-100
| -6% | -$7.29K |
|
5337
PUT
Columbia Banking Systems
COLB
$8.84B
| $103K | ﹤0.01% |
5,200
-2,100
| -29% | -$39.9K |
|
5338
Endava
DAVA
$153M
| $103K | ﹤0.01% |
3,536
-1,060
| -23% | -$31.5K |
|
5339
CALL
Ethan Allen Interiors
ETD
$583M
| $103K | ﹤0.01% |
3,700
-2,600
| -41% | -$77.1K |
|
5340
PUT
Everspin Technologies
MRAM
$339M
| $103K | ﹤0.01% |
17,200
-3,100
| -15% | -$20.5K |
|
5341
CALL
Plexus
PLXS
$6.47B
| $103K | ﹤0.01% |
1,000
-1,500
| -60% | -$154K |
|
5342
Tidal Trust II Defiance Nasdaq 100 Weekly Distribution ETF
QQQY
$180M
| $103K | ﹤0.01% |
2,311
+978
| +73% | +$44.3K |
|
5343
PUT
Summit Therapeutics
SMMT
$10.7B
| $103K | ﹤0.01% |
13,300
+5,800
| +77% | +$31.3K |
|
5344
Zymeworks
ZYME
$1.67B
| $103K | ﹤0.01% |
12,111
+8,965
| +285% | +$79.8K |
|
|
CDMO
5345
CALL
DELISTED
Avid Bioservices, Inc. Common Stock
CDMO
| $103K | ﹤0.01% |
14,500
-89,800
| -86% | -$687K |
|
5346
CALL
Acacia Research
ACTG
$426M
| $102K | ﹤0.01% |
20,500
-5,500
| -21% | -$28.5K |
|
5347
PUT
Amplitude
AMPL
$1.14B
| $102K | ﹤0.01% |
11,500
-1,700
| -13% | -$16K |
|
|
BLD
5348
DELISTED
TopBuild
BLD
| $102K | ﹤0.01% |
266
-6,823
| -96% | -$2.78M |
|
5349
PUT
Cognex
CGNX
$10.4B
| $102K | ﹤0.01% |
2,200
-67,200
| -97% | -$2.95M |
|
5350
CALL
Dyne Therapeutics
DYN
$4.8B
| $102K | ﹤0.01% |
2,900
-3,100
| -52% | -$90.1K |
|
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.