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 | |
|---|---|---|---|---|---|---|
4176
CALL
Dream Finders Homes
DFH
$1.42B
| $312K | ﹤0.01% |
12,100
+6,800
| +128% | +$215K |
|
4177
CALL
National Bank Holdings
NBHC
$1.89B
| $312K | ﹤0.01% |
+8,000
| New | +$284K |
|
4178
CALL
ASE Group
ASX
$69.5B
| $311K | ﹤0.01% |
27,300
-66,200
| -71% | -$718K |
|
4179
PUT
Denali Therapeutics
DNLI
$3.76B
| $311K | ﹤0.01% |
13,400
-15,700
| -54% | -$301K |
|
4180
PUT
Expeditors International
EXPD
$22.3B
| $311K | ﹤0.01% |
2,500
-4,900
| -66% | -$584K |
|
4181
Lantheus
LNTH
$6.53B
| $311K | ﹤0.01% |
+3,878
| New | +$284K |
|
4182
PUT
Procept Biorobotics
PRCT
$1.01B
| $311K | ﹤0.01% |
5,100
-15,600
| -75% | -$928K |
|
4183
CALL
RLX Technology
RLX
$2.37B
| $311K | ﹤0.01% |
169,200
-44,100
| -21% | -$83.4K |
|
|
DMC
4184
PUT
Del Monte Corp
DMC
$1.42B
| $310K | ﹤0.01% |
14,200
+5,800
| +69% | +$139K |
|
4185
Liquidia Corp
LQDA
$7.7B
| $310K | ﹤0.01% |
25,890
+8,377
| +48% | +$111K |
|
4186
PUT
Popular Inc
BPOP
$11B
| $309K | ﹤0.01% |
3,500
-500
| -13% | -$43.5K |
|
4187
CALL
Ingredion
INGR
$6.43B
| $309K | ﹤0.01% |
2,700
+2,200
| +440% | +$254K |
|
|
VLD
4188
PUT
DELISTED
Velo3D, Inc.
VLD
| $309K | ﹤0.01% |
93,200
+91,794
| +6,529% | +$730K |
|
|
FOLD
4189
PUT
DELISTED
Amicus Therapeutics
FOLD
| $308K | ﹤0.01% |
31,100
-27,900
| -47% | -$286K |
|
4190
Geron
GERN
$905M
| $308K | ﹤0.01% |
+72,707
| New | +$283K |
|
4191
CALL
Ironwood Pharmaceuticals
IRWD
$584M
| $308K | ﹤0.01% |
47,300
-584,200
| -93% | -$4.13M |
|
4192
PUT
Zymeworks
ZYME
$1.61B
| $308K | ﹤0.01% |
36,200
+27,200
| +302% | +$242K |
|
|
BLUE
4193
DELISTED
bluebird bio
BLUE
| $307K | ﹤0.01% |
15,631
+2,604
| +20% | +$52.2K |
|
4194
PUT
Backblaze
BLZE
$682M
| $307K | ﹤0.01% |
49,900
+48,700
| +4,058% | +$380K |
|
4195
PUT
Invesco CurrencyShares Canadian Dollar Trust
FXC
$73.1M
| $307K | ﹤0.01% |
4,300
+1,200
| +39% | +$85.8K |
|
4196
Ouster
OUST
$2.09B
| $306K | ﹤0.01% |
31,155
+28,575
| +1,108% | +$289K |
|
4197
PUT
Solventum
SOLV
$15.3B
| $306K | ﹤0.01% |
+5,800
| New | +$352K |
|
4198
PUT
Sinclair Inc
SBGI
$1.02B
| $305K | ﹤0.01% |
22,900
+5,000
| +28% | +$64K |
|
|
TUP
4199
CALL
DELISTED
Tupperware Brands Corporation
TUP
| $305K | ﹤0.01% |
217,900
+53,300
| +32% | +$75.3K |
|
4200
CALL
Broadstone Net Lease
BNL
$4.25B
| $304K | ﹤0.01% |
19,200
-1,400
| -7% | -$21.2K |
|
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.