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 | |
|---|---|---|---|---|---|---|
6201
PUT
Shenandoah Telecom
SHEN
$631M
| $45K | ﹤0.01% |
2,800
+300
| +12% | +$4.83K |
|
6202
Telecom Argentina
TEO
$5.99B
| $45K | ﹤0.01% |
6,245
+1,738
| +39% | +$13.9K |
|
6203
PUT
ReposiTrak
TRAK
$157M
| $45K | ﹤0.01% |
+3,000
| New | +$48.3K |
|
6204
Direxion Daily Dow Jones Internet Bull 3X ETF
WEBL
$85.6M
| $45K | ﹤0.01% |
2,536
+1,137
| +81% | +$19.7K |
|
|
CUTR
6205
DELISTED
Cutera, Inc.
CUTR
| $45K | ﹤0.01% |
+29,804
| New | +$59.9K |
|
|
NKLA
6206
DELISTED
Nikola Corporation Common Stock
NKLA
| $45K | ﹤0.01% |
5,616
-23,637
| -81% | -$422K |
|
|
LUNA
6207
DELISTED
Luna Innovations Incorporated
LUNA
| $45K | ﹤0.01% |
14,236
+12,617
| +779% | +$37.4K |
|
6208
CALL
Alarm.com
ALRM
$2.68B
| $44K | ﹤0.01% |
700
+400
| +133% | +$26.4K |
|
6209
CALL
Clean Energy Fuels
CLNE
$425M
| $44K | ﹤0.01% |
16,800
-3,500
| -17% | -$9.02K |
|
6210
PUT
Immunic
IMUX
$191M
| $44K | ﹤0.01% |
4,010
-780
| -16% | -$9.69K |
|
6211
Lantronix
LTRX
$239M
| $44K | ﹤0.01% |
12,560
+10,990
| +700% | +$39.4K |
|
6212
PUT
LHA Market State Tactical Beta ETF
MSTB
$193M
| $44K | ﹤0.01% |
2,500
+2,400
| +2,400% | +$75.1K |
|
|
TRTX
6213
CALL
TPG RE Finance Trust
TRTX
$628M
| $44K | ﹤0.01% |
5,200
+3,300
| +174% | +$27.1K |
|
6214
YieldMax TSLA Option Income Strategy ETF
TSLY
$622M
| $44K | ﹤0.01% |
550
-283
| -34% | -$21.4K |
|
6215
Village Farms International
VFF
$242M
| $44K | ﹤0.01% |
43,941
+40,684
| +1,249% | +$49.5K |
|
6216
Zurn Elkay Water Solutions
ZWS
$8.31B
| $44K | ﹤0.01% |
1,497
-2,749
| -65% | -$86.6K |
|
6217
CALL
BuzzFeed
BZFD
$99.9M
| $43K | ﹤0.01% |
15,700
+14,200
| +947% | +$30K |
|
|
CIVI
6218
DELISTED
Civitas Resources
CIVI
| $43K | ﹤0.01% |
+633
| New | +$45.8K |
|
6219
CALL
ClearPoint Neuro
CLPT
$437M
| $43K | ﹤0.01% |
8,100
-12,000
| -60% | -$69.4K |
|
6220
CALL
Americold
COLD
$4.13B
| $43K | ﹤0.01% |
1,700
| – | – |
|
6221
PUT
Clearway Energy Class C
CWEN
$4.94B
| $43K | ﹤0.01% |
1,800
+100
| +6% | +$2.53K |
|
6222
CALL
First American
FAF
$7.71B
| $43K | ﹤0.01% |
800
-100
| -11% | -$5.56K |
|
6223
Great Southern Bancorp
GSBC
$872M
| $43K | ﹤0.01% |
780
-374
| -32% | -$19.6K |
|
6224
Inter&Co
INTR
$2.49B
| $43K | ﹤0.01% |
+7,046
| New | +$40.6K |
|
6225
CALL
Liberty Broadband Class C
LBRDK
$4.79B
| $43K | ﹤0.01% |
800
-53,900
| -99% | -$2.78M |
|
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.