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 | |
|---|---|---|---|---|---|---|
4876
CALL
Veritone
VERI
$92.9M
| $159K | ﹤0.01% |
70,400
+31,400
| +81% | +$111K |
|
4877
Vir Biotechnology
VIR
$1.46B
| $159K | ﹤0.01% |
17,953
+13,221
| +279% | +$127K |
|
4878
CALL
Global X S&P 500 Tail Risk ETF
XTR
$4.71M
| $159K | ﹤0.01% |
5,100
+1,800
| +55% | +$53.5K |
|
4879
Backblaze
BLZE
$683M
| $158K | ﹤0.01% |
+25,773
| New | +$201K |
|
4880
PUT
Commault Systems
CVLT
$4.98B
| $158K | ﹤0.01% |
1,300
-100
| -7% | -$10.7K |
|
4881
GeoPark
GPRK
$609M
| $158K | ﹤0.01% |
14,431
-10,218
| -41% | -$102K |
|
4882
CALL
i3 Verticals
IIIV
$419M
| $158K | ﹤0.01% |
7,200
-18,200
| -72% | -$384K |
|
4883
Jackson Financial
JXN
$8.4B
| $158K | ﹤0.01% |
+2,141
| New | +$153K |
|
4884
CALL
Lexicon Pharmaceuticals
LXRX
$1.03B
| $158K | ﹤0.01% |
94,400
-17,500
| -16% | -$31.4K |
|
4885
PUT
Prosperity Bancshares
PB
$8.9B
| $158K | ﹤0.01% |
2,600
+800
| +44% | +$49.3K |
|
4886
CALL
Red Robin
RRGB
$139M
| $158K | ﹤0.01% |
21,000
+2,500
| +14% | +$18.2K |
|
|
VRNA
4887
DELISTED
Verona Pharma
VRNA
| $158K | ﹤0.01% |
10,937
-16,759
| -61% | -$245K |
|
|
BMTX
4888
CALL
DELISTED
BM Technologies, Inc.
BMTX
| $158K | ﹤0.01% |
70,600
+62,400
| +761% | +$142K |
|
|
SBOW
4889
CALL
DELISTED
SilverBow Resources, Inc.
SBOW
| $158K | ﹤0.01% |
4,200
-11,700
| -74% | -$411K |
|
4890
CALL
ALX Oncology
ALXO
$262M
| $157K | ﹤0.01% |
26,200
+18,900
| +259% | +$232K |
|
|
CRESY
4891
PUT
Cresud
CRESY
$806M
| $157K | ﹤0.01% |
19,362
+2,117
| +12% | +$19.4K |
|
4892
Mercer International
MERC
$40.5M
| $157K | ﹤0.01% |
18,426
-15,736
| -46% | -$152K |
|
|
RJET
4893
Republic Airways Holdings
RJET
$845M
| $157K | ﹤0.01% |
6,151
+5,653
| +1,135% | +$92.5K |
|
4894
ODDITY Tech
ODD
$690M
| $157K | ﹤0.01% |
4,014
-22,509
| -85% | -$838K |
|
4895
PUT
Sylvamo
SLVM
$1.52B
| $157K | ﹤0.01% |
2,300
-298,900
| -99% | -$19.7M |
|
4896
CALL
Tennant Co
TNC
$1.44B
| $157K | ﹤0.01% |
1,600
| – | – |
|
|
SUM
4897
CALL
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $157K | ﹤0.01% |
4,300
-5,200
| -55% | -$204K |
|
|
AMED
4898
CALL
DELISTED
Amedisys
AMED
| $156K | ﹤0.01% |
1,700
-800
| -32% | -$74.2K |
|
|
CHX
4899
PUT
DELISTED
ChampionX
CHX
| $156K | ﹤0.01% |
4,700
-32,700
| -87% | -$1.12M |
|
|
CSGS
4900
PUT
DELISTED
CSG Systems International
CSGS
| $156K | ﹤0.01% |
3,800
+2,000
| +111% | +$88.6K |
|
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.