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 | |
|---|---|---|---|---|---|---|
1876
CALL
ImmunityBio
IBRX
$7.44B
| $2.87M | ﹤0.01% |
454,300
-132,500
| -23% | -$874K |
|
1877
CALL
CBRE Group
CBRE
$40.8B
| $2.87M | ﹤0.01% |
32,200
+21,100
| +190% | +$1.87M |
|
1878
PUT
Matsons
MATX
$6.37B
| $2.87M | ﹤0.01% |
21,900
+21,500
| +5,375% | +$2.5M |
|
|
CBL
1879
CALL
DELISTED
CBL& Associates Properties, Inc.
CBL
| $2.87M | ﹤0.01% |
122,700
-7,000
| -5% | -$164K |
|
1880
Cogent Communications
CCOI
$594M
| $2.87M | ﹤0.01% |
+50,794
| New | +$3.03M |
|
1881
BioNTech
BNTX
$22.6B
| $2.86M | ﹤0.01% |
35,636
+29,971
| +529% | +$2.74M |
|
1882
PUT
Herbalife
HLF
$1.23B
| $2.85M | ﹤0.01% |
274,500
-265,600
| -49% | -$2.65M |
|
1883
PUT
JPMorgan Inflation Managed Bond ETF
JCPI
$865M
| $2.85M | ﹤0.01% |
51,400
+29,200
| +132% | +$1.35M |
|
1884
PUT
Symbotic
SYM
$5.11B
| $2.85M | ﹤0.01% |
81,100
-200
| -0.2% | -$8.09K |
|
|
RDFN
1885
CALL
DELISTED
Redfin
RDFN
| $2.85M | ﹤0.01% |
474,100
+148,100
| +45% | +$925K |
|
1886
PUT
Guardant Health
GH
$19.5B
| $2.85M | ﹤0.01% |
98,600
-123,100
| -56% | -$2.87M |
|
1887
PUT
Universal Health Services
UHS
$9.43B
| $2.85M | ﹤0.01% |
15,400
+9,800
| +175% | +$1.73M |
|
1888
California Resources
CRC
$4.75B
| $2.85M | ﹤0.01% |
53,470
+46,895
| +713% | +$2.39M |
|
1889
CALL
Payoneer
PAYO
$2.41B
| $2.85M | ﹤0.01% |
513,700
+294,700
| +135% | +$1.59M |
|
1890
CALL
Galicia Financial Group
GGAL
$7.92B
| $2.84M | ﹤0.01% |
93,000
-139,500
| -60% | -$4.48M |
|
1891
PUT
SiriusXM
SIRI
$10B
| $2.84M | ﹤0.01% |
100,440
-43,540
| -30% | -$1.3M |
|
1892
PUT
Fortive
FTV
$19B
| $2.84M | ﹤0.01% |
50,824
+133
| +0.3% | +$7.72K |
|
1893
MakeMyTrip
MMYT
$4.67B
| $2.84M | ﹤0.01% |
33,752
+7,914
| +31% | +$591K |
|
|
XIFR
1894
PUT
XPLR Infrastructure LP
XIFR
$1.18B
| $2.84M | ﹤0.01% |
102,700
+22,700
| +28% | +$689K |
|
1895
PUT
Barclays
BCS
$94.1B
| $2.83M | ﹤0.01% |
264,600
-81,500
| -24% | -$847K |
|
1896
Align Technology
ALGN
$12B
| $2.83M | ﹤0.01% |
+11,722
| New | +$3.26M |
|
1897
CALL
ACM Research
ACMR
$5.83B
| $2.83M | ﹤0.01% |
122,700
-102,100
| -45% | -$2.58M |
|
|
COOP
1898
PUT
DELISTED
Mr. Cooper
COOP
| $2.83M | ﹤0.01% |
34,800
+6,900
| +25% | +$555K |
|
1899
PUT
Magna International
MGA
$17.9B
| $2.82M | ﹤0.01% |
67,400
+49,900
| +285% | +$2.33M |
|
1900
Clorox
CLX
$11.6B
| $2.82M | ﹤0.01% |
+20,688
| New | +$2.87M |
|
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.