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 | |
|---|---|---|---|---|---|---|
976
CALL
Ciena
CIEN
$57.7B
| $10.7M | 0.01% |
222,300
-145,400
| -40% | -$6.9M |
|
977
CALL
Macy's
M
$6.14B
| $10.7M | 0.01% |
557,200
-720,100
| -56% | -$13.8M |
|
978
PUT
3M
MMM
$87.5B
| $10.7M | 0.01% |
264,400
-120,832
| -31% | -$11.8M |
|
979
PUT
Calumet Specialty Products
CLMT
$3.73B
| $10.7M | 0.01% |
664,200
+217,500
| +49% | +$3.43M |
|
|
DOCU
980
PUT
DocuSign
DOCU
$8.98B
| $10.6M | 0.01% |
198,400
-18,000
| -8% | -$1.02M |
|
981
CALL
CoStar Group
CSGP
$11.1B
| $10.6M | 0.01% |
143,100
+83,300
| +139% | +$7.06M |
|
982
CALL
Southern Copper
SCCO
$143B
| $10.6M | 0.01% |
105,094
+4,234
| +4% | +$451K |
|
983
CALL
Vanguard Short-Term Treasury ETF
VGSH
$29.2B
| $10.6M | 0.01% |
172,300
+90,100
| +110% | +$5.21M |
|
984
CALL
Qorvo
QRVO
$7.65B
| $10.6M | 0.01% |
91,100
+31,300
| +52% | +$3.33M |
|
|
985
3M
MMM
$87.5B
| $10.5M | 0.01% |
103,025
-124,842
| -55% | -$12.2M |
|
986
PUT
Rockwell Automation
ROK
$51.3B
| $10.5M | 0.01% |
38,200
+26,100
| +216% | +$7.04M |
|
987
PUT
Nutrien
NTR
$32.9B
| $10.5M | 0.01% |
206,300
-115,500
| -36% | -$6.32M |
|
988
CALL
Burlington
BURL
$21.4B
| $10.5M | 0.01% |
43,600
-15,200
| -26% | -$3.13M |
|
989
Gilead Sciences
GILD
$162B
| $10.5M | 0.01% |
152,442
+51,199
| +51% | +$3.42M |
|
990
CALL
Air Products & Chemicals
APD
$65.5B
| $10.5M | 0.01% |
40,500
-107,400
| -73% | -$27.2M |
|
991
C3.ai
AI
$1.27B
| $10.4M | 0.01% |
360,674
-136,456
| -27% | -$3.5M |
|
992
CALL
Exelon
EXC
$48.4B
| $10.4M | 0.01% |
301,800
-53,000
| -15% | -$1.96M |
|
993
PUT
Advance Auto Parts
AAP
$3.22B
| $10.4M | 0.01% |
164,900
-287,300
| -64% | -$20.6M |
|
994
CALL
Duolingo
DUOL
$5.62B
| $10.4M | 0.01% |
50,000
+200
| +0.4% | +$41K |
|
995
PUT
Riot Platforms
RIOT
$9.02B
| $10.4M | 0.01% |
1,138,100
-418,800
| -27% | -$4.23M |
|
996
CALL
Alamos Gold
AGI
$12.3B
| $10.4M | 0.01% |
662,800
+56,800
| +9% | +$889K |
|
|
SPR
997
PUT
DELISTED
Spirit AeroSystems
SPR
| $10.4M | 0.01% |
315,600
-41,200
| -12% | -$1.32M |
|
998
PUT
GitLab
GTLB
$5.1B
| $10.4M | 0.01% |
208,600
-82,200
| -28% | -$4.27M |
|
999
PUT
Progressive
PGR
$120B
| $10.3M | 0.01% |
49,800
-23,900
| -32% | -$5M |
|
1000
CALL
Levi Strauss
LEVI
$9.27B
| $10.3M | 0.01% |
536,300
+379,700
| +242% | +$8.32M |
|
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.