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 | |
|---|---|---|---|---|---|---|
|
GTM
951
CALL
ZoomInfo Technologies
GTM
$849M
| $11.1M | 0.01% |
867,300
+728,500
| +525% | +$10.2M |
|
952
CALL
Madrigal Pharmaceuticals
MDGL
$12.5B
| $11M | 0.01% |
39,400
-32,800
| -45% | -$7.81M |
|
953
PUT
KeyCorp
KEY
$24.4B
| $11M | 0.01% |
776,500
-184,400
| -19% | -$2.68M |
|
954
Southwest Airlines
LUV
$21.9B
| $11M | 0.01% |
384,844
+341,323
| +784% | +$9.52M |
|
955
CALL
T. Rowe Price
TROW
$24.6B
| $11M | 0.01% |
95,100
-50,800
| -35% | -$5.84M |
|
956
PUT
Futu Holdings
FUTU
$13.9B
| $10.9M | 0.01% |
166,900
-104,800
| -39% | -$7.09M |
|
957
PUT
Coupang
CPNG
$28.1B
| $10.9M | 0.01% |
521,100
+56,600
| +12% | +$1.23M |
|
|
MRSH
958
CALL
Marsh
MRSH
$84.2B
| $10.9M | 0.01% |
51,800
+7,200
| +16% | +$1.48M |
|
959
PUT
Franco-Nevada
FNV
$41.3B
| $10.9M | 0.01% |
91,700
+11,800
| +15% | +$1.43M |
|
960
PUT
FMC
FMC
$1.46B
| $10.9M | 0.01% |
188,800
-123,300
| -40% | -$7.37M |
|
961
PUT
Zions Bancorporation
ZION
$10.1B
| $10.9M | 0.01% |
250,300
-218,600
| -47% | -$9.23M |
|
962
PUT
BioNTech
BNTX
$23.3B
| $10.8M | 0.01% |
134,900
+11,600
| +9% | +$1.06M |
|
963
CALL
Teradyne
TER
$58.5B
| $10.8M | 0.01% |
73,100
+20,400
| +39% | +$2.59M |
|
964
CALL
Fidelity National Information Services
FIS
$20.7B
| $10.8M | 0.01% |
143,500
-22,600
| -14% | -$1.67M |
|
|
WCC
965
PUT
WESCO International
WCC
$16.1B
| $10.8M | 0.01% |
68,200
+1,700
| +3% | +$289K |
|
|
BNY
966
CALL
Bank of New York Mellon
BNY
$109B
| $10.8M | 0.01% |
180,300
-85,200
| -32% | -$4.93M |
|
967
CALL
KBR
KBR
$4.61B
| $10.8M | 0.01% |
168,000
+48,400
| +40% | +$3.13M |
|
968
PUT
Bank OZK
OZK
$5.47B
| $10.8M | 0.01% |
262,800
+172,000
| +189% | +$7.48M |
|
|
FL
969
PUT
DELISTED
Foot Locker
FL
| $10.8M | 0.01% |
432,200
-20,100
| -4% | -$478K |
|
970
CALL
Pultegroup
PHM
$23.7B
| $10.8M | 0.01% |
97,800
-78,900
| -45% | -$8.96M |
|
971
CALL
Group 1 Automotive
GPI
$3.89B
| $10.8M | 0.01% |
36,200
+22,900
| +172% | +$6.78M |
|
972
PUT
Hims & Hers Health
HIMS
$7.58B
| $10.7M | 0.01% |
532,400
+456,400
| +601% | +$7.59M |
|
973
CALL
Tractor Supply
TSCO
$15.9B
| $10.7M | 0.01% |
199,000
-132,000
| -40% | -$7.1M |
|
974
PUT
Jabil
JBL
$33.7B
| $10.7M | 0.01% |
98,700
-58,700
| -37% | -$7.11M |
|
|
ARCH
975
CALL
DELISTED
Arch Resources, Inc.
ARCH
| $10.7M | 0.01% |
70,500
+23,300
| +49% | +$3.74M |
|
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.