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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
901
CALL
GSK
GSK
$102B
| $9.82M | 0.01% |
310,600
-19,500
| -6% | -$699K |
|
902
PUT
Campbell Soup
CPB
$6.38B
| $9.82M | 0.01% |
214,800
+18,000
| +9% | +$928K |
|
|
SGEN
903
CALL
DELISTED
Seagen Inc. Common Stock
SGEN
| $9.8M | 0.01% |
50,900
+9,900
| +24% | +$1.97M |
|
904
CALL
SentinelOne
S
$5.96B
| $9.79M | 0.01% |
648,600
+110,500
| +21% | +$1.87M |
|
905
CALL
American Electric Power
AEP
$73.4B
| $9.72M | 0.01% |
115,500
-53,300
| -32% | -$4.71M |
|
906
State Street SPDR S&P Biotech ETF
XBI
$10.2B
| $9.72M | 0.01% |
116,879
+37,260
| +47% | +$3.12M |
|
907
PUT
Peloton Interactive
PTON
$2.61B
| $9.72M | 0.01% |
1,264,100
-103,000
| -8% | -$875K |
|
908
PUT
Elevance Health
ELV
$82.3B
| $9.69M | 0.01% |
21,800
+5,600
| +35% | +$2.58M |
|
909
PUT
Regions Financial
RF
$26.2B
| $9.65M | 0.01% |
541,700
+336,500
| +164% | +$5.94M |
|
910
Twilio
TWLO
$28.1B
| $9.65M | 0.01% |
151,671
+120,290
| +383% | +$7.1M |
|
911
PUT
Duke Energy
DUK
$101B
| $9.62M | 0.01% |
107,200
-122,600
| -53% | -$11.6M |
|
912
CALL
Citizens Financial Group
CFG
$30.3B
| $9.62M | 0.01% |
368,800
+84,900
| +30% | +$2.34M |
|
913
PUT
GoDaddy
GDDY
$11.6B
| $9.62M | 0.01% |
128,000
+125,000
| +4,167% | +$9.23M |
|
914
CALL
NetEase
NTES
$76.9B
| $9.61M | 0.01% |
99,400
-134,600
| -58% | -$12.2M |
|
915
PUT
ClearShares Piton Intermediate Fixed Income ETF
PIFI
$97.3M
| $9.6M | 0.01% |
447,700
-45,400
| -9% | -$4.19M |
|
916
CALL
Cheniere Energy
LNG
$57B
| $9.6M | 0.01% |
63,000
-136,900
| -68% | -$20.3M |
|
917
PUT
Dell
DELL
$284B
| $9.59M | 0.01% |
177,300
+44,400
| +33% | +$2.04M |
|
918
CALL
Targa Resources
TRGP
$61.3B
| $9.59M | 0.01% |
126,000
+82,000
| +186% | +$5.95M |
|
919
CALL
Virgin Galactic
SPCE
$332M
| $9.55M | 0.01% |
123,035
+90,445
| +278% | +$7.16M |
|
920
PUT
Clorox
CLX
$11.3B
| $9.54M | 0.01% |
60,000
+30,300
| +102% | +$4.89M |
|
921
PUT
Suncor Energy
SU
$78.4B
| $9.53M | 0.01% |
325,200
+55,600
| +21% | +$1.66M |
|
922
Baidu
BIDU
$36.5B
| $9.52M | 0.01% |
69,566
+11,285
| +19% | +$1.48M |
|
923
CALL
Vertiv
VRT
$117B
| $9.5M | 0.01% |
383,700
+240,100
| +167% | +$4.12M |
|
924
Mercado Libre
MELI
$91.2B
| $9.49M | 0.01% |
8,009
+6,086
| +316% | +$7.65M |
|
925
PUT
International Flavors & Fragrances
IFF
$18.8B
| $9.46M | 0.01% |
118,900
+66,900
| +129% | +$5.76M |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.