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 | |
|---|---|---|---|---|---|---|
1026
CALL
Beyond Meat
BYND
$283M
| $8.02M | 0.01% |
618,200
+138,100
| +29% | +$1.75M |
|
1027
CALL
Sunrun
RUN
$2.38B
| $8.01M | 0.01% |
448,700
-251,600
| -36% | -$4.68M |
|
1028
PUT
Fair Isaac
FICO
$28.7B
| $8.01M | 0.01% |
9,900
+2,300
| +30% | +$1.72M |
|
1029
PUT
Intercontinental Exchange
ICE
$80.9B
| $8.01M | 0.01% |
70,800
-20,400
| -22% | -$2.21M |
|
1030
Teva Pharmaceuticals
TEVA
$36.2B
| $7.99M | 0.01% |
1,061,541
+22,734
| +2% | +$184K |
|
1031
PUT
Unilever
UL
$131B
| $7.99M | 0.01% |
136,267
+34,489
| +34% | +$2.05M |
|
1032
CALL
Toyota
TM
$210B
| $7.99M | 0.01% |
49,700
+42,100
| +554% | +$6.06M |
|
1033
CALL
Pan American Silver
PAAS
$18.7B
| $7.96M | 0.01% |
607,600
+369,700
| +155% | +$6.11M |
|
1034
PUT
Bank OZK
OZK
$5.46B
| $7.95M | 0.01% |
197,900
+24,900
| +14% | +$893K |
|
1035
PUT
Dolby
DLB
$4.7B
| $7.94M | 0.01% |
94,900
-4,500
| -5% | -$376K |
|
1036
CALL
Matador Resources
MTDR
$6.47B
| $7.94M | 0.01% |
151,700
+105,700
| +230% | +$5.11M |
|
1037
CALL
LyondellBasell Industries
LYB
$19.7B
| $7.92M | 0.01% |
86,300
-15,900
| -16% | -$1.45M |
|
1038
PUT
Bilibili
BILI
$7.24B
| $7.92M | 0.01% |
524,500
-439,500
| -46% | -$8.07M |
|
1039
PUT
ProShares UltraShort Health Care
RXD
$3.3M
| $7.9M | 0.01% |
148,800
-391,950
| -72% | -$9.92M |
|
1040
Zoom
ZM
$25.5B
| $7.89M | 0.01% |
116,217
-141,345
| -55% | -$9.45M |
|
1041
PUT
American Tower
AMT
$78.6B
| $7.85M | 0.01% |
40,500
-118,700
| -75% | -$23.2M |
|
|
CFLT
1042
CALL
DELISTED
Confluent
CFLT
| $7.85M | 0.01% |
222,300
-20,200
| -8% | -$565K |
|
1043
CALL
Trip.com Group
TCOM
$27.5B
| $7.84M | 0.01% |
223,900
-85,300
| -28% | -$2.97M |
|
1044
PUT
Kohl's
KSS
$2.08B
| $7.83M | 0.01% |
339,500
-13,500
| -4% | -$292K |
|
1045
CALL
Mobileye
MBLY
$6.78B
| $7.81M | 0.01% |
203,400
+69,200
| +52% | +$2.81M |
|
1046
CALL
Cirrus Logic
CRUS
$6.75B
| $7.79M | 0.01% |
96,100
| – | – |
|
1047
CALL
Annaly Capital Management
NLY
$16.9B
| $7.77M | 0.01% |
388,300
-2,000
| -0.5% | -$38.9K |
|
1048
PUT
Academy Sports + Outdoors
ASO
$2.88B
| $7.74M | 0.01% |
143,200
-236,000
| -62% | -$13.6M |
|
1049
PUT
Thor Industries
THO
$3.96B
| $7.73M | 0.01% |
74,700
-46,900
| -39% | -$3.96M |
|
1050
Southwest Airlines
LUV
$21.9B
| $7.73M | 0.01% |
213,480
+104,883
| +97% | +$3.29M |
|
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.