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 | |
|---|---|---|---|---|---|---|
1101
CALL
KeyCorp
KEY
$24.4B
| $6.96M | 0.01% |
753,200
+446,000
| +145% | +$4.66M |
|
1102
CALL
Diageo
DEO
$45.7B
| $6.96M | 0.01% |
40,100
+4,700
| +13% | +$839K |
|
1103
VanEck Gold Miners ETF
GDX
$22.9B
| $6.95M | 0.01% |
230,854
-186,030
| -45% | -$6.06M |
|
1104
CALL
Whirlpool
WHR
$2.31B
| $6.93M | 0.01% |
46,600
-48,300
| -51% | -$6.63M |
|
|
FSR
1105
CALL
DELISTED
Fisker Inc.
FSR
| $6.93M | 0.01% |
1,229,200
+154,200
| +14% | +$889K |
|
1106
PUT
Global Payments
GPN
$21.3B
| $6.92M | 0.01% |
70,300
-106,400
| -60% | -$10.9M |
|
|
APLS
1107
DELISTED
Apellis Pharmaceuticals
APLS
| $6.92M | 0.01% |
76,011
+72,588
| +2,121% | +$6.26M |
|
1108
CALL
JB Hunt Transport Services
JBHT
$27.2B
| $6.92M | 0.01% |
38,200
+29,000
| +315% | +$5.04M |
|
|
WWE
1109
CALL
DELISTED
World Wrestling Entertainment
WWE
| $6.86M | 0.01% |
63,200
-87,500
| -58% | -$9.05M |
|
1110
CALL
UiPath
PATH
$5.28B
| $6.85M | 0.01% |
413,500
+167,100
| +68% | +$2.68M |
|
1111
PUT
Paychex
PAYX
$39.4B
| $6.83M | 0.01% |
61,100
+2,700
| +5% | +$295K |
|
1112
PUT
Molson Coors Class B
TAP
$7.51B
| $6.83M | 0.01% |
103,800
+81,300
| +361% | +$5.03M |
|
1113
CALL
Manchester United
MANU
$3.85B
| $6.83M | 0.01% |
280,200
-210,300
| -43% | -$4.35M |
|
|
PXD
1114
DELISTED
Pioneer Natural Resource Co.
PXD
| $6.8M | 0.01% |
+32,837
| New | +$6.91M |
|
1115
CALL
Ovintiv
OVV
$17.3B
| $6.8M | 0.01% |
178,600
+100,300
| +128% | +$3.63M |
|
|
FTCH
1116
PUT
DELISTED
Farfetch Limited Class A Ordinary Shares
FTCH
| $6.79M | 0.01% |
1,124,800
-169,300
| -13% | -$815K |
|
1117
CALL
Sempra
SRE
$61.1B
| $6.78M | 0.01% |
93,200
+52,600
| +130% | +$3.95M |
|
|
GTM
1118
PUT
ZoomInfo Technologies
GTM
$849M
| $6.78M | 0.01% |
267,100
-143,700
| -35% | -$3.4M |
|
1119
PUT
Jabil
JBL
$33.7B
| $6.78M | 0.01% |
62,800
+3,600
| +6% | +$317K |
|
1120
CALL
Bilibili
BILI
$7.32B
| $6.73M | 0.01% |
446,000
-856,200
| -66% | -$15.7M |
|
1121
PUT
CME Group
CME
$91.9B
| $6.73M | 0.01% |
36,300
-57,000
| -61% | -$10.5M |
|
1122
CALL
KE Holdings
BEKE
$17B
| $6.72M | 0.01% |
452,700
+159,800
| +55% | +$2.61M |
|
|
1123
PUT
KeyCorp
KEY
$24.4B
| $6.72M | 0.01% |
727,500
+78,400
| +12% | +$818K |
|
1124
CALL
Knight Transportation
KNX
$11.8B
| $6.7M | 0.01% |
120,600
-78,900
| -40% | -$4.4M |
|
|
AYX
1125
PUT
DELISTED
Alteryx Inc
AYX
| $6.69M | 0.01% |
147,400
+54,000
| +58% | +$2.37M |
|
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.