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 | |
|---|---|---|---|---|---|---|
1751
CALL
Gran Tierra Energy
GTE
$260M
| $2.62M | ﹤0.01% |
532,900
+479,100
| +891% | +$3.17M |
|
1752
CALL
Global E Online
GLBE
$6.08B
| $2.61M | ﹤0.01% |
63,800
-6,400
| -9% | -$211K |
|
1753
Navios Maritime Partners
NMM
$2.25B
| $2.61M | ﹤0.01% |
119,446
+68,403
| +134% | +$1.51M |
|
1754
PUT
Vanguard Short-Term Treasury ETF
VGSH
$29.3B
| $2.61M | ﹤0.01% |
38,900
+19,900
| +105% | +$1.16M |
|
|
VTLE
1755
PUT
DELISTED
Vital Energy
VTLE
| $2.6M | ﹤0.01% |
57,700
+10,700
| +23% | +$484K |
|
1756
CALL
Atkore
ATKR
$2.59B
| $2.6M | ﹤0.01% |
16,700
-1,900
| -10% | -$249K |
|
1757
PUT
Ares Capital
ARCC
$13.5B
| $2.6M | ﹤0.01% |
138,500
-288,600
| -68% | -$5.33M |
|
1758
CALL
Xylem
XYL
$28.5B
| $2.6M | ﹤0.01% |
23,100
-9,600
| -29% | -$1.02M |
|
1759
PUT
Bausch Health
BHC
$1.65B
| $2.6M | ﹤0.01% |
324,500
+26,500
| +9% | +$195K |
|
1760
Duke Energy
DUK
$102B
| $2.6M | ﹤0.01% |
+28,917
| New | +$2.73M |
|
1761
Palo Alto Networks
PANW
$264B
| $2.59M | ﹤0.01% |
+20,306
| New | +$2.11M |
|
1762
CALL
Travelers Companies
TRV
$80.8B
| $2.59M | ﹤0.01% |
94,300
+60,300
| +177% | +$10.6M |
|
1763
CALL
Green Plains
GPRE
$1.19B
| $2.59M | ﹤0.01% |
80,300
-19,000
| -19% | -$602K |
|
1764
CALL
Henry Schein
HSIC
$9.74B
| $2.59M | ﹤0.01% |
31,900
-50,400
| -61% | -$3.98M |
|
|
LTHM
1765
PUT
DELISTED
Livent Corporation
LTHM
| $2.59M | ﹤0.01% |
94,300
-14,800
| -14% | -$355K |
|
1766
CALL
American Eagle Outfitters
AEO
$2.85B
| $2.58M | ﹤0.01% |
218,800
-2,100
| -1% | -$26.2K |
|
1767
PUT
Cars.com
CARS
$641M
| $2.58M | ﹤0.01% |
130,000
-26,900
| -17% | -$506K |
|
|
AKRO
1768
DELISTED
Akero Therapeutics
AKRO
| $2.57M | ﹤0.01% |
55,001
+47,387
| +622% | +$2.17M |
|
1769
CALL
Asana
ASAN
$1.58B
| $2.57M | ﹤0.01% |
116,500
+10,600
| +10% | +$212K |
|
1770
PUT
Snap-on
SNA
$20.9B
| $2.56M | ﹤0.01% |
8,900
+8,800
| +8,800% | +$2.28M |
|
1771
PUT
Algonquin Power & Utilities
AQN
$4.69B
| $2.56M | ﹤0.01% |
310,200
+296,500
| +2,164% | +$2.52M |
|
|
ABB
1772
DELISTED
ABB Ltd
ABB
| $2.56M | ﹤0.01% |
65,156
+9,260
| +17% | +$330K |
|
1773
CALL
Corpay
CPAY
$24.2B
| $2.56M | ﹤0.01% |
10,200
-15,100
| -60% | -$3.44M |
|
1774
CALL
Boyd Gaming
BYD
$6.47B
| $2.56M | ﹤0.01% |
36,900
+3,300
| +10% | +$222K |
|
1775
PUT
MarineMax
HZO
$800M
| $2.56M | ﹤0.01% |
74,900
+34,400
| +85% | +$1.01M |
|
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.