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 | |
|---|---|---|---|---|---|---|
6526
PUT
Enovis
ENOV
$1.74B
| $25K | ﹤0.01% |
400
-100
| -20% | -$5.69K |
|
6527
CALL
EyePoint Inc
EYPT
$999M
| $25K | ﹤0.01% |
2,900
-10,300
| -78% | -$62.9K |
|
6528
First Interstate BancSystem
FIBK
$3.67B
| $25K | ﹤0.01% |
1,062
+593
| +126% | +$15K |
|
6529
CALL
Haemonetics
HAE
$3.88B
| $25K | ﹤0.01% |
300
-1,800
| -86% | -$152K |
|
6530
INmune Bio
INMB
$44.9M
| $25K | ﹤0.01% |
2,790
+650
| +30% | +$5.22K |
|
6531
PUT
Iris Energy
IREN
$10.5B
| $25K | ﹤0.01% |
5,400
+400
| +8% | +$1.53K |
|
6532
PUT
Kratos Defense & Security Solutions
KTOS
$8.23B
| $25K | ﹤0.01% |
1,800
-500
| -22% | -$6.77K |
|
6533
CALL
NewtekOne
NEWT
$426M
| $25K | ﹤0.01% |
1,600
-1,600
| -50% | -$21.1K |
|
6534
PUT
National Fuel Gas
NFG
$7.69B
| $25K | ﹤0.01% |
500
-200
| -29% | -$10.6K |
|
6535
Envista
NVST
$4.62B
| $25K | ﹤0.01% |
+760
| New | +$26.8K |
|
6536
News Corp Class B
NWS
$17.7B
| $25K | ﹤0.01% |
+1,309
| New | +$23.9K |
|
6537
PUT
Grupo Aeroportuario Centro Norte
OMAB
$5.14B
| $25K | ﹤0.01% |
300
-200
| -40% | -$17.3K |
|
6538
CALL
Old National Bancorp
ONB
$10.2B
| $25K | ﹤0.01% |
1,800
-2,000
| -53% | -$26.6K |
|
6539
PUT
Pitney Bowes
PBI
$2.39B
| $25K | ﹤0.01% |
7,100
-30,800
| -81% | -$107K |
|
|
PKST
6540
PUT
DELISTED
Peakstone Realty Trust
PKST
| $25K | ﹤0.01% |
+900
| New | +$23.4K |
|
6541
CALL
Outdoor Holding Co
POWW
$249M
| $25K | ﹤0.01% |
12,000
-21,200
| -64% | -$41.4K |
|
6542
CALL
Qualys
QLYS
$4.76B
| $25K | ﹤0.01% |
200
-53,000
| -100% | -$6.52M |
|
6543
CALL
Avita Medical
RCEL
$137M
| $25K | ﹤0.01% |
1,500
-8,000
| -84% | -$117K |
|
6544
Splash Beverage Group
SBEV
$2.01M
| $25K | ﹤0.01% |
145
+55
| +61% | +$10.1K |
|
6545
PUT
Scilex Holding
SCLX
$46.1M
| $25K | ﹤0.01% |
+131
| New | +$36.1K |
|
|
SII
6546
PUT
Sprott
SII
$2.68B
| $25K | ﹤0.01% |
800
-3,200
| -80% | -$111K |
|
6547
CALL
SelectQuote
SLQT
$122M
| $25K | ﹤0.01% |
13,200
-38,500
| -74% | -$64.8K |
|
6548
CALL
Southwest Gas
SWX
$6.64B
| $25K | ﹤0.01% |
400
+200
| +100% | +$11.8K |
|
6549
PUT
Kartoon Studios
TOON
$34M
| $25K | ﹤0.01% |
13,300
+1,900
| +17% | +$5.04K |
|
6550
PUT
Frontier Group Holdings
ULCC
$1.5B
| $25K | ﹤0.01% |
2,600
+1,300
| +100% | +$11.7K |
|
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.