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 | |
|---|---|---|---|---|---|---|
3976
PUT
Liberty Global Class C
LBTYK
$3.4B
| $266K | ﹤0.01% |
15,700
+14,000
| +824% | +$261K |
|
3977
CALL
PetMed Express
PETS
$43M
| $266K | ﹤0.01% |
19,300
-6,600
| -25% | -$99.1K |
|
3978
PUT
Paysafe
PSFE
$463M
| $266K | ﹤0.01% |
26,400
-9,900
| -27% | -$125K |
|
3979
Chefs' Warehouse
CHEF
$4.09B
| $265K | ﹤0.01% |
7,424
-7,262
| -49% | -$241K |
|
3980
PUT
LendingTree
TREE
$572M
| $265K | ﹤0.01% |
12,000
-5,500
| -31% | -$117K |
|
|
AEL
3981
PUT
DELISTED
American Equity Investment Life Holding Company
AEL
| $265K | ﹤0.01% |
5,100
-200
| -4% | -$8.04K |
|
3982
uniQure
QURE
$2.52B
| $264K | ﹤0.01% |
+23,123
| New | +$438K |
|
|
SNBR
3983
PUT
DELISTED
Sleep Number
SNBR
| $264K | ﹤0.01% |
9,700
+2,000
| +26% | +$45.7K |
|
3984
CALL
Virtu Financial
VIRT
$5.11B
| $264K | ﹤0.01% |
15,500
-30,700
| -66% | -$563K |
|
3985
W.R. Berkley
WRB
$28.3B
| $264K | ﹤0.01% |
+6,660
| New | +$262K |
|
3986
CALL
Idaho Strategic Resources
IDR
$456M
| $263K | ﹤0.01% |
49,300
-11,900
| -19% | -$63.1K |
|
|
KLR
3987
CALL
DELISTED
Kaleyra, Inc.
KLR
| $263K | ﹤0.01% |
+39,100
| New | +$104K |
|
3988
PUT
Alamos Gold
AGI
$12.1B
| $262K | ﹤0.01% |
22,000
-8,400
| -28% | -$107K |
|
3989
Corteva
CTVA
$59.5B
| $262K | ﹤0.01% |
4,583
-871
| -16% | -$50.8K |
|
|
CUK
3990
PUT
DELISTED
Carnival PLC
CUK
| $262K | ﹤0.01% |
15,500
-4,500
| -23% | -$47.2K |
|
3991
iShares Global Clean Energy ETF
ICLN
$2.27B
| $262K | ﹤0.01% |
+14,250
| New | +$268K |
|
|
HAPN
3992
PUT
Happen Inc
HAPN
$2.19B
| $262K | ﹤0.01% |
26,900
-21,500
| -44% | -$173K |
|
3993
CALL
Mettler-Toledo International
MTD
$28.1B
| $262K | ﹤0.01% |
200
-1,000
| -83% | -$1.41M |
|
3994
CALL
Global Partners
GLP
$1.65B
| $261K | ﹤0.01% |
8,500
-800
| -9% | -$24.4K |
|
3995
PUT
Kinsale Capital Group
KNSL
$8.43B
| $261K | ﹤0.01% |
700
-600
| -46% | -$199K |
|
3996
Dave & Buster's
PLAY
$361M
| $261K | ﹤0.01% |
+5,872
| New | +$214K |
|
3997
CALL
Triumph Financial Inc
TFIN
$1.84B
| $261K | ﹤0.01% |
4,300
-1,000
| -19% | -$54.9K |
|
3998
CALL
TMC The Metals Company
TMC
$1.56B
| $261K | ﹤0.01% |
160,600
+2,900
| +2% | +$2.63K |
|
|
BBIG
3999
CALL
DELISTED
Vinco Ventures, Inc. Common Stock
BBIG
| $261K | ﹤0.01% |
259,800
+247,470
| +2,007% | +$760K |
|
4000
Stratasys
SSYS
$690M
| $260K | ﹤0.01% |
14,640
-13,089
| -47% | -$205K |
|
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.