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 | |
|---|---|---|---|---|---|---|
|
MORF
4676
CALL
DELISTED
Morphic Holding, Inc. Common Stock
MORF
| $143K | ﹤0.01% |
2,500
-135,400
| -98% | -$7.07M |
|
|
DRRX
4677
DELISTED
DURECT Corp
DRRX
| $142K | ﹤0.01% |
28,727
-79,800
| -74% | -$405K |
|
4678
PUT
MacroGenics
MGNX
$233M
| $142K | ﹤0.01% |
26,700
+7,400
| +38% | +$45.6K |
|
4679
PUT
Insperity
NSP
$2.03B
| $142K | ﹤0.01% |
1,200
+200
| +20% | +$23.7K |
|
|
ORC
4680
CALL
Orchid Island Capital
ORC
$1.31B
| $142K | ﹤0.01% |
13,800
-3,200
| -19% | -$33.1K |
|
4681
CALL
United Bankshares
UBSI
$6.69B
| $142K | ﹤0.01% |
4,800
+400
| +9% | +$12.6K |
|
|
YALA
4682
PUT
Yalla Group
YALA
$814M
| $142K | ﹤0.01% |
32,600
+19,900
| +157% | +$79.6K |
|
4683
CALL
Carlyle Secured Lending
CGBD
$708M
| $141K | ﹤0.01% |
9,700
-11,800
| -55% | -$164K |
|
4684
CALL
Flowserve
FLS
$8.94B
| $141K | ﹤0.01% |
3,800
+1,400
| +58% | +$48.6K |
|
4685
PUT
Fox Factory Holding Corp
FOXF
$794M
| $141K | ﹤0.01% |
1,300
-1,800
| -58% | -$184K |
|
4686
Par Pacific Holdings
PARR
$4.17B
| $141K | ﹤0.01% |
5,336
-15,415
| -74% | -$364K |
|
4687
PUT
PRA Group
PRAA
$672M
| $141K | ﹤0.01% |
6,200
+6,100
| +6,100% | +$169K |
|
4688
CALL
WEC Energy
WEC
$36.3B
| $141K | ﹤0.01% |
1,600
-2,300
| -59% | -$212K |
|
|
NVTA
4689
PUT
DELISTED
Invitae Corporation
NVTA
| $141K | ﹤0.01% |
124,900
-135,800
| -52% | -$171K |
|
4690
CALL
Fulgent Genetics
FLGT
$558M
| $140K | ﹤0.01% |
3,800
+300
| +9% | +$10.5K |
|
|
XRN
4691
PUT
Chiron Real Estate Inc
XRN
$535M
| $140K | ﹤0.01% |
3,080
+1,680
| +120% | +$75.9K |
|
4692
CALL
Horizon Technology Finance
HRZN
$294M
| $140K | ﹤0.01% |
11,600
+4,800
| +71% | +$57.5K |
|
4693
CALL
PubMatic
PUBM
$608M
| $140K | ﹤0.01% |
7,700
+2,700
| +54% | +$42.9K |
|
|
SUPV
4694
PUT
Grupo Supervielle
SUPV
$823M
| $140K | ﹤0.01% |
45,200
-20,900
| -32% | -$51.3K |
|
4695
CALL
The Bancorp
TBBK
$2.81B
| $140K | ﹤0.01% |
+4,300
| New | +$132K |
|
|
UCAR
4696
U Power Ltd
UCAR
$26M
| $140K | ﹤0.01% |
+20
| New | +$129K |
|
4697
CALL
Designer Brands
DBI
$315M
| $139K | ﹤0.01% |
13,800
+6,400
| +86% | +$52.8K |
|
4698
CALL
Four Corners Property Trust
FCPT
$2.89B
| $139K | ﹤0.01% |
5,500
-300
| -5% | -$7.76K |
|
4699
KraneShares Global Carbon Strategy ETF
KRBN
$139M
| $139K | ﹤0.01% |
3,682
-8,617
| -70% | -$335K |
|
4700
Miller Industries
MLR
$577M
| $139K | ﹤0.01% |
+3,931
| New | +$136K |
|
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.