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 | |
|---|---|---|---|---|---|---|
4026
CALL
Imperial Oil
IMO
$60.8B
| $255K | ﹤0.01% |
5,000
-2,200
| -31% | -$109K |
|
|
SVC
4027
PUT
Service Properties Trust
SVC
$1.09B
| $255K | ﹤0.01% |
5,880
-540
| -8% | -$23.7K |
|
|
CDMO
4028
PUT
DELISTED
Avid Bioservices, Inc. Common Stock
CDMO
| $255K | ﹤0.01% |
18,300
+9,400
| +106% | +$160K |
|
|
SFIX
4029
PUT
Stitch Fix
SFIX
$563M
| $254K | ﹤0.01% |
66,100
+52,300
| +379% | +$198K |
|
4030
Adtran
ADTN
$730M
| $253K | ﹤0.01% |
24,070
+23,687
| +6,185% | +$235K |
|
|
BCTX
4031
Briacell Therapeutics
BCTX
$30.2M
| $253K | ﹤0.01% |
263
+256
| +3,657% | +$253K |
|
4032
PUT
BlackLine
BL
$1.87B
| $252K | ﹤0.01% |
4,700
-3,300
| -41% | -$183K |
|
4033
PUT
Lufax Holding
LU
$1.33B
| $252K | ﹤0.01% |
44,150
+11,000
| +33% | +$72.7K |
|
4034
Patrick Industries
PATK
$2.91B
| $252K | ﹤0.01% |
4,739
-4,770
| -50% | -$225K |
|
4035
CALL
Qiagen
QGEN
$8.72B
| $252K | ﹤0.01% |
5,281
| – | – |
|
4036
CALL
Veru
VERU
$35.8M
| $252K | ﹤0.01% |
21,220
-11,940
| -36% | -$140K |
|
|
SILV
4037
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $252K | ﹤0.01% |
43,166
-3,260
| -7% | -$21.4K |
|
|
AIRC
4038
CALL
DELISTED
Apartment Income REIT Corp.
AIRC
| $252K | ﹤0.01% |
7,000
+6,000
| +600% | +$214K |
|
4039
PUT
Acadia Pharmaceuticals
ACAD
$4.45B
| $251K | ﹤0.01% |
10,500
-1,900
| -15% | -$42.2K |
|
|
AL
4040
CALL
DELISTED
Air Lease Corp
AL
| $251K | ﹤0.01% |
6,000
+3,300
| +122% | +$131K |
|
4041
CALL
Compass Diversified
CODI
$777M
| $251K | ﹤0.01% |
11,600
-2,600
| -18% | -$51.6K |
|
|
PPLI
4042
CALL
People Inc
PPLI
$3.13B
| $251K | ﹤0.01% |
4,876
-4,267
| -47% | -$195K |
|
4043
Cemex
CX
$17.3B
| $250K | ﹤0.01% |
35,318
-64,350
| -65% | -$409K |
|
4044
CALL
Globus Medical
GMED
$10.9B
| $250K | ﹤0.01% |
4,200
-13,900
| -77% | -$792K |
|
4045
CALL
Gaotu Techedu
GOTU
$384M
| $250K | ﹤0.01% |
86,700
-27,400
| -24% | -$86.4K |
|
4046
CALL
RCI Hospitality Holdings
RICK
$203M
| $250K | ﹤0.01% |
3,300
+600
| +22% | +$45.1K |
|
4047
Teucrium Soybean Fund
SOYB
$62.3M
| $250K | ﹤0.01% |
+9,172
| New | +$240K |
|
|
TPH
4048
DELISTED
Tri Pointe Homes
TPH
| $250K | ﹤0.01% |
+7,624
| New | +$223K |
|
|
CVGW
4049
PUT
DELISTED
Calavo Growers
CVGW
| $249K | ﹤0.01% |
8,600
-47,100
| -85% | -$1.46M |
|
|
FFWM
4050
DELISTED
First Foundation Inc
FFWM
| $249K | ﹤0.01% |
+62,897
| New | +$324K |
|
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.