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 | |
|---|---|---|---|---|---|---|
|
FRC
2801
PUT
DELISTED
First Republic Bank
FRC
| $812K | ﹤0.01% |
1,476,900
-1,996,500
| -57% | -$24.4M |
|
2802
CALL
FuelCell Energy
FCEL
$1.67B
| $810K | ﹤0.01% |
12,503
-1,637
| -12% | -$111K |
|
2803
CALL
Pinnacle Financial Partners Inc
PNFP
$15.6B
| $810K | ﹤0.01% |
+14,300
| New | +$753K |
|
2804
SentinelOne
S
$6.28B
| $810K | ﹤0.01% |
+53,706
| New | +$908K |
|
2805
CALL
Nabors Industries
NBR
$1.19B
| $809K | ﹤0.01% |
8,700
+2,200
| +34% | +$224K |
|
2806
T. Rowe Price
TROW
$25.4B
| $809K | ﹤0.01% |
7,225
+4,065
| +129% | +$445K |
|
2807
CALL
Ameren
AEE
$31.2B
| $808K | ﹤0.01% |
9,900
+9,500
| +2,375% | +$814K |
|
2808
CALL
ResMed
RMD
$29.4B
| $808K | ﹤0.01% |
3,700
+3,100
| +517% | +$691K |
|
2809
JFrog
FROG
$9.87B
| $807K | ﹤0.01% |
29,168
+22,017
| +308% | +$503K |
|
2810
PUT
WillScot Mobile Mini Holdings
WSC
$4.82B
| $807K | ﹤0.01% |
16,900
+5,200
| +44% | +$233K |
|
2811
PUT
Invesco DB Base Metals Fund
DBB
$308M
| $806K | ﹤0.01% |
40,100
+2,200
| +6% | +$41.1K |
|
2812
CALL
Repligen
RGEN
$7.45B
| $806K | ﹤0.01% |
5,700
-5,800
| -50% | -$930K |
|
2813
NextDecade
NEXT
$1.78B
| $804K | ﹤0.01% |
98,003
+46,060
| +89% | +$283K |
|
2814
PUT
Black Stone Minerals
BSM
$3.17B
| $803K | ﹤0.01% |
50,400
+11,000
| +28% | +$176K |
|
2815
PUT
Canadian Imperial Bank of Commerce
CM
$108B
| $802K | ﹤0.01% |
18,800
-112,100
| -86% | -$4.74M |
|
2816
CALL
Axalta
AXTA
$7.18B
| $800K | ﹤0.01% |
24,400
+20,900
| +597% | +$649K |
|
2817
PUT
SKYX Platforms
SKYX
$153M
| $799K | ﹤0.01% |
300,400
-300
| -0.1% | -$963 |
|
2818
PUT
iShares Core Dividend ETF
DIVB
$1.67B
| $797K | ﹤0.01% |
22,600
+22,500
| +22,500% | +$835K |
|
2819
PUT
Flowserve
FLS
$9.13B
| $795K | ﹤0.01% |
21,400
-700
| -3% | -$24.3K |
|
2820
PUT
Guardant Health
GH
$19.3B
| $794K | ﹤0.01% |
22,200
-15,100
| -40% | -$434K |
|
2821
CALL
United Therapeutics
UTHR
$26.6B
| $794K | ﹤0.01% |
3,600
+400
| +13% | +$88.6K |
|
2822
CALL
Packaging Corp of America
PKG
$22.4B
| $792K | ﹤0.01% |
6,000
-2,200
| -27% | -$294K |
|
|
ISEE
2823
DELISTED
IVERIC bio, Inc. Common Stock
ISEE
| $792K | ﹤0.01% |
20,138
-43,467
| -68% | -$1.53M |
|
2824
CALL
Hims & Hers Health
HIMS
$6.85B
| $790K | ﹤0.01% |
84,100
+44,200
| +111% | +$438K |
|
|
GES
2825
PUT
DELISTED
Guess Inc
GES
| $789K | ﹤0.01% |
40,600
+30,500
| +302% | +$587K |
|
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.