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 | |
|---|---|---|---|---|---|---|
|
GRMN
3051
Garmin
GRMN
$46.8B
| $639K | ﹤0.01% |
6,133
-3,843
| -39% | -$393K |
|
3052
PUT
Companhia Siderúrgica Nacional
SID
$1.49B
| $638K | ﹤0.01% |
246,700
+90,700
| +58% | +$250K |
|
|
SJT
3053
CALL
San Juan Basin Royalty Trust
SJT
$118M
| $638K | ﹤0.01% |
85,900
-5,100
| -6% | -$43.3K |
|
3054
CALL
Vanguard FTSE Developed Markets ETF
VEA
$227B
| $637K | ﹤0.01% |
13,800
-11,600
| -46% | -$534K |
|
|
GOL
3055
CALL
DELISTED
Gol Linhas Aéreas Inteligentes S.A. American Depositary Shares (Each representing Ten Preferred Shares)
GOL
| $637K | ﹤0.01% |
116,700
+103,100
| +758% | +$349K |
|
3056
CALL
Costamare
CMRE
$1.89B
| $636K | ﹤0.01% |
65,800
-30,500
| -32% | -$273K |
|
3057
PUT
Agilon Health
AGL
$1.64B
| $634K | ﹤0.01% |
1,464
-2,240
| -60% | -$1.26M |
|
3058
PUT
Ardelyx
ARDX
$1.25B
| $634K | ﹤0.01% |
187,200
+114,400
| +157% | +$469K |
|
3059
PUT
Braze
BRZE
$2.65B
| $634K | ﹤0.01% |
14,500
+5,400
| +59% | +$184K |
|
3060
PUT
ImmunityBio
IBRX
$7.32B
| $634K | ﹤0.01% |
228,300
+150,000
| +192% | +$424K |
|
|
ICPT
3061
CALL
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $633K | ﹤0.01% |
57,300
-1,100
| -2% | -$15.3K |
|
3062
CALL
BJ's Restaurants
BJRI
$1.45B
| $632K | ﹤0.01% |
19,900
+13,500
| +211% | +$411K |
|
3063
Flowserve
FLS
$9.29B
| $632K | ﹤0.01% |
17,039
-6,725
| -28% | -$233K |
|
3064
PUT
Fiverr
FVRR
$398M
| $632K | ﹤0.01% |
24,300
+3,200
| +15% | +$96.4K |
|
3065
CALL
Ameriprise Financial
AMP
$47.6B
| $631K | ﹤0.01% |
1,900
-3,500
| -65% | -$1.08M |
|
3066
CALL
Vanguard Total Bond Market
BND
$158B
| $631K | ﹤0.01% |
8,800
+2,600
| +42% | +$190K |
|
3067
CALL
Healthcare Realty
HR
$7.46B
| $631K | ﹤0.01% |
33,500
+20,000
| +148% | +$386K |
|
|
PPLI
3068
PUT
People Inc
PPLI
$3.15B
| $628K | ﹤0.01% |
12,190
-31,450
| -72% | -$1.44M |
|
3069
CALL
Canadian Imperial Bank of Commerce
CM
$108B
| $627K | ﹤0.01% |
14,700
-204,900
| -93% | -$8.66M |
|
3070
PUT
Genco Shipping & Trading
GNK
$1.09B
| $627K | ﹤0.01% |
44,700
+33,500
| +299% | +$482K |
|
3071
CALL
Vroom Inc
VRM
$37.5M
| $627K | ﹤0.01% |
5,451
-24
| -0.4% | -$1.83K |
|
3072
PUT
Fluence Energy
FLNC
$1.79B
| $626K | ﹤0.01% |
23,500
-3,000
| -11% | -$67.1K |
|
3073
PUT
Hims & Hers Health
HIMS
$7B
| $626K | ﹤0.01% |
66,700
+47,100
| +240% | +$467K |
|
3074
PUT
International Paper
IP
$22.5B
| $626K | ﹤0.01% |
19,700
-77,400
| -80% | -$2.54M |
|
3075
CALL
Signet Jewelers
SIG
$3.72B
| $626K | ﹤0.01% |
9,600
+6,200
| +182% | +$429K |
|
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.