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 | |
|---|---|---|---|---|---|---|
1801
PUT
Schwab US Broad Market ETF
SCHB
$42.8B
| $2.49M | ﹤0.01% |
104,100
-42,600
| -29% | -$694K |
|
1802
MaxLinear
MXL
$6.49B
| $2.48M | ﹤0.01% |
+78,618
| New | +$2.27M |
|
|
DM
1803
DELISTED
Desktop Metal, Inc.
DM
| $2.48M | ﹤0.01% |
140,204
+27,675
| +25% | +$555K |
|
1804
PUT
Lear
LEA
$7.19B
| $2.47M | ﹤0.01% |
17,200
+11,300
| +192% | +$1.49M |
|
|
CPE
1805
CALL
DELISTED
Callon Petroleum Company
CPE
| $2.47M | ﹤0.01% |
70,400
-25,700
| -27% | -$860K |
|
1806
ProShares UltraPro S&P 500
UPRO
$5.1B
| $2.46M | ﹤0.01% |
+51,950
| New | +$2.12M |
|
1807
CALL
Axcelis
ACLS
$4.12B
| $2.46M | ﹤0.01% |
13,400
+8,300
| +163% | +$1.19M |
|
1808
CALL
Blink Charging
BLNK
$75.2M
| $2.46M | ﹤0.01% |
410,100
+197,300
| +93% | +$1.37M |
|
1809
Bath & Body Works
BBWI
$4.01B
| $2.45M | ﹤0.01% |
65,460
+47,067
| +256% | +$1.72M |
|
1810
Doximity
DOCS
$3.67B
| $2.45M | ﹤0.01% |
+72,079
| New | +$2.4M |
|
1811
Paychex
PAYX
$40.4B
| $2.45M | ﹤0.01% |
21,923
+16,436
| +300% | +$1.8M |
|
|
SPWR
1812
PUT
DELISTED
SunPower Corporation Common Stock
SPWR
| $2.45M | ﹤0.01% |
250,200
+83,000
| +50% | +$969K |
|
|
LAC
1813
PUT
DELISTED
Lithium Americas Corp. Common Shares
LAC
| $2.44M | ﹤0.01% |
120,800
+5,200
| +4% | +$107K |
|
1814
PUT
Welltower
WELL
$178B
| $2.43M | ﹤0.01% |
30,100
-16,300
| -35% | -$1.26M |
|
1815
KB Home
KBH
$3.48B
| $2.42M | ﹤0.01% |
+46,827
| New | +$2.11M |
|
1816
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$247M
| $2.42M | ﹤0.01% |
+79,736
| New | +$2.33M |
|
1817
PUT
Perion Network
PERI
$367M
| $2.42M | ﹤0.01% |
78,900
+700
| +0.9% | +$24K |
|
1818
CALL
Campbell Soup
CPB
$6.51B
| $2.42M | ﹤0.01% |
52,900
+4,100
| +8% | +$211K |
|
1819
PUT
Oneok
OKE
$58.7B
| $2.41M | ﹤0.01% |
39,000
+5,400
| +16% | +$334K |
|
1820
PUT
LKQ Corp
LKQ
$6.58B
| $2.41M | ﹤0.01% |
41,300
-64,700
| -61% | -$3.6M |
|
1821
CALL
Baker Hughes
BKR
$56.8B
| $2.4M | ﹤0.01% |
76,100
-48,900
| -39% | -$1.43M |
|
1822
PUT
Hertz
HTZ
$572M
| $2.4M | ﹤0.01% |
130,800
-285,800
| -69% | -$4.68M |
|
1823
PUT
Entegris
ENTG
$19.7B
| $2.4M | ﹤0.01% |
21,700
+10,500
| +94% | +$957K |
|
1824
CALL
Lumen
LUMN
$6.53B
| $2.4M | ﹤0.01% |
1,063,700
-448,000
| -30% | -$987K |
|
1825
CALL
Semtech
SMTC
$11.7B
| $2.4M | ﹤0.01% |
94,100
+92,700
| +6,621% | +$2M |
|
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.