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 | |
|---|---|---|---|---|---|---|
3201
PUT
Autohome
ATHM
$2.46B
| $554K | ﹤0.01% |
19,000
-18,500
| -49% | -$552K |
|
3202
PUT
SK Telecom
SKM
$13.5B
| $554K | ﹤0.01% |
28,400
+9,400
| +49% | +$192K |
|
3203
iShares MSCI Hong Kong ETF
EWH
$1.23B
| $553K | ﹤0.01% |
28,653
+24,087
| +528% | +$484K |
|
|
VRNT
3204
CALL
DELISTED
Verint Systems
VRNT
| $553K | ﹤0.01% |
15,800
+1,300
| +9% | +$46.8K |
|
3205
Arvinas
ARVN
$530M
| $551K | ﹤0.01% |
22,213
+19,036
| +599% | +$490K |
|
3206
PUT
Brookfield Infrastructure
BIPC
$5.03B
| $551K | ﹤0.01% |
12,100
+10,400
| +612% | +$472K |
|
3207
PUT
Carter's
CRI
$1.43B
| $551K | ﹤0.01% |
7,600
+5,800
| +322% | +$392K |
|
3208
CALL
LiveWire
LVWR
$498M
| $550K | ﹤0.01% |
46,600
-7,500
| -14% | -$62.4K |
|
3209
PUT
Axos Financial
AX
$5.45B
| $548K | ﹤0.01% |
13,900
-79,100
| -85% | -$3.07M |
|
3210
Sigma Lithium
SGML
$1.12B
| $548K | ﹤0.01% |
13,615
+2,878
| +27% | +$110K |
|
3211
PUT
Mohawk Industries
MHK
$7.05B
| $546K | ﹤0.01% |
5,300
+3,400
| +179% | +$333K |
|
3212
CALL
Algonquin Power & Utilities
AQN
$4.63B
| $545K | ﹤0.01% |
66,000
+20,500
| +45% | +$174K |
|
3213
IonQ
IONQ
$13.4B
| $545K | ﹤0.01% |
40,334
-18,320
| -31% | -$152K |
|
3214
iShares Russell 2000 Growth ETF
IWO
$14.4B
| $545K | ﹤0.01% |
2,250
+1,450
| +181% | +$332K |
|
3215
PUT
Nextpower Inc
NXT
$15.7B
| $545K | ﹤0.01% |
13,700
+13,300
| +3,325% | +$488K |
|
3216
CALL
Smith & Wesson
SWBI
$666M
| $545K | ﹤0.01% |
41,800
+7,800
| +23% | +$95.1K |
|
3217
Tidewater
TDW
$3.91B
| $545K | ﹤0.01% |
9,841
-11,937
| -55% | -$547K |
|
3218
iShares Expanded Tech Sector ETF
IGM
$9.92B
| $544K | ﹤0.01% |
8,322
+7,020
| +539% | +$417K |
|
3219
Radware
RDWR
$1.23B
| $544K | ﹤0.01% |
28,091
+21,441
| +322% | +$429K |
|
3220
Scorpio Tankers
STNG
$3.9B
| $544K | ﹤0.01% |
+11,524
| New | +$570K |
|
3221
CALL
Travel + Leisure Co
TNL
$4.68B
| $544K | ﹤0.01% |
13,500
+10,300
| +322% | +$397K |
|
3222
PUT
Carlyle Secured Lending
CGBD
$710M
| $543K | ﹤0.01% |
37,300
+28,100
| +305% | +$391K |
|
3223
CALL
Pitney Bowes
PBI
$2.46B
| $543K | ﹤0.01% |
153,400
+20,000
| +15% | +$69.3K |
|
3224
Perion Network
PERI
$371M
| $543K | ﹤0.01% |
17,731
-1,024
| -5% | -$35.2K |
|
3225
Frontline
FRO
$8.59B
| $542K | ﹤0.01% |
+37,327
| New | +$558K |
|
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.