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 | |
|---|---|---|---|---|---|---|
2326
PUT
Fidelity National Financial
FNF
$13.9B
| $1.33M | ﹤0.01% |
37,000
+27,200
| +278% | +$949K |
|
2327
CALL
MINISO
MNSO
$3.64B
| $1.33M | ﹤0.01% |
78,400
+58,900
| +302% | +$983K |
|
2328
CALL
Huntington Bancshares
HBAN
$35.1B
| $1.33M | ﹤0.01% |
123,300
-275,500
| -69% | -$2.94M |
|
2329
PUT
Lifecore Biomedical
LFCR
$162M
| $1.33M | ﹤0.01% |
137,500
+134,100
| +3,944% | +$819K |
|
2330
CALL
Booz Allen Hamilton
BAH
$8.7B
| $1.33M | ﹤0.01% |
11,900
| – | – |
|
2331
CALL
Dentsply Sirona
XRAY
$2.59B
| $1.33M | ﹤0.01% |
33,200
+1,100
| +3% | +$43.7K |
|
2332
CALL
Western Midstream Partners
WES
$19.6B
| $1.33M | ﹤0.01% |
50,000
+16,600
| +50% | +$437K |
|
2333
PUT
Factset
FDS
$9.05B
| $1.32M | ﹤0.01% |
3,300
+300
| +10% | +$121K |
|
2334
iShares Expanded Tech-Software Sector ETF
IGV
$13B
| $1.32M | ﹤0.01% |
19,105
+18,105
| +1,811% | +$1.14M |
|
2335
SiTime
SITM
$16.6B
| $1.32M | ﹤0.01% |
+11,199
| New | +$1.22M |
|
|
DAY
2336
CALL
DELISTED
Dayforce
DAY
| $1.32M | ﹤0.01% |
19,700
-127,300
| -87% | -$8.19M |
|
2337
PUT
Concentrix
CNXC
$1.36B
| $1.32M | ﹤0.01% |
16,300
-25,000
| -61% | -$2.34M |
|
2338
PUT
Elbit Systems
ESLT
$38.4B
| $1.32M | ﹤0.01% |
+6,300
| New | +$1.22M |
|
2339
PUT
Getty Images
GETY
$184M
| $1.32M | ﹤0.01% |
269,700
-36,900
| -12% | -$211K |
|
2340
Sibanye-Stillwater
SBSW
$5.92B
| $1.31M | ﹤0.01% |
210,786
-86,102
| -29% | -$679K |
|
2341
CALL
Fluor
FLR
$7.29B
| $1.31M | ﹤0.01% |
44,400
-98,900
| -69% | -$2.84M |
|
2342
PUT
Public Service Enterprise Group
PEG
$39.8B
| $1.31M | ﹤0.01% |
21,000
+16,100
| +329% | +$1.01M |
|
2343
CALL
Papa John's
PZZA
$999M
| $1.31M | ﹤0.01% |
17,800
-12,400
| -41% | -$920K |
|
|
HBI
2344
CALL
DELISTED
Hanesbrands
HBI
| $1.31M | ﹤0.01% |
289,400
+93,400
| +48% | +$427K |
|
|
SBOW
2345
PUT
DELISTED
SilverBow Resources, Inc.
SBOW
| $1.31M | ﹤0.01% |
45,100
-22,000
| -33% | -$544K |
|
2346
CALL
National Grid
NGG
$82.7B
| $1.31M | ﹤0.01% |
20,693
-60,169
| -74% | -$3.95M |
|
2347
PUT
TFI International
TFII
$12.4B
| $1.31M | ﹤0.01% |
11,500
-31,800
| -73% | -$3.49M |
|
2348
CALL
ICICI Bank
IBN
$106B
| $1.31M | ﹤0.01% |
56,600
+14,000
| +33% | +$317K |
|
2349
PUT
AllianceBernstein
AB
$3.47B
| $1.3M | ﹤0.01% |
40,600
-96,100
| -70% | -$3.29M |
|
2350
Match Group
MTCH
$8.84B
| $1.3M | ﹤0.01% |
+31,150
| New | +$1.14M |
|
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.