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 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$42.6M |
| 2 |
Shopify
SHOP
|
+$39.6M |
| 3 |
iShares China Large-Cap ETF
FXI
|
+$35.4M |
| 4 |
Verizon
VZ
|
+$34.1M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$34.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
AMC Entertainment Holdings
AMC
|
+$49.5M |
| 2 |
GE Aerospace
GE
|
+$35.2M |
| 3 |
Carnival Corporation Ltd
CCL
|
+$30.5M |
| 4 |
Advanced Micro Devices
AMD
|
+$28.8M |
| 5 |
Micron Technology
MU
|
+$23.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.61% |
| 2 | Consumer Discretionary | 0.43% |
| 3 | Healthcare | 0.35% |
| 4 | Communication Services | 0.23% |
| 5 | Financials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
10226
CALL
Rigetti Computing
RGTI
$4.7B
| $1K | ﹤0.01% |
+100
| New | +$1.04K |
|
10227
Construction Partners
ROAD
$5.84B
| $1K | ﹤0.01% |
68
-17,871
| -100% | -$624K |
|
10228
PUT
Riverview Bancorp
RVSB
$107M
| $1K | ﹤0.01% |
200
-44,100
| -100% | -$335K |
|
|
SANW
10229
CALL
DELISTED
S&W Seed Co
SANW
| $1K | ﹤0.01% |
+32
| New | +$1.87K |
|
|
SCS
10230
PUT
DELISTED
Steelcase
SCS
| $1K | ﹤0.01% |
100
-34,900
| -100% | -$421K |
|
10231
CALL
SES AI
SES
$186M
| $1K | ﹤0.01% |
+11,900
| New | +$121K |
|
|
10232
SES AI
SES
$186M
| $1K | ﹤0.01% |
+198
| New | +$2.02K |
|
10233
CALL
Star Group
SGU
$428M
| $1K | ﹤0.01% |
100
-100
| -50% | -$1.07K |
|
|
SHYF
10234
DELISTED
The Shyft Group
SHYF
| $1K | ﹤0.01% |
+38
| New | +$1.74K |
|
10235
CALL
Siebert Financial
SIEB
$68M
| $1K | ﹤0.01% |
800
-5,400
| -87% | -$15.6K |
|
10236
PUT
SiriusPoint
SPNT
$2.98B
| $1K | ﹤0.01% |
+200
| New | +$1.76K |
|
10237
CALL
E.W. Scripps
SSP
$274M
| $1K | ﹤0.01% |
100
-11,700
| -99% | -$226K |
|
10238
PUT
Sutro Biopharma
STRO
$379M
| $1K | ﹤0.01% |
+10
| New | +$1.79K |
|
|
SY
10239
PUT
So-Young International
SY
$194M
| $1K | ﹤0.01% |
500
-1,500
| -75% | -$5.94K |
|
10240
PUT
Sypris Solutions
SYPR
$43.7M
| $1K | ﹤0.01% |
800
+100
| +14% | +$323 |
|
10241
PUT
Tredegar Corp
TG
$268M
| $1K | ﹤0.01% |
100
-3,500
| -97% | -$42.2K |
|
10242
CALL
Team
TISI
$77.7M
| $1K | ﹤0.01% |
120
-340
| -74% | -$6.79K |
|
|
10243
Team
TISI
$77.7M
| $1K | ﹤0.01% |
101
-167
| -62% | -$3.33K |
|
|
10244
PUT
Team
TISI
$77.7M
| $1K | ﹤0.01% |
100
| – | – |
|
10245
CALL
Telos
TLS
$337M
| $1K | ﹤0.01% |
100
-24,000
| -100% | -$511K |
|
|
TOKE
10246
DELISTED
Cambria Cannabis ETF
TOKE
| $1K | ﹤0.01% |
+157
| New | +$2.09K |
|
10247
Tortoise North American Pipeline ETF
TPYP
$900M
| $1K | ﹤0.01% |
+86
| New | +$1.95K |
|
10248
PUT
Trinity Capital
TRIN
$1.55B
| $1K | ﹤0.01% |
+100
| New | +$1.66K |
|
|
TUYA
10249
CALL
Tuya Inc
TUYA
$1.01B
| $1K | ﹤0.01% |
+300
| New | +$2.04K |
|
|
TUYA
10250
PUT
Tuya Inc
TUYA
$1.01B
| $1K | ﹤0.01% |
+300
| New | +$2.04K |
|
Similar funds
Simplex Trading's Q4 2021 Portfolio in Review
As of Q4 2021, Simplex Trading held 12,077 positions worth $99B, down 7.5% from $107B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading withdrew a net $10.8B in Q4 2021, closing 1,645 positions and reducing 4,258 holdings. Its most notable exit was Carnival Corporation Ltd, an estimated $30.5M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.61% of assets, up from 0.49% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares China Large-Cap ETF worth $33M.
- Simplex Trading's largest Q4 2021 buy was iShares China Large-Cap ETF: 902,666 shares worth $33M.
- Simplex Trading added most to State Street Financial Select Sector SPDR ETF in Q4 2021, an estimated $42.6M increase.
- Simplex Trading's biggest Q4 2021 reduction was AMC Entertainment Holdings, cutting an estimated $49.5M.
- Simplex Trading fully exited Carnival Corporation Ltd in Q4 2021, selling an estimated $30.5M.
- Simplex Trading's ten largest holdings make up 33% of its $99B portfolio in Q4 2021.
- Simplex Trading opened 2,269 new positions and closed 1,645 in Q4 2021.
- Simplex Trading's portfolio value fell 7.5% quarter-over-quarter to $99B.
Based on Simplex Trading's 13F filing for Q4 2021, filed 4 Feb 2022.