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 | |
|---|---|---|---|---|---|---|
5301
PUT
Angi Inc
ANGI
$229M
| $186K | ﹤0.01% |
2,020
-610
| -23% | -$66K |
|
5302
CALL
C4 Therapeutics
CCCC
$385M
| $186K | ﹤0.01% |
+5,800
| New | +$229K |
|
5303
CALL
Gladstone Investment Corp
GAIN
$643M
| $186K | ﹤0.01% |
10,900
+5,800
| +114% | +$92.5K |
|
5304
CALL
Kilroy Realty
KRC
$4.52B
| $186K | ﹤0.01% |
2,800
-7,100
| -72% | -$485K |
|
5305
CALL
Polaris
PII
$3.82B
| $186K | ﹤0.01% |
1,700
-28,000
| -94% | -$3.3M |
|
5306
SkyWater Technology
SKYT
| $186K | ﹤0.01% |
+11,497
| New | +$257K |
|
5307
Aterian
ATER
$4.45M
| $185K | ﹤0.01% |
+3,763
| New | +$278K |
|
5308
BlackSky Technology
BKSY
$943M
| $185K | ﹤0.01% |
+5,174
| New | +$353K |
|
5309
Edgewell Personal Care
EPC
$1.25B
| $185K | ﹤0.01% |
4,056
+333
| +9% | +$13.4K |
|
5310
Lexicon Pharmaceuticals
LXRX
$1.03B
| $185K | ﹤0.01% |
47,145
-12,129
| -20% | -$58.9K |
|
5311
Invesco NASDAQ 100 ETF
QQQM
$96.7B
| $185K | ﹤0.01% |
1,136
+842
| +286% | +$134K |
|
|
SEM
5312
CALL
DELISTED
Select Medical
SEM
| $185K | ﹤0.01% |
11,693
-17,817
| -60% | -$304K |
|
5313
Brookdale Senior Living
BKD
$3.49B
| $184K | ﹤0.01% |
35,785
+15,043
| +73% | +$93.8K |
|
5314
Lakeland Industries
LAKE
$113M
| $184K | ﹤0.01% |
8,518
-12,840
| -60% | -$263K |
|
5315
NNN REIT
NNN
$9.04B
| $184K | ﹤0.01% |
3,831
-28,392
| -88% | -$1.3M |
|
|
GRTX
5316
CALL
DELISTED
Galera Therapeutics, Inc. Common Stock
GRTX
| $184K | ﹤0.01% |
+40,200
| New | +$133K |
|
|
MILE
5317
PUT
DELISTED
Metromile, Inc. Common Stock
MILE
| $184K | ﹤0.01% |
84,100
+48,800
| +138% | +$139K |
|
|
MNR
5318
PUT
DELISTED
Monmouth Real Estate Investment Corp
MNR
| $184K | ﹤0.01% |
8,800
+6,400
| +267% | +$129K |
|
|
CCRN
5319
DELISTED
Cross Country Healthcare
CCRN
| $183K | ﹤0.01% |
+6,614
| New | +$160K |
|
5320
CALL
Gray Television
GTN
$415M
| $183K | ﹤0.01% |
9,100
-6,200
| -41% | -$137K |
|
5321
CALL
Plains GP Holdings
PAGP
$5.21B
| $183K | ﹤0.01% |
18,100
-84,200
| -82% | -$907K |
|
5322
Deckers Outdoor
DECK
$13.2B
| $182K | ﹤0.01% |
+2,988
| New | +$193K |
|
5323
PUT
St. Joe Company
JOE
$3.54B
| $182K | ﹤0.01% |
3,500
-3,600
| -51% | -$175K |
|
5324
PUT
NewtekOne
NEWT
$428M
| $182K | ﹤0.01% |
6,600
-5,300
| -45% | -$155K |
|
5325
PUT
Owlet
OWLT
$149M
| $182K | ﹤0.01% |
+4,879
| New | +$260K |
|
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.