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 | |
|---|---|---|---|---|---|---|
|
LUNA
5201
CALL
DELISTED
Luna Innovations Incorporated
LUNA
| $200K | ﹤0.01% |
23,700
+6,500
| +38% | +$58.3K |
|
5202
AST SpaceMobile
ASTS
$17.6B
| $199K | ﹤0.01% |
25,153
-74,362
| -75% | -$763K |
|
5203
CALL
Boise Cascade
BCC
$2.69B
| $199K | ﹤0.01% |
2,800
-14,500
| -84% | -$935K |
|
5204
CALL
Commault Systems
CVLT
$4.88B
| $199K | ﹤0.01% |
2,900
-29,000
| -91% | -$1.98M |
|
5205
Global X Autonomous & Electric Vehicles ETF
DRIV
$377M
| $199K | ﹤0.01% |
6,537
-32,785
| -83% | -$985K |
|
5206
CALL
Lineage Cell Therapeutics
LCTX
$269M
| $199K | ﹤0.01% |
81,600
+58,200
| +249% | +$136K |
|
5207
CALL
Ranpak Holdings
PACK
$439M
| $199K | ﹤0.01% |
5,300
+3,900
| +279% | +$138K |
|
|
SAGE
5208
CALL
DELISTED
Sage Therapeutics
SAGE
| $199K | ﹤0.01% |
4,700
-11,600
| -71% | -$486K |
|
5209
CALL
InfraCap MLP ETF
AMZA
$470M
| $198K | ﹤0.01% |
7,700
+800
| +12% | +$21.3K |
|
5210
PUT
Castor Maritime
CTRM
$18.8M
| $198K | ﹤0.01% |
13,950
+13,190
| +1,736% | +$271K |
|
5211
PUT
Nordic American Tanker
NAT
$1.38B
| $198K | ﹤0.01% |
117,500
+8,900
| +8% | +$19.1K |
|
|
TBCH
5212
Turtle Beach Corp
TBCH
$243M
| $198K | ﹤0.01% |
+8,920
| New | +$241K |
|
|
SFT
5213
PUT
DELISTED
Shift Technologies, Inc. Class A Common Stock
SFT
| $198K | ﹤0.01% |
5,810
-6,650
| -53% | -$364K |
|
5214
CALL
Smartbird Inc
BIRD
$19.5M
| $197K | ﹤0.01% |
+655
| New | +$245K |
|
|
SF
5215
PUT
Stifel
SF
$12.6B
| $197K | ﹤0.01% |
4,200
-11,850
| -74% | -$575K |
|
5216
Thomson Reuters
TRI
$42.8B
| $197K | ﹤0.01% |
1,567
-17,045
| -92% | -$2.12M |
|
5217
PUT
Utz Brands
UTZ
$1.25B
| $197K | ﹤0.01% |
12,400
-400
| -3% | -$6.37K |
|
5218
CALL
Valvoline
VVV
$4.9B
| $197K | ﹤0.01% |
5,300
+100
| +2% | +$3.49K |
|
|
BFX
5219
CALL
DELISTED
BowFlex Inc.
BFX
| $197K | ﹤0.01% |
32,300
-19,700
| -38% | -$163K |
|
5220
CALL
Associated Banc-Corp
ASB
$5.83B
| $196K | ﹤0.01% |
8,700
-47,500
| -85% | -$1.07M |
|
5221
CALL
BJ's Restaurants
BJRI
$1.42B
| $196K | ﹤0.01% |
5,700
-800
| -12% | -$28.5K |
|
|
DESP
5222
DELISTED
Despegar.com
DESP
| $196K | ﹤0.01% |
+20,071
| New | +$221K |
|
|
DNB
5223
PUT
DELISTED
Dun & Bradstreet
DNB
| $196K | ﹤0.01% |
9,600
-25,400
| -73% | -$483K |
|
5224
PUT
Evolent Health
EVH
$348M
| $196K | ﹤0.01% |
7,100
+200
| +3% | +$5.74K |
|
5225
Gaotu Techedu
GOTU
$434M
| $196K | ﹤0.01% |
101,413
+98,982
| +4,072% | +$276K |
|
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.