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 | |
|---|---|---|---|---|---|---|
5901
ProShares Ultra Euro
ULE
$4.4M
| $125K | ﹤0.01% |
9,441
+7,341
| +350% | +$99.4K |
|
|
SCPL
5902
DELISTED
SciPlay Corporation Class A Common Stock
SCPL
| $125K | ﹤0.01% |
9,075
-2,329
| -20% | -$41.7K |
|
5903
Akebia Therapeutics
AKBA
$354M
| $124K | ﹤0.01% |
+55,035
| New | +$150K |
|
5904
CALL
American States Water
AWR
$3.35B
| $124K | ﹤0.01% |
1,200
-3,300
| -73% | -$311K |
|
5905
CALL
Carlisle Companies
CSL
$15.3B
| $124K | ﹤0.01% |
500
+400
| +400% | +$91.9K |
|
5906
Deutsche Bank
DB
$70.4B
| $124K | ﹤0.01% |
9,939
-63,964
| -87% | -$815K |
|
5907
CALL
Extreme Networks
EXTR
$4.23B
| $124K | ﹤0.01% |
7,900
-9,000
| -53% | -$110K |
|
5908
PUT
LCI Industries
LCII
$2.6B
| $124K | ﹤0.01% |
800
+200
| +33% | +$29.8K |
|
5909
CALL
Manhattan Associates
MANH
$11B
| $124K | ﹤0.01% |
800
-4,200
| -84% | -$682K |
|
5910
PUT
MannKind Corp
MNKD
$1.22B
| $124K | ﹤0.01% |
28,600
-80,200
| -74% | -$371K |
|
|
RDHL
5911
Redhill Biopharma
RDHL
$3.94M
| $124K | ﹤0.01% |
48
+21
| +78% | +$84K |
|
5912
PUT
SCYNEXIS
SCYX
$53.6M
| $124K | ﹤0.01% |
2,550
+312
| +14% | +$15.3K |
|
5913
PUT
TaskUs
TASK
$599M
| $124K | ﹤0.01% |
+2,300
| New | +$125K |
|
5914
CALL
Voyager Therapeutics
VYGR
$189M
| $124K | ﹤0.01% |
46,000
+37,200
| +423% | +$127K |
|
5915
Cerus
CERS
$441M
| $123K | ﹤0.01% |
18,131
-9,140
| -34% | -$61.5K |
|
5916
CALL
Cytokinetics
CYTK
$10.7B
| $123K | ﹤0.01% |
2,700
+200
| +8% | +$7.72K |
|
5917
CALL
Full House Resorts
FLL
$82.7M
| $123K | ﹤0.01% |
10,200
-1,000
| -9% | -$10.8K |
|
5918
CALL
Grupo Aeroportuario Centro Norte
OMAB
$5.36B
| $123K | ﹤0.01% |
+2,300
| New | +$115K |
|
5919
PUT
PACCAR
PCAR
$71.6B
| $123K | ﹤0.01% |
2,100
-2,700
| -56% | -$156K |
|
5920
Tiptree Inc
TIPT
$665M
| $123K | ﹤0.01% |
8,907
-34,384
| -79% | -$482K |
|
|
SLGC
5921
CALL
DELISTED
SomaLogic, Inc. Class A Common Stock
SLGC
| $123K | ﹤0.01% |
+10,600
| New | +$127K |
|
|
BWAC
5922
DELISTED
BETTER WORLD ACQUISITION CORP. Common Stock
BWAC
| $123K | ﹤0.01% |
+12,171
| New | +$123K |
|
|
RBAC
5923
PUT
DELISTED
RedBall Acquisition Corp.
RBAC
| $123K | ﹤0.01% |
12,400
+3,100
| +33% | +$31K |
|
|
VWTR
5924
PUT
DELISTED
Vidler Water Resouces, Inc. Common Stock
VWTR
| $123K | ﹤0.01% |
10,200
-16,800
| -62% | -$203K |
|
5925
CALL
Crane NXT
CXT
$3.15B
| $122K | ﹤0.01% |
3,455
+3,167
| +1,100% | +$110K |
|
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.