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 | |
|---|---|---|---|---|---|---|
1526
PUT
Lumen
LUMN
$6.53B
| $3.41M | ﹤0.01% |
272,100
-84,900
| -24% | -$1.08M |
|
|
P
1527
CALL
Everpure Inc
P
$24.8B
| $3.41M | ﹤0.01% |
104,900
-15,400
| -13% | -$447K |
|
|
UNIT
1528
CALL
Uniti Group
UNIT
$2.63B
| $3.4M | ﹤0.01% |
242,800
+193,200
| +390% | +$2.57M |
|
1529
D.R. Horton
DHI
$41B
| $3.4M | ﹤0.01% |
31,358
+12,495
| +66% | +$1.2M |
|
1530
CALL
Xcel Energy
XEL
$51B
| $3.4M | ﹤0.01% |
50,200
+29,900
| +147% | +$1.95M |
|
1531
Southern Company
SO
$110B
| $3.39M | ﹤0.01% |
49,500
+38,761
| +361% | +$2.47M |
|
1532
CALL
Interactive Brokers
IBKR
$40.9B
| $3.39M | ﹤0.01% |
170,800
+26,400
| +18% | +$491K |
|
1533
Opendoor
OPEN
$3.7B
| $3.39M | ﹤0.01% |
239,874
+46,397
| +24% | +$857K |
|
1534
PUT
Unilever
UL
$131B
| $3.38M | ﹤0.01% |
55,911
+6,044
| +12% | +$359K |
|
|
SGI
1535
CALL
Somnigroup International
SGI
$15.1B
| $3.38M | ﹤0.01% |
71,900
+17,500
| +32% | +$793K |
|
1536
PUT
Canadian National Railway
CNI
$78.3B
| $3.38M | ﹤0.01% |
27,500
-50,100
| -65% | -$6.35M |
|
1537
CALL
Bakkt Inc
BKKT
$333M
| $3.37M | ﹤0.01% |
15,844
+12,356
| +354% | +$5.1M |
|
1538
ZIM Integrated Shipping Services
ZIM
$3B
| $3.37M | ﹤0.01% |
57,192
+32,035
| +127% | +$1.64M |
|
1539
CALL
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $3.37M | ﹤0.01% |
41,300
-9,600
| -19% | -$793K |
|
1540
FirstEnergy
FE
$28.9B
| $3.36M | ﹤0.01% |
+80,775
| New | +$3.11M |
|
|
SWCH
1541
CALL
DELISTED
Switch, Inc. Class A Common Stock
SWCH
| $3.35M | ﹤0.01% |
117,100
-8,400
| -7% | -$219K |
|
1542
Philip Morris
PM
$301B
| $3.35M | ﹤0.01% |
35,274
+33,078
| +1,506% | +$3.09M |
|
1543
CALL
GlobalFoundries
GFS
$29.4B
| $3.35M | ﹤0.01% |
+51,500
| New | +$3.2M |
|
1544
PUT
Keysight
KEYS
$54.5B
| $3.35M | ﹤0.01% |
16,200
-53,300
| -77% | -$9.97M |
|
|
MTTR
1545
PUT
DELISTED
Matterport, Inc. Class A Common Stock
MTTR
| $3.35M | ﹤0.01% |
+162,100
| New | +$3.71M |
|
|
OTLY
1546
CALL
Oatly Group
OTLY
$417M
| $3.34M | ﹤0.01% |
20,980
+16,915
| +416% | +$3.74M |
|
1547
Tapestry
TPR
$28.8B
| $3.33M | ﹤0.01% |
82,107
+38,022
| +86% | +$1.56M |
|
|
MPT
1548
PUT
Medical Properties Trust
MPT
$2.89B
| $3.33M | ﹤0.01% |
140,800
+52,900
| +60% | +$1.13M |
|
1549
CALL
EQT Corp
EQT
$33.2B
| $3.31M | ﹤0.01% |
151,600
+47,900
| +46% | +$1M |
|
|
AUY
1550
PUT
DELISTED
Yamana Gold, Inc.
AUY
| $3.31M | ﹤0.01% |
783,300
+381,400
| +95% | +$1.58M |
|
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.