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 | |
|---|---|---|---|---|---|---|
|
SRNE
1201
CALL
DELISTED
Sorrento Therapeutics, Inc.
SRNE
| $5.01M | 0.01% |
1,077,500
+457,500
| +74% | +$2.84M |
|
1202
PUT
Danaos Corp
DAC
$2.55B
| $5.01M | 0.01% |
67,100
+37,100
| +124% | +$2.68M |
|
1203
CALL
FirstEnergy
FE
$28.9B
| $5.01M | 0.01% |
120,400
-119,100
| -50% | -$4.59M |
|
|
DQ
1204
PUT
Daqo New Energy
DQ
$790M
| $5M | 0.01% |
124,000
+23,900
| +24% | +$1.39M |
|
1205
CALL
General Mills
GIS
$19.2B
| $4.99M | 0.01% |
74,100
-49,100
| -40% | -$3.12M |
|
1206
Gilead Sciences
GILD
$161B
| $4.99M | 0.01% |
68,715
-41,827
| -38% | -$2.88M |
|
1207
PUT
Polaris
PII
$4.15B
| $4.99M | 0.01% |
45,400
-26,500
| -37% | -$3.12M |
|
1208
CALL
Quanta Services
PWR
$93.9B
| $4.96M | 0.01% |
43,300
-5,000
| -10% | -$577K |
|
|
AAWW
1209
PUT
DELISTED
Atlas Air Worldwide Holdings, Inc.
AAWW
| $4.96M | 0.01% |
52,700
-11,900
| -18% | -$1.03M |
|
1210
CALL
Honda
HMC
$36.5B
| $4.95M | 0.01% |
174,100
-23,700
| -12% | -$689K |
|
|
IAA
1211
PUT
DELISTED
IAA, Inc. Common Stock
IAA
| $4.95M | 0.01% |
97,800
+10,800
| +12% | +$574K |
|
1212
PUT
State Street
STT
$50.9B
| $4.94M | 0.01% |
53,100
+2,600
| +5% | +$245K |
|
1213
CALL
WIX.com
WIX
$2.15B
| $4.94M | 0.01% |
31,300
+21,400
| +216% | +$3.71M |
|
|
GAP
1214
CALL
The Gap Inc
GAP
$6.84B
| $4.94M | 0.01% |
279,800
-59,100
| -17% | -$1.24M |
|
1215
Fidelity National Information Services
FIS
$21.5B
| $4.94M | 0.01% |
+45,235
| New | +$5.11M |
|
1216
PUT
Wheaton Precious Metals
WPM
$50.6B
| $4.94M | 0.01% |
115,000
+17,300
| +18% | +$712K |
|
1217
Xtrackers Harvest CSI 300 China A-Shares ETF
ASHR
$1.35B
| $4.92M | 0.01% |
125,940
+53,199
| +73% | +$2.07M |
|
1218
CALL
Clover Health Investments
CLOV
$2.28B
| $4.92M | 0.01% |
1,322,200
-1,284,100
| -49% | -$7.88M |
|
1219
PUT
Royal Bank of Canada
RY
$291B
| $4.91M | 0.01% |
46,300
-4,300
| -8% | -$446K |
|
1220
PUT
Equinix
EQIX
$107B
| $4.91M | 0.01% |
5,800
-1,800
| -24% | -$1.44M |
|
1221
PUT
PennyMac Financial
PFSI
$4.38B
| $4.9M | ﹤0.01% |
70,200
+24,700
| +54% | +$1.63M |
|
1222
CALL
Burlington
BURL
$22B
| $4.9M | ﹤0.01% |
16,800
+6,200
| +58% | +$1.74M |
|
1223
CALL
Old Dominion Freight Line
ODFL
$48.5B
| $4.87M | ﹤0.01% |
27,200
+21,600
| +386% | +$3.64M |
|
1224
C3.ai
AI
$1.27B
| $4.86M | ﹤0.01% |
155,490
+89,647
| +136% | +$3.63M |
|
|
EXAS
1225
PUT
DELISTED
Exact Sciences
EXAS
| $4.86M | ﹤0.01% |
62,400
+12,700
| +26% | +$1.12M |
|
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.