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 | |
|---|---|---|---|---|---|---|
1251
PUT
Harley-Davidson
HOG
$2.68B
| $4.72M | ﹤0.01% |
125,300
-110,500
| -47% | -$4.12M |
|
1252
PUT
Bloom Energy
BE
$52.6B
| $4.72M | ﹤0.01% |
215,300
-30,000
| -12% | -$759K |
|
1253
CALL
Copart
CPRT
$25.9B
| $4.71M | ﹤0.01% |
124,400
-17,200
| -12% | -$638K |
|
|
CTRA
1254
CALL
DELISTED
Coterra Energy
CTRA
| $4.71M | ﹤0.01% |
248,100
+117,600
| +90% | +$2.45M |
|
1255
CF Industries
CF
$19.2B
| $4.71M | ﹤0.01% |
+66,529
| New | +$4.17M |
|
|
1256
GE Aerospace
GE
$367B
| $4.69M | ﹤0.01% |
79,723
-560,114
| -88% | -$35.2M |
|
1257
CALL
Edwards Lifesciences
EW
$47.6B
| $4.69M | ﹤0.01% |
36,200
+1,100
| +3% | +$128K |
|
1258
PUT
Steel Dynamics
STLD
$35.6B
| $4.68M | ﹤0.01% |
75,400
-42,600
| -36% | -$2.67M |
|
|
RBAC
1259
CALL
DELISTED
RedBall Acquisition Corp.
RBAC
| $4.68M | ﹤0.01% |
471,700
+201,000
| +74% | +$2.01M |
|
|
RWT
1260
PUT
Redwood Trust
RWT
$616M
| $4.66M | ﹤0.01% |
353,000
+15,300
| +5% | +$207K |
|
1261
CALL
AngloGold Ashanti
AU
$40.3B
| $4.65M | ﹤0.01% |
221,600
+145,600
| +192% | +$2.84M |
|
1262
CALL
F5
FFIV
$22.1B
| $4.65M | ﹤0.01% |
19,000
+7,300
| +62% | +$1.62M |
|
1263
CALL
HSBC
HSBC
$355B
| $4.65M | ﹤0.01% |
154,100
-61,300
| -28% | -$1.79M |
|
1264
PUT
PPG Industries
PPG
$25.9B
| $4.64M | ﹤0.01% |
26,900
+9,200
| +52% | +$1.48M |
|
1265
PUT
Logitech
LOGI
$15.2B
| $4.63M | ﹤0.01% |
56,200
-84,100
| -60% | -$7.02M |
|
1266
CALL
Box
BOX
$4.02B
| $4.63M | ﹤0.01% |
176,900
-107,100
| -38% | -$2.76M |
|
1267
PUT
Jones Lang LaSalle
JLL
$15.1B
| $4.63M | ﹤0.01% |
17,200
+14,500
| +537% | +$3.74M |
|
1268
Bausch Health
BHC
$1.65B
| $4.63M | ﹤0.01% |
167,678
+15,116
| +10% | +$405K |
|
1269
PUT
Baker Hughes
BKR
$56.8B
| $4.62M | ﹤0.01% |
192,200
-33,100
| -15% | -$817K |
|
1270
CALL
Canadian Natural Resources
CNQ
$96.9B
| $4.62M | ﹤0.01% |
223,191
+157,847
| +242% | +$3.19M |
|
|
FRC
1271
PUT
DELISTED
First Republic Bank
FRC
| $4.61M | ﹤0.01% |
22,300
+21,100
| +1,758% | +$4.45M |
|
1272
Valero Energy
VLO
$89.8B
| $4.6M | ﹤0.01% |
61,271
+30,861
| +101% | +$2.3M |
|
1273
PUT
Sony
SONY
$123B
| $4.6M | ﹤0.01% |
182,000
+9,000
| +5% | +$214K |
|
1274
PUT
Dave & Buster's
PLAY
$343M
| $4.57M | ﹤0.01% |
119,000
-49,800
| -30% | -$1.85M |
|
1275
CALL
Invitation Homes
INVH
$17.7B
| $4.55M | ﹤0.01% |
100,300
+78,800
| +367% | +$3.26M |
|
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.