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 | |
|---|---|---|---|---|---|---|
1351
PUT
M&T Bank
MTB
$36.2B
| $4.18M | ﹤0.01% |
27,200
+4,200
| +18% | +$645K |
|
|
AXON
1352
CALL
Axon Enterprise
AXON
$40.5B
| $4.18M | ﹤0.01% |
26,600
+1,000
| +4% | +$168K |
|
|
CTRA
1353
PUT
DELISTED
Coterra Energy
CTRA
| $4.17M | ﹤0.01% |
219,500
+156,200
| +247% | +$3.26M |
|
|
ZGNX
1354
PUT
DELISTED
Zogenix, Inc.
ZGNX
| $4.17M | ﹤0.01% |
341,100
+266,900
| +360% | +$3.91M |
|
1355
Asana
ASAN
$1.58B
| $4.16M | ﹤0.01% |
+55,783
| New | +$5.91M |
|
1356
CALL
British American Tobacco
BTI
$132B
| $4.15M | ﹤0.01% |
111,000
-99,000
| -47% | -$3.52M |
|
|
CCXI
1357
CALL
DELISTED
ChemoCentryx, Inc.
CCXI
| $4.15M | ﹤0.01% |
114,000
+43,200
| +61% | +$1.52M |
|
1358
CALL
Toll Brothers
TOL
$14B
| $4.15M | ﹤0.01% |
57,300
-73,600
| -56% | -$4.73M |
|
1359
PUT
Canadian Solar
CSIQ
$906M
| $4.14M | ﹤0.01% |
132,500
+70,800
| +115% | +$2.54M |
|
1360
PUT
DigitalOcean
DOCN
$14.4B
| $4.14M | ﹤0.01% |
51,600
+46,500
| +912% | +$4.35M |
|
1361
CALL
Cummins
CMI
$91.7B
| $4.14M | ﹤0.01% |
19,000
+4,300
| +29% | +$980K |
|
1362
PUT
Lightspeed Commerce
LSPD
$1.3B
| $4.14M | ﹤0.01% |
102,400
+92,400
| +924% | +$6.3M |
|
|
FIRY
1363
CALL
Firy Inc
FIRY
$127M
| $4.14M | ﹤0.01% |
27,825
+8,920
| +47% | +$1.71M |
|
1364
HDFC Bank
HDB
$119B
| $4.13M | ﹤0.01% |
127,042
+94,088
| +286% | +$3.29M |
|
1365
CALL
Planet Fitness
PLNT
$4.23B
| $4.13M | ﹤0.01% |
45,600
+29,800
| +189% | +$2.54M |
|
1366
PUT
Methanex
MEOH
$4.32B
| $4.13M | ﹤0.01% |
104,400
+54,000
| +107% | +$2.4M |
|
1367
PUT
Jazz Pharmaceuticals
JAZZ
$15.9B
| $4.13M | ﹤0.01% |
32,400
-9,600
| -23% | -$1.26M |
|
1368
CALL
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$263M
| $4.12M | ﹤0.01% |
50,100
+20,500
| +69% | +$1.27M |
|
|
LAC
1369
CALL
DELISTED
Lithium Americas Corp. Common Shares
LAC
| $4.12M | ﹤0.01% |
141,500
+24,500
| +21% | +$733K |
|
1370
CALL
Sysco
SYY
$39.7B
| $4.12M | ﹤0.01% |
52,400
+3,400
| +7% | +$262K |
|
1371
Spotify
SPOT
$99.2B
| $4.1M | ﹤0.01% |
17,531
+17,490
| +42,659% | +$4.38M |
|
1372
CALL
Lattice Semiconductor
LSCC
$17.6B
| $4.1M | ﹤0.01% |
53,200
+20,200
| +61% | +$1.5M |
|
1373
CALL
Carriage Services
CSV
$618M
| $4.1M | ﹤0.01% |
+63,600
| New | +$3.29M |
|
1374
Honeywell
HON
$77B
| $4.1M | ﹤0.01% |
20,845
+785
| +4% | +$158K |
|
1375
CALL
KB Home
KBH
$3.48B
| $4.09M | ﹤0.01% |
91,500
-35,300
| -28% | -$1.48M |
|
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.