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 | |
|---|---|---|---|---|---|---|
3326
CALL
Xylem
XYL
$29.6B
| $719K | ﹤0.01% |
6,000
-2,500
| -29% | -$310K |
|
3327
CALL
Mueller Industries
MLI
$14.7B
| $718K | ﹤0.01% |
48,400
+44,800
| +1,244% | +$605K |
|
|
DNMR
3328
PUT
DELISTED
Danimer Scientific, Inc.
DNMR
| $718K | ﹤0.01% |
2,108
-405
| -16% | -$223K |
|
|
ABMD
3329
CALL
DELISTED
Abiomed Inc
ABMD
| $718K | ﹤0.01% |
2,000
-11,400
| -85% | -$3.85M |
|
|
AEVA
3330
CALL
Aeva Technologies
AEVA
$994M
| $717K | ﹤0.01% |
18,980
-2,140
| -10% | -$89.9K |
|
|
OLO
3331
CALL
DELISTED
Olo Inc
OLO
| $717K | ﹤0.01% |
34,500
+30,200
| +702% | +$786K |
|
3332
Trex
TREX
$4.61B
| $717K | ﹤0.01% |
5,312
+2,012
| +61% | +$242K |
|
3333
OneMain Financial
OMF
$7.14B
| $716K | ﹤0.01% |
+14,320
| New | +$758K |
|
3334
CALL
AEye
LIDR
$50M
| $714K | ﹤0.01% |
+4,923
| New | +$758K |
|
3335
PUT
Schrodinger
SDGR
$1.14B
| $714K | ﹤0.01% |
20,500
-51,400
| -71% | -$2.35M |
|
3336
PUT
iHeartMedia
IHRT
$529M
| $713K | ﹤0.01% |
33,900
+18,600
| +122% | +$394K |
|
3337
PUT
Lear
LEA
$7.48B
| $713K | ﹤0.01% |
3,900
-4,800
| -55% | -$843K |
|
|
TRTX
3338
CALL
TPG RE Finance Trust
TRTX
$660M
| $713K | ﹤0.01% |
57,900
-95,200
| -62% | -$1.21M |
|
3339
CALL
Booz Allen Hamilton
BAH
$8.71B
| $712K | ﹤0.01% |
8,400
-37,100
| -82% | -$3.13M |
|
|
POL
3340
CALL
DELISTED
Polished.com Inc.
POL
| $712K | ﹤0.01% |
5,940
+5,740
| +2,870% | +$773K |
|
3341
iShares Mortgage Real Estate ETF
REM
$549M
| $711K | ﹤0.01% |
20,603
+15,978
| +345% | +$584K |
|
3342
CALL
Skywest
SKYW
$4.51B
| $711K | ﹤0.01% |
18,100
+4,500
| +33% | +$201K |
|
3343
CALL
Calumet Specialty Products
CLMT
$3.62B
| $710K | ﹤0.01% |
53,800
+48,900
| +998% | +$615K |
|
|
MGI
3344
PUT
DELISTED
MoneyGram International, Inc. New
MGI
| $710K | ﹤0.01% |
90,100
-118,300
| -57% | -$813K |
|
3345
CALL
Nu Holdings
NU
$71.2B
| $709K | ﹤0.01% |
+75,600
| New | +$742K |
|
|
FPAC
3346
DELISTED
Far Peak Acquisition Corporation
FPAC
| $709K | ﹤0.01% |
+70,511
| New | +$727K |
|
3347
CALL
California Resources
CRC
$4.39B
| $708K | ﹤0.01% |
16,600
-400
| -2% | -$17.1K |
|
3348
PUT
Rambus
RMBS
$9.53B
| $708K | ﹤0.01% |
24,100
+11,300
| +88% | +$287K |
|
|
ADN
3349
CALL
DELISTED
Advent Technologies
ADN
| $707K | ﹤0.01% |
3,363
+1,560
| +87% | +$389K |
|
|
HUT
3350
Hut 8
HUT
$11.3B
| $707K | ﹤0.01% |
18,028
+2,641
| +17% | +$148K |
|
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.