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 | |
|---|---|---|---|---|---|---|
|
SUMO
3051
CALL
DELISTED
Sumo Logic, Inc. Common Stock
SUMO
| $873K | ﹤0.01% |
64,400
-9,800
| -13% | -$152K |
|
3052
CALL
Aurora
AUR
$12.2B
| $872K | ﹤0.01% |
+77,500
| New | +$859K |
|
3053
CALL
Levi Strauss
LEVI
$9.83B
| $871K | ﹤0.01% |
34,800
-41,000
| -54% | -$1.06M |
|
3054
CALL
Qfin Holdings
QFIN
$1.65B
| $871K | ﹤0.01% |
38,000
+2,800
| +8% | +$62.3K |
|
3055
PUT
Gevo
GEVO
$380M
| $870K | ﹤0.01% |
203,500
+105,400
| +107% | +$646K |
|
|
REGI
3056
CALL
DELISTED
Renewable Energy Group, Inc.
REGI
| $870K | ﹤0.01% |
20,500
-400
| -2% | -$20.4K |
|
|
ABK
3057
PUT
DELISTED
Ambac Financial Group
ABK
| $869K | ﹤0.01% |
54,200
+38,700
| +250% | +$620K |
|
3058
PUT
Huntington Bancshares
HBAN
$34.7B
| $868K | ﹤0.01% |
56,300
-16,500
| -23% | -$260K |
|
3059
PUT
Hormel Foods
HRL
$14.3B
| $868K | ﹤0.01% |
17,800
-14,900
| -46% | -$653K |
|
3060
PUT
Adtran
ADTN
$769M
| $867K | ﹤0.01% |
38,000
+37,700
| +12,567% | +$763K |
|
3061
PUT
Bread Financial
BFH
$4.29B
| $867K | ﹤0.01% |
58,500
+13,893
| +31% | +$1.03M |
|
3062
Carlyle Group
CG
$16.7B
| $867K | ﹤0.01% |
+15,809
| New | +$861K |
|
3063
PUT
ZipRecruiter
ZIP
$346M
| $867K | ﹤0.01% |
34,800
+30,300
| +673% | +$831K |
|
|
ARCH
3064
PUT
DELISTED
Arch Resources, Inc.
ARCH
| $867K | ﹤0.01% |
9,500
+1,700
| +22% | +$151K |
|
3065
Saia
SAIA
$11.2B
| $866K | ﹤0.01% |
+2,571
| New | +$798K |
|
3066
PUT
Grab
GRAB
$13.7B
| $864K | ﹤0.01% |
+121,200
| New | +$925K |
|
3067
PUT
TAL Education Group
TAL
$5.86B
| $864K | ﹤0.01% |
220,000
-670,800
| -75% | -$3.03M |
|
3068
PUT
Plains All American Pipeline
PAA
$17.1B
| $863K | ﹤0.01% |
92,500
-36,300
| -28% | -$365K |
|
3069
Axcelis
ACLS
$3.94B
| $862K | ﹤0.01% |
11,569
+11,504
| +17,698% | +$682K |
|
|
HONE
3070
PUT
DELISTED
HarborOne Bancorp
HONE
| $862K | ﹤0.01% |
+58,100
| New | +$844K |
|
|
FTCV
3071
CALL
DELISTED
FinTech Acquisition Corp. V Class A Common Stock
FTCV
| $862K | ﹤0.01% |
86,900
-10,200
| -11% | -$105K |
|
3072
PUT
Ashland
ASH
$3.04B
| $861K | ﹤0.01% |
8,000
| – | – |
|
3073
CALL
Aldeyra Therapeutics
ALDX
$95.3M
| $860K | ﹤0.01% |
215,200
+168,900
| +365% | +$1.29M |
|
3074
PUT
The GEO Group
GEO
$4.13B
| $860K | ﹤0.01% |
111,000
-163,800
| -60% | -$1.34M |
|
3075
PUT
Principal Financial Group
PFG
$24B
| $860K | ﹤0.01% |
11,900
+6,800
| +133% | +$475K |
|
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.