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 | |
|---|---|---|---|---|---|---|
4801
Babcock & Wilcox
BW
$1.39B
| $257K | ﹤0.01% |
28,520
+23,042
| +421% | +$185K |
|
4802
PUT
Dine Brands
DIN
$456M
| $257K | ﹤0.01% |
3,400
-18,700
| -85% | -$1.52M |
|
4803
iShares S&P 500 Value ETF
IVE
$49B
| $257K | ﹤0.01% |
+1,643
| New | +$250K |
|
4804
Alliant Energy
LNT
$18.3B
| $257K | ﹤0.01% |
4,184
+413
| +11% | +$23.7K |
|
4805
PUT
Copa Holdings
CPA
$5.76B
| $256K | ﹤0.01% |
3,100
-9,600
| -76% | -$752K |
|
4806
GXO Logistics
GXO
$5.77B
| $256K | ﹤0.01% |
+2,822
| New | +$254K |
|
|
PPBT
4807
CALL
Purple Biotech
PPBT
$1.31M
| $256K | ﹤0.01% |
330
+216
| +189% | +$184K |
|
4808
USA Compression Partners
USAC
$3.79B
| $256K | ﹤0.01% |
+14,675
| New | +$234K |
|
|
EGLX
4809
CALL
DELISTED
Enthusiast Gaming Holdings Inc. Common Stock
EGLX
| $256K | ﹤0.01% |
87,300
+59,700
| +216% | +$204K |
|
|
REV
4810
CALL
DELISTED
Revlon, Inc.
REV
| $256K | ﹤0.01% |
22,600
-3,400
| -13% | -$39.5K |
|
4811
PUT
AGCO
AGCO
$7.15B
| $255K | ﹤0.01% |
2,200
-12,300
| -85% | -$1.49M |
|
4812
PUT
Americold
COLD
$4.02B
| $255K | ﹤0.01% |
7,800
+2,100
| +37% | +$64.9K |
|
4813
ProShares UltraShort FTSE Europe
EPV
$11.1M
| $255K | ﹤0.01% |
4,614
+866
| +23% | +$50.1K |
|
|
ILPT
4814
PUT
Industrial Logistics Properties Trust
ILPT
$575M
| $255K | ﹤0.01% |
10,200
+6,600
| +183% | +$167K |
|
4815
CALL
Rush Enterprises Class A
RUSHA
$6.2B
| $255K | ﹤0.01% |
6,900
+6,600
| +2,200% | +$231K |
|
4816
Wayfair
W
$11.2B
| $255K | ﹤0.01% |
1,345
-1,446
| -52% | -$341K |
|
|
GNOG
4817
CALL
DELISTED
Golden Nugget Online Gaming, Inc. Class A Common Stock
GNOG
| $255K | ﹤0.01% |
25,700
-16,000
| -38% | -$227K |
|
4818
CALL
BigBear.ai
BBAI
$1.34B
| $254K | ﹤0.01% |
+45,000
| New | +$328K |
|
|
SLAI
4819
PUT
DELISTED
SOLAI Ltd ADS
SLAI
| $254K | ﹤0.01% |
591
+407
| +221% | +$223K |
|
|
MSB
4820
Mesabi Trust
MSB
$289M
| $254K | ﹤0.01% |
9,619
+7,828
| +437% | +$209K |
|
4821
CALL
MYR Group
MYRG
$5.19B
| $254K | ﹤0.01% |
2,300
+1,500
| +188% | +$163K |
|
4822
Theravance Biopharma
TBPH
$874M
| $254K | ﹤0.01% |
23,065
+22,215
| +2,614% | +$194K |
|
|
PLXP
4823
CALL
DELISTED
PLx Pharma Inc. Common Stock
PLXP
| $254K | ﹤0.01% |
31,800
+27,700
| +676% | +$325K |
|
|
BCLI
4824
PUT
DELISTED
BRAINSTORM CELL THERAPUTC
BCLI
| $253K | ﹤0.01% |
4,227
-1,746
| -29% | -$85.9K |
|
4825
CALL
Fusion Fuel Green
HTOO
$18.7M
| $253K | ﹤0.01% |
874
+523
| +149% | +$206K |
|
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.