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 | |
|---|---|---|---|---|---|---|
3801
Casey's General Stores
CASY
$31.7B
| $502K | ﹤0.01% |
2,547
+1,868
| +275% | +$361K |
|
3802
ProShares UltraShort Euro
EUO
$35.5M
| $502K | ﹤0.01% |
19,442
+19,343
| +19,538% | +$495K |
|
3803
PUT
Iovance Biotherapeutics
IOVA
$2.1B
| $502K | ﹤0.01% |
26,300
+7,000
| +36% | +$154K |
|
3804
PUT
Tecnoglass
TGLS
$2.09B
| $502K | ﹤0.01% |
+19,200
| New | +$538K |
|
|
BIG
3805
DELISTED
Big Lots, Inc.
BIG
| $502K | ﹤0.01% |
+11,162
| New | +$508K |
|
|
CEQP
3806
PUT
DELISTED
Crestwood Equity Partners LP
CEQP
| $502K | ﹤0.01% |
18,200
+9,900
| +119% | +$276K |
|
3807
PUT
Avantor
AVTR
$8.48B
| $501K | ﹤0.01% |
11,900
-18,900
| -61% | -$745K |
|
3808
Celldex Therapeutics
CLDX
$2.79B
| $501K | ﹤0.01% |
12,990
-23,921
| -65% | -$1.04M |
|
3809
PUT
Frontline
FRO
$8.63B
| $500K | ﹤0.01% |
70,800
-39,000
| -36% | -$311K |
|
3810
PUT
W.P. Carey
WPC
$16.8B
| $500K | ﹤0.01% |
6,228
-11,640
| -65% | -$891K |
|
|
SRTA
3811
CALL
Strata Critical Medical Inc
SRTA
$440M
| $499K | ﹤0.01% |
56,600
-124,500
| -69% | -$1.18M |
|
3812
BlueLinx
BXC
$465M
| $498K | ﹤0.01% |
5,209
+950
| +22% | +$64.3K |
|
3813
PUT
Quince Therapeutics
QNCX
$18.9M
| $498K | ﹤0.01% |
198
+171
| +633% | +$1.04M |
|
3814
CenterPoint Energy
CNP
$28.8B
| $497K | ﹤0.01% |
17,838
-25,350
| -59% | -$677K |
|
3815
PUT
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.23B
| $497K | ﹤0.01% |
10,300
+5,100
| +98% | +$186K |
|
|
ERF
3816
CALL
DELISTED
Enerplus Corporation
ERF
| $497K | ﹤0.01% |
47,000
+14,200
| +43% | +$138K |
|
|
KLR
3817
CALL
DELISTED
Kaleyra, Inc.
KLR
| $497K | ﹤0.01% |
14,171
-8,229
| -37% | -$313K |
|
3818
CALL
Energy Recovery
ERII
$433M
| $496K | ﹤0.01% |
23,100
-45,800
| -66% | -$958K |
|
|
HES
3819
DELISTED
Hess
HES
| $496K | ﹤0.01% |
6,709
-10,884
| -62% | -$883K |
|
3820
Roundhill Video Games ETF
NERD
$14.8M
| $496K | ﹤0.01% |
19,999
-10,903
| -35% | -$287K |
|
|
ATSG
3821
CALL
DELISTED
Air Transport Services Group
ATSG
| $496K | ﹤0.01% |
16,900
+15,800
| +1,436% | +$420K |
|
|
GRTX
3822
DELISTED
Galera Therapeutics, Inc. Common Stock
GRTX
| $496K | ﹤0.01% |
+108,229
| New | +$358K |
|
3823
ProShares UltraPro Short Dow 30
SDOW
$160M
| $495K | ﹤0.01% |
4,766
+3,081
| +183% | +$352K |
|
|
ATHX
3824
CALL
DELISTED
Athersys, Inc. Common Stock
ATHX
| $495K | ﹤0.01% |
21,968
+21,272
| +3,056% | +$610K |
|
3825
CALL
Western Midstream Partners
WES
$19.4B
| $494K | ﹤0.01% |
22,200
+10,300
| +87% | +$220K |
|
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.