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 | |
|---|---|---|---|---|---|---|
4726
PUT
Kodiak Sciences
KOD
$2.6B
| $271K | ﹤0.01% |
3,200
-19,800
| -86% | -$2.01M |
|
4727
PUT
Outdoor Holding Co
POWW
$249M
| $271K | ﹤0.01% |
49,900
-25,700
| -34% | -$157K |
|
4728
CALL
Walker & Dunlop
WD
$1.71B
| $271K | ﹤0.01% |
1,800
-700
| -28% | -$97.5K |
|
|
TRHC
4729
CALL
DELISTED
Tabula Rasa HealthCare, Inc. Common Stock
TRHC
| $271K | ﹤0.01% |
18,100
+14,500
| +403% | +$264K |
|
4730
Alpha and Omega Semiconductor
AOSL
$950M
| $270K | ﹤0.01% |
4,471
-327
| -7% | -$14.2K |
|
4731
PUT
Full House Resorts
FLL
$80.1M
| $270K | ﹤0.01% |
22,300
-3,700
| -14% | -$40.1K |
|
4732
PUT
Hess Midstream
HESM
$5.24B
| $270K | ﹤0.01% |
9,800
+9,100
| +1,300% | +$236K |
|
4733
PUT
Ionis Pharmaceuticals
IONS
$8.6B
| $270K | ﹤0.01% |
8,900
-15,400
| -63% | -$485K |
|
|
VRS
4734
CALL
DELISTED
Verso Corporation
VRS
| $270K | ﹤0.01% |
10,000
-13,600
| -58% | -$307K |
|
|
HITI
4735
CALL
High Tide
HITI
$186M
| $269K | ﹤0.01% |
63,400
+61,000
| +2,542% | +$352K |
|
4736
Lloyds Banking Group
LYG
$89.5B
| $269K | ﹤0.01% |
105,829
+73,734
| +230% | +$188K |
|
4737
Roundhill Ball Metaverse ETF
METV
$209M
| $269K | ﹤0.01% |
+17,765
| New | +$273K |
|
4738
State Street SPDR S&P Dividend ETF
SDY
$21.7B
| $269K | ﹤0.01% |
+2,090
| New | +$260K |
|
|
SLI
4739
PUT
Standard Lithium
SLI
$502M
| $268K | ﹤0.01% |
+27,400
| New | +$268K |
|
|
TPC
4740
PUT
Tutor Perini Cor
TPC
$4.41B
| $268K | ﹤0.01% |
21,700
+10,200
| +89% | +$136K |
|
4741
Leidos
LDOS
$14.5B
| $267K | ﹤0.01% |
3,007
+2,440
| +430% | +$228K |
|
4742
CALL
M/I Homes
MHO
$3.74B
| $267K | ﹤0.01% |
4,300
+3,500
| +438% | +$209K |
|
4743
CALL
SELLAS Life Sciences
SLS
$1.97B
| $267K | ﹤0.01% |
48,400
-47,700
| -50% | -$361K |
|
|
SEI
4744
PUT
Solaris Energy Infrastructure
SEI
$3.15B
| $267K | ﹤0.01% |
40,900
+12,900
| +46% | +$95.6K |
|
4745
CALL
Cohu
COHU
$2.26B
| $266K | ﹤0.01% |
7,000
+6,400
| +1,067% | +$219K |
|
|
XRN
4746
CALL
Chiron Real Estate Inc
XRN
$514M
| $266K | ﹤0.01% |
3,000
+1,180
| +65% | +$97.2K |
|
|
LX
4747
LexinFintech Holdings
LX
$241M
| $266K | ﹤0.01% |
69,136
-2,535
| -4% | -$12.6K |
|
4748
Invesco S&P 500 Equal Weight Consumer Discretionary ETF
RSPD
$317M
| $266K | ﹤0.01% |
+5,097
| New | +$261K |
|
4749
PUT
TriNet
TNET
$3.02B
| $266K | ﹤0.01% |
2,800
+400
| +17% | +$39.9K |
|
4750
Veracyte
VCYT
$3.7B
| $266K | ﹤0.01% |
6,464
+5,525
| +588% | +$244K |
|
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.