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 | |
|---|---|---|---|---|---|---|
5926
CALL
Graphic Packaging
GPK
$3.52B
| $122K | ﹤0.01% |
6,300
-6,200
| -50% | -$124K |
|
5927
Fusion Fuel Green
HTOO
$18M
| $122K | ﹤0.01% |
+422
| New | +$166K |
|
5928
Lantronix
LTRX
$272M
| $122K | ﹤0.01% |
+15,642
| New | +$119K |
|
5929
PUT
Old Republic International
ORI
$10.5B
| $122K | ﹤0.01% |
5,000
-19,300
| -79% | -$479K |
|
5930
Ross Stores
ROST
$80.5B
| $122K | ﹤0.01% |
+1,072
| New | +$120K |
|
|
SIFY
5931
PUT
Sify Technologies
SIFY
$1.14B
| $122K | ﹤0.01% |
6,317
+1,534
| +32% | +$31.2K |
|
5932
CALL
BlackRock TCP Capital
TCPC
$295M
| $122K | ﹤0.01% |
9,100
+2,200
| +32% | +$30.5K |
|
|
UMH
5933
CALL
UMH Properties
UMH
$1.3B
| $122K | ﹤0.01% |
4,500
+1,300
| +41% | +$31.3K |
|
|
HEP
5934
DELISTED
Holly Energy Partners, L.P.
HEP
| $122K | ﹤0.01% |
+7,438
| New | +$132K |
|
|
ATHX
5935
PUT
DELISTED
Athersys, Inc. Common Stock
ATHX
| $122K | ﹤0.01% |
5,416
+1,184
| +28% | +$34K |
|
|
HMHC
5936
CALL
DELISTED
Houghton Mifflin Harcourt Company
HMHC
| $122K | ﹤0.01% |
7,600
-44,900
| -86% | -$683K |
|
|
COWN
5937
PUT
DELISTED
Cowen Inc. Class A Common Stock
COWN
| $122K | ﹤0.01% |
3,400
-1,900
| -36% | -$69.7K |
|
5938
Aramark
ARMK
$14.8B
| $121K | ﹤0.01% |
4,583
-7,534
| -62% | -$197K |
|
|
CSR
5939
CALL
Centerspace
CSR
$917M
| $121K | ﹤0.01% |
+1,100
| New | +$114K |
|
5940
CALL
GitLab
GTLB
$6.16B
| $121K | ﹤0.01% |
+1,400
| New | +$143K |
|
5941
PUT
Invivyd
IVVD
$169M
| $121K | ﹤0.01% |
+16,800
| New | +$437K |
|
5942
PUT
Lindsay Corp
LNN
$1.2B
| $121K | ﹤0.01% |
800
+700
| +700% | +$107K |
|
|
PLYA
5943
DELISTED
Playa Hotels & Resorts
PLYA
| $121K | ﹤0.01% |
15,286
-35,516
| -70% | -$285K |
|
5944
PUT
Pilgrim's Pride
PPC
$6.42B
| $121K | ﹤0.01% |
4,300
-6,100
| -59% | -$174K |
|
5945
CALL
Rafael Holdings
RFL
$97.2M
| $121K | ﹤0.01% |
24,235
+22,714
| +1,493% | +$305K |
|
5946
Schrodinger
SDGR
$1.17B
| $121K | ﹤0.01% |
3,483
-11,471
| -77% | -$524K |
|
|
SPTN
5947
PUT
DELISTED
SpartanNash
SPTN
| $121K | ﹤0.01% |
4,700
-51,900
| -92% | -$1.25M |
|
|
SY
5948
CALL
So-Young International
SY
$200M
| $121K | ﹤0.01% |
38,000
+23,600
| +164% | +$93.5K |
|
|
TEF
5949
CALL
DELISTED
Telefonica
TEF
| $121K | ﹤0.01% |
+29,523
| New | +$123K |
|
5950
West Fraser Timber
WFG
$5.48B
| $121K | ﹤0.01% |
+1,271
| New | +$110K |
|
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.