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 | |
|---|---|---|---|---|---|---|
|
MTA
3751
PUT
Metalla Royalty & Streaming
MTA
$688M
| $517K | ﹤0.01% |
74,700
+61,400
| +462% | +$452K |
|
|
MTLS
3752
PUT
Materialise
MTLS
$373M
| $517K | ﹤0.01% |
21,700
+8,300
| +62% | +$193K |
|
3753
PUT
Plains GP Holdings
PAGP
$5.2B
| $517K | ﹤0.01% |
51,000
-77,500
| -60% | -$835K |
|
3754
PG&E
PCG
$39.2B
| $517K | ﹤0.01% |
+42,633
| New | +$500K |
|
3755
PUT
Targa Resources
TRGP
$56.2B
| $517K | ﹤0.01% |
9,900
-27,100
| -73% | -$1.45M |
|
|
WE
3756
DELISTED
WeWork Inc.
WE
| $517K | ﹤0.01% |
+1,505
| New | +$551K |
|
|
PRPB
3757
CALL
DELISTED
CC Neuberger Principal Holdings II Class A Ordinary Shares
PRPB
| $517K | ﹤0.01% |
52,300
-278,000
| -84% | -$2.74M |
|
3758
CALL
Urban Outfitters
URBN
$6.44B
| $516K | ﹤0.01% |
17,600
-30,400
| -63% | -$964K |
|
|
BERY
3759
DELISTED
Berry Global Group, Inc.
BERY
| $516K | ﹤0.01% |
7,618
-10,868
| -59% | -$673K |
|
3760
CALL
Blue Owl Capital
OBDC
$5.47B
| $515K | ﹤0.01% |
36,400
+9,800
| +37% | +$140K |
|
|
TGI
3761
PUT
DELISTED
Triumph Group
TGI
| $515K | ﹤0.01% |
27,800
+21,100
| +315% | +$412K |
|
3762
Vanguard Consumer Discretionary ETF
VCR
$6.01B
| $515K | ﹤0.01% |
1,512
-878
| -37% | -$295K |
|
3763
CALL
Kopin
KOPN
$654M
| $514K | ﹤0.01% |
125,900
-43,200
| -26% | -$219K |
|
|
SP
3764
DELISTED
SP Plus Corporation
SP
| $514K | ﹤0.01% |
18,223
-18,387
| -50% | -$551K |
|
|
ADAM
3765
Adamas Trust
ADAM
$783M
| $513K | ﹤0.01% |
34,530
+33,805
| +4,663% | +$554K |
|
3766
PUT
United States 12 Month Oil Fund,
USL
$43.5M
| $513K | ﹤0.01% |
18,400
+10,900
| +145% | +$304K |
|
|
VRAY
3767
DELISTED
ViewRay, Inc.
VRAY
| $513K | ﹤0.01% |
93,165
+44,876
| +93% | +$273K |
|
3768
CALL
SPS Commerce
SPSC
$2.51B
| $512K | ﹤0.01% |
3,600
+3,100
| +620% | +$464K |
|
|
GES
3769
CALL
DELISTED
Guess Inc
GES
| $511K | ﹤0.01% |
21,600
-22,000
| -50% | -$487K |
|
3770
PUT
QuinStreet
QNST
$916M
| $511K | ﹤0.01% |
28,100
+11,300
| +67% | +$187K |
|
3771
CALL
ReNew
RNW
$2.22B
| $511K | ﹤0.01% |
+65,700
| New | +$578K |
|
3772
iShare MSCI Eurozone ETF
EZU
$9.44B
| $510K | ﹤0.01% |
10,419
+7,151
| +219% | +$352K |
|
3773
CALL
Fox Factory Holding Corp
FOXF
$801M
| $510K | ﹤0.01% |
3,000
+1,300
| +76% | +$218K |
|
3774
Royalty Pharma
RPRX
$26.6B
| $510K | ﹤0.01% |
12,798
+11,774
| +1,150% | +$457K |
|
3775
Frontier Group Holdings
ULCC
$1.43B
| $510K | ﹤0.01% |
37,592
+23,265
| +162% | +$356K |
|
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.