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 | |
|---|---|---|---|---|---|---|
|
NEUE
2851
CALL
DELISTED
NeueHealth
NEUE
| $1M | ﹤0.01% |
+3,648
| New | +$1.68M |
|
2852
Colgate-Palmolive
CL
$73.8B
| $1M | ﹤0.01% |
11,731
-10,276
| -47% | -$802K |
|
2853
Digital Realty Trust
DLR
$71.6B
| $1M | ﹤0.01% |
5,659
+4,574
| +422% | +$733K |
|
2854
PUT
Carriage Services
CSV
$628M
| $998K | ﹤0.01% |
15,500
+7,700
| +99% | +$399K |
|
2855
PUT
XPO
XPO
$24B
| $998K | ﹤0.01% |
44,263
-69,844
| -61% | -$3.25M |
|
2856
Plains All American Pipeline
PAA
$17.2B
| $997K | ﹤0.01% |
+106,771
| New | +$1.07M |
|
2857
Cadence Design Systems
CDNS
$93.2B
| $996K | ﹤0.01% |
5,347
-4,760
| -47% | -$830K |
|
2858
CALL
Ventas
VTR
$48.9B
| $996K | ﹤0.01% |
19,500
-36,100
| -65% | -$1.89M |
|
|
TGH
2859
PUT
DELISTED
Textainer Group Holdings limited
TGH
| $996K | ﹤0.01% |
27,900
+7,700
| +38% | +$279K |
|
2860
Amplify Blockchain Technology ETF
BLOK
$1.09B
| $992K | ﹤0.01% |
24,709
+9,362
| +61% | +$487K |
|
2861
PUT
Qfin Holdings
QFIN
$1.63B
| $992K | ﹤0.01% |
43,300
-4,100
| -9% | -$91.2K |
|
2862
PUT
Levi Strauss
LEVI
$9.72B
| $991K | ﹤0.01% |
39,600
-7,500
| -16% | -$194K |
|
2863
Lumentum
LITE
$54.6B
| $990K | ﹤0.01% |
9,365
-7,414
| -44% | -$675K |
|
2864
Vicor
VICR
$8.98B
| $990K | ﹤0.01% |
7,802
+6,471
| +486% | +$916K |
|
|
BZUN
2865
CALL
Baozun
BZUN
$162M
| $989K | ﹤0.01% |
71,200
+40,400
| +131% | +$662K |
|
|
ATIP
2866
CALL
DELISTED
ATI Physical Therapy, Inc.
ATIP
| $988K | ﹤0.01% |
5,834
+1,996
| +52% | +$336K |
|
2867
Direxion Daily S&P 500 Bear 3x ETF
SPXS
$351M
| $985K | ﹤0.01% |
6,016
+3,210
| +114% | +$602K |
|
2868
CALL
H&R Block
HRB
$5.38B
| $984K | ﹤0.01% |
41,800
-37,700
| -47% | -$914K |
|
2869
CALL
Outfront Media
OUT
$5.7B
| $984K | ﹤0.01% |
37,286
+35,457
| +1,939% | +$912K |
|
2870
PUT
Vornado Realty Trust
VNO
$7.51B
| $983K | ﹤0.01% |
23,500
-27,200
| -54% | -$1.18M |
|
|
MMP
2871
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $983K | ﹤0.01% |
+21,179
| New | +$1M |
|
2872
Elanco Animal Health
ELAN
$12.6B
| $982K | ﹤0.01% |
34,615
+10,797
| +45% | +$336K |
|
2873
CALL
Banco Macro
BMA
$5.83B
| $981K | ﹤0.01% |
70,000
-100,200
| -59% | -$1.57M |
|
|
COWN
2874
CALL
DELISTED
Cowen Inc. Class A Common Stock
COWN
| $981K | ﹤0.01% |
27,200
+14,300
| +111% | +$525K |
|
|
RETA
2875
DELISTED
Reata Pharmaceuticals, Inc. Class A Common Stock
RETA
| $979K | ﹤0.01% |
+37,150
| New | +$2.87M |
|
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.