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 | |
|---|---|---|---|---|---|---|
|
SAIL
2726
DELISTED
SailPoint Technologies Holdings, Inc. Common Stock
SAIL
| $1.11M | ﹤0.01% |
22,916
+21,273
| +1,295% | +$1.04M |
|
2727
EQT Corp
EQT
$33.2B
| $1.11M | ﹤0.01% |
50,720
+48,275
| +1,974% | +$1.01M |
|
2728
PUT
Fulgent Genetics
FLGT
$559M
| $1.11M | ﹤0.01% |
11,000
-26,100
| -70% | -$2.29M |
|
2729
Boston Scientific
BSX
$65.8B
| $1.1M | ﹤0.01% |
26,023
-48,983
| -65% | -$2.06M |
|
2730
IMAX
IMAX
$2.38B
| $1.1M | ﹤0.01% |
61,892
+48,805
| +373% | +$936K |
|
2731
PUT
Duolingo
DUOL
$5.7B
| $1.1M | ﹤0.01% |
+10,400
| New | +$1.43M |
|
2732
PUT
Kimbell Royalty Partners
KRP
$1.47B
| $1.1M | ﹤0.01% |
80,900
-115,400
| -59% | -$1.65M |
|
2733
Weatherford International
WFRD
$6.36B
| $1.1M | ﹤0.01% |
39,705
+37,188
| +1,477% | +$1.02M |
|
2734
CALL
Scorpio Tankers
STNG
$3.96B
| $1.1M | ﹤0.01% |
85,700
-46,000
| -35% | -$710K |
|
|
CMA
2735
CALL
DELISTED
Comerica
CMA
| $1.1M | ﹤0.01% |
12,600
+3,100
| +33% | +$266K |
|
|
BDSI
2736
DELISTED
BioDelivery Sciences International, Inc.
BDSI
| $1.09M | ﹤0.01% |
+352,537
| New | +$1.19M |
|
2737
CALL
Stride
LRN
$3.69B
| $1.09M | ﹤0.01% |
32,700
-13,700
| -30% | -$473K |
|
|
AJRD
2738
CALL
DELISTED
Aerojet Rocketdyne Holdings
AJRD
| $1.09M | ﹤0.01% |
23,300
+17,300
| +288% | +$761K |
|
2739
PUT
Invitation Homes
INVH
$17.7B
| $1.09M | ﹤0.01% |
24,000
+18,500
| +336% | +$764K |
|
2740
ProShares UltraPro Short Russell2000
SRTY
$79.9M
| $1.09M | ﹤0.01% |
6,468
-2,883
| -31% | -$490K |
|
|
ELMS
2741
PUT
DELISTED
Electric Last Mile Solutions, Inc. Class A Common stock
ELMS
| $1.08M | ﹤0.01% |
154,400
+96,500
| +167% | +$731K |
|
2742
CALL
Barclays
BCS
$94.1B
| $1.08M | ﹤0.01% |
104,800
+32,600
| +45% | +$342K |
|
|
HLGN
2743
CALL
DELISTED
Heliogen, Inc.
HLGN
| $1.08M | ﹤0.01% |
+1,997
| New | +$700K |
|
2744
Ciena
CIEN
$55.3B
| $1.08M | ﹤0.01% |
14,074
+13,526
| +2,468% | +$835K |
|
2745
PUT
Royal Gold
RGLD
$17.1B
| $1.08M | ﹤0.01% |
10,300
-32,400
| -76% | -$3.27M |
|
|
OZON
2746
PUT
DELISTED
Ozon Holdings PLC American Depositary Shares, each ADS representing one ordinary share
OZON
| $1.08M | ﹤0.01% |
36,600
-26,300
| -42% | -$1.09M |
|
2747
Cytokinetics
CYTK
$11B
| $1.08M | ﹤0.01% |
23,760
-25,472
| -52% | -$983K |
|
2748
CALL
Boyd Gaming
BYD
$6.47B
| $1.08M | ﹤0.01% |
16,500
-35,100
| -68% | -$2.23M |
|
2749
CALL
TransDigm Group
TDG
$69.2B
| $1.08M | ﹤0.01% |
1,700
+1,100
| +183% | +$689K |
|
2750
Camping World
CWH
$363M
| $1.08M | ﹤0.01% |
26,756
-20,715
| -44% | -$837K |
|
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.