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 | |
|---|---|---|---|---|---|---|
|
SEAC
4751
PUT
DELISTED
Seachange International Inc
SEAC
| $266K | ﹤0.01% |
8,320
+6,595
| +382% | +$142K |
|
|
MUDS
4752
DELISTED
Mudrick Capital Acquisition Corporation II Class A Common Stock
MUDS
| $266K | ﹤0.01% |
26,789
-53,713
| -67% | -$535K |
|
|
EVFM
4753
CALL
DELISTED
Evofem Biosciences, Inc. Common Stock
EVFM
| $266K | ﹤0.01% |
47,240
+20,460
| +76% | +$174K |
|
4754
CALL
Biomerica
BMRA
$4.6M
| $265K | ﹤0.01% |
8,525
+8,250
| +3,000% | +$318K |
|
4755
PUT
Hudbay
HBM
$10.1B
| $265K | ﹤0.01% |
36,600
-20,800
| -36% | -$144K |
|
4756
CALL
Travel + Leisure Co
TNL
$4.66B
| $265K | ﹤0.01% |
4,800
+3,100
| +182% | +$166K |
|
4757
PUT
Sempra
SRE
$57.9B
| $264K | ﹤0.01% |
4,000
-23,400
| -85% | -$1.48M |
|
4758
CALL
Viking Therapeutics
VKTX
$3.7B
| $264K | ﹤0.01% |
57,500
-86,200
| -60% | -$483K |
|
4759
Celanese
CE
$4.9B
| $263K | ﹤0.01% |
1,570
-13,321
| -89% | -$2.17M |
|
4760
CALL
Freedom Holding
FRHC
$9.63B
| $263K | ﹤0.01% |
3,800
-200
| -5% | -$13.5K |
|
4761
iShares US Aerospace & Defense ETF
ITA
$14.2B
| $263K | ﹤0.01% |
2,561
-3,925
| -61% | -$409K |
|
4762
iShares US Healthcare ETF
IYH
$3.37B
| $263K | ﹤0.01% |
+4,380
| New | +$250K |
|
4763
PUT
KB Financial Group
KB
$41.4B
| $263K | ﹤0.01% |
5,700
+5,500
| +2,750% | +$261K |
|
4764
CALL
Onto Innovation
ONTO
$12.9B
| $263K | ﹤0.01% |
2,600
+2,100
| +420% | +$181K |
|
4765
Paylocity
PCTY
$7.38B
| $263K | ﹤0.01% |
1,114
+821
| +280% | +$218K |
|
|
ALBO
4766
CALL
DELISTED
Albireo Pharma Inc
ALBO
| $263K | ﹤0.01% |
11,300
+10,800
| +2,160% | +$287K |
|
|
ATIP
4767
DELISTED
ATI Physical Therapy, Inc.
ATIP
| $263K | ﹤0.01% |
1,554
+930
| +149% | +$157K |
|
4768
PUT
Invesco DB Base Metals Fund
DBB
$312M
| $262K | ﹤0.01% |
13,700
-19,300
| -58% | -$415K |
|
4769
Entegris
ENTG
$18.1B
| $262K | ﹤0.01% |
+1,894
| New | +$265K |
|
4770
CALL
Enova International
ENVA
$6.33B
| $262K | ﹤0.01% |
6,400
+300
| +5% | +$11.4K |
|
4771
Frontline
FRO
$8.76B
| $262K | ﹤0.01% |
37,140
-64,689
| -64% | -$516K |
|
4772
Interactive Brokers
IBKR
$39.2B
| $262K | ﹤0.01% |
13,200
-92,336
| -87% | -$1.72M |
|
4773
CALL
Teledyne Technologies
TDY
$30.4B
| $262K | ﹤0.01% |
600
-32,300
| -98% | -$14M |
|
4774
CALL
WEC Energy
WEC
$35.7B
| $262K | ﹤0.01% |
2,700
-10,900
| -80% | -$996K |
|
4775
CALL
ABM Industries
ABM
$2.81B
| $261K | ﹤0.01% |
6,400
-22,500
| -78% | -$1.02M |
|
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.