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 | |
|---|---|---|---|---|---|---|
|
SBEA
7676
CALL
DELISTED
SilverBox Engaged Merger Corp I Class A Common Stock
SBEA
| $36K | ﹤0.01% |
+30,100
| New | +$303K |
|
|
ADAP
7677
DELISTED
Adaptimmune Therapeutics
ADAP
| $35K | ﹤0.01% |
9,483
-3,882
| -29% | -$17.7K |
|
|
RYM
7678
PUT
RYTHM Inc
RYM
$39.5M
| $35K | ﹤0.01% |
+1
| New | +$48.6K |
|
7679
PUT
BigBear.ai
BBAI
$1.34B
| $35K | ﹤0.01% |
+6,300
| New | +$45.9K |
|
7680
PUT
Cibus
CBUS
$147M
| $35K | ﹤0.01% |
+336
| New | +$48.8K |
|
7681
Coherus Oncology
CHRS
$217M
| $35K | ﹤0.01% |
2,223
+935
| +73% | +$16.4K |
|
7682
CALL
CNO Financial Group
CNO
$5.14B
| $35K | ﹤0.01% |
1,500
+500
| +50% | +$12.3K |
|
7683
PUT
Cooper-Standard Automotive
CPS
$523M
| $35K | ﹤0.01% |
+1,600
| New | +$37.7K |
|
7684
PUT
DarioHealth
DRIO
$70.9M
| $35K | ﹤0.01% |
135
-265
| -66% | -$80.6K |
|
7685
CALL
8x8 Inc
EGHT
$269M
| $35K | ﹤0.01% |
2,100
-1,600
| -43% | -$33.5K |
|
7686
PUT
Essex Property Trust
ESS
$18.3B
| $35K | ﹤0.01% |
100
-400
| -80% | -$136K |
|
|
FARO
7687
CALL
DELISTED
Faro Technologies
FARO
| $35K | ﹤0.01% |
500
-9,100
| -95% | -$654K |
|
7688
CALL
Hancock Whitney
HWC
$6.2B
| $35K | ﹤0.01% |
700
-48,900
| -99% | -$2.44M |
|
7689
Hyster-Yale Materials Handling
HY
$599M
| $35K | ﹤0.01% |
+860
| New | +$37.6K |
|
7690
iShares Russell 1000 ETF
IWB
$48.2B
| $35K | ﹤0.01% |
133
-51
| -28% | -$13.1K |
|
7691
Kingstone Companies
KINS
$289M
| $35K | ﹤0.01% |
+7,101
| New | +$38.5K |
|
7692
Kiniksa Pharmaceuticals
KNSA
$5.8B
| $35K | ﹤0.01% |
3,052
-19,141
| -86% | -$235K |
|
7693
PUT
Myriad Genetics
MYGN
$270M
| $35K | ﹤0.01% |
1,300
-9,400
| -88% | -$272K |
|
|
NIU
7694
PUT
Niu Technologies
NIU
$203M
| $35K | ﹤0.01% |
2,200
-16,500
| -88% | -$364K |
|
7695
CALL
Otter Tail
OTTR
$3.71B
| $35K | ﹤0.01% |
500
-2,200
| -81% | -$142K |
|
|
PLG
7696
PUT
Platinum Group Metals
PLG
$164M
| $35K | ﹤0.01% |
22,200
+18,200
| +455% | +$41.4K |
|
|
SHOE
7697
Shoe Station Group
SHOE
$413M
| $35K | ﹤0.01% |
919
-225
| -20% | -$8.46K |
|
7698
PUT
SPX Corp
SPXC
$11B
| $35K | ﹤0.01% |
600
+300
| +100% | +$18.2K |
|
7699
Alaunos Therapeutics
TCRT
$4.59M
| $35K | ﹤0.01% |
217
-378
| -64% | -$83.1K |
|
7700
PUT
TransUnion
TRU
$15.1B
| $35K | ﹤0.01% |
300
-2,200
| -88% | -$252K |
|
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.