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 | |
|---|---|---|---|---|---|---|
4526
La-Z-Boy
LZB
$1.58B
| $307K | ﹤0.01% |
+8,456
| New | +$295K |
|
4527
PUT
Melco Resorts & Entertainment
MLCO
$2.22B
| $307K | ﹤0.01% |
30,200
-154,300
| -84% | -$1.64M |
|
|
RNLX
4528
DELISTED
Renalytix plc American Depositary Shares
RNLX
| $307K | ﹤0.01% |
+19,348
| New | +$387K |
|
4529
PUT
Boise Cascade
BCC
$2.69B
| $306K | ﹤0.01% |
4,300
+600
| +16% | +$38.7K |
|
|
CVAC
4530
DELISTED
CureVac
CVAC
| $306K | ﹤0.01% |
8,932
+8,266
| +1,241% | +$333K |
|
4531
Everest Group
EG
$14.5B
| $306K | ﹤0.01% |
1,118
+797
| +248% | +$215K |
|
4532
CALL
GFL Environmental
GFL
$14.9B
| $306K | ﹤0.01% |
8,100
+8,000
| +8,000% | +$311K |
|
|
HIVE
4533
HIVE Digital Technologies
HIVE
$774M
| $306K | ﹤0.01% |
+23,250
| New | +$400K |
|
4534
PUT
Koppers
KOP
$943M
| $306K | ﹤0.01% |
9,800
+5,500
| +128% | +$180K |
|
4535
Merit Medical Systems
MMSI
$5.07B
| $306K | ﹤0.01% |
+4,914
| New | +$329K |
|
4536
Teradyne
TER
$57.6B
| $306K | ﹤0.01% |
1,875
-12,708
| -87% | -$1.79M |
|
|
ADVM
4537
PUT
DELISTED
Adverum Biotechnologies
ADVM
| $305K | ﹤0.01% |
17,360
+1,430
| +9% | +$28.6K |
|
|
SEGG
4538
PUT
Sports Entertainment Gaming Global Corp
SEGG
$11.2M
| $305K | ﹤0.01% |
+240
| New | +$470K |
|
4539
CALL
CVR Partners
UAN
$1.36B
| $305K | ﹤0.01% |
3,700
+1,700
| +85% | +$135K |
|
|
RADA
4540
DELISTED
Rada Electronic Industries Ltd
RADA
| $305K | ﹤0.01% |
32,422
-81,860
| -72% | -$820K |
|
4541
CALL
Fortress Biotech
FBIO
$104M
| $304K | ﹤0.01% |
8,127
+2,587
| +47% | +$115K |
|
4542
CALL
Freshpet
FRPT
$2.93B
| $304K | ﹤0.01% |
3,200
+2,900
| +967% | +$360K |
|
4543
CALL
Option Care Health
OPCH
$3.45B
| $304K | ﹤0.01% |
10,700
+4,500
| +73% | +$118K |
|
4544
PUT
Playtika
PLTK
$1.52B
| $304K | ﹤0.01% |
17,600
-76,300
| -81% | -$1.71M |
|
4545
Root
ROOT
$857M
| $304K | ﹤0.01% |
5,452
-695
| -11% | -$54.3K |
|
4546
PUT
Timken Company
TKR
$9.56B
| $304K | ﹤0.01% |
4,400
-1,100
| -20% | -$77.1K |
|
4547
CALL
TriNet
TNET
$3.02B
| $304K | ﹤0.01% |
3,200
-200
| -6% | -$20K |
|
4548
PUT
AbCellera Biologics
ABCL
$1.74B
| $303K | ﹤0.01% |
21,200
-7,000
| -25% | -$106K |
|
4549
CALL
Aemetis
AMTX
$106M
| $303K | ﹤0.01% |
24,700
-59,400
| -71% | -$1.05M |
|
4550
CALL
Accuray
ARAY
$32M
| $303K | ﹤0.01% |
63,700
+48,300
| +314% | +$233K |
|
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.