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 | |
|---|---|---|---|---|---|---|
3576
Global X US Infrastructure Development ETF
PAVE
$14.1B
| $590K | ﹤0.01% |
20,521
-12,205
| -37% | -$339K |
|
3577
Radiant Logistics
RLGT
$411M
| $590K | ﹤0.01% |
+81,052
| New | +$583K |
|
|
DCP
3578
PUT
DELISTED
DCP Midstream, LP
DCP
| $590K | ﹤0.01% |
21,500
-10,100
| -32% | -$293K |
|
3579
PUT
Axcelis
ACLS
$3.69B
| $589K | ﹤0.01% |
7,900
+5,800
| +276% | +$344K |
|
3580
PUT
Pacira BioSciences
PCRX
$1.05B
| $589K | ﹤0.01% |
9,800
+9,200
| +1,533% | +$507K |
|
3581
Safe Bulkers
SB
$761M
| $589K | ﹤0.01% |
156,253
-9,908
| -6% | -$40.4K |
|
3582
Sony
SONY
$133B
| $589K | ﹤0.01% |
23,315
-44,830
| -66% | -$1.07M |
|
|
LICY
3583
CALL
DELISTED
Li-Cycle Holdings Corp.
LICY
| $589K | ﹤0.01% |
+7,400
| New | +$699K |
|
3584
PUT
ProPetro Holding
PUMP
$1.31B
| $588K | ﹤0.01% |
72,700
-2,100
| -3% | -$19.1K |
|
3585
PUT
Frontier Group Holdings
ULCC
$1.43B
| $588K | ﹤0.01% |
43,400
+40,100
| +1,215% | +$613K |
|
|
CHNG
3586
DELISTED
Change Healthcare Inc. Common Stock
CHNG
| $588K | ﹤0.01% |
27,546
-9,019
| -25% | -$189K |
|
|
ONIT
3587
PUT
Onity Group
ONIT
$341M
| $587K | ﹤0.01% |
14,700
+9,500
| +183% | +$321K |
|
3588
PUT
Ares Capital
ARCC
$13.7B
| $586K | ﹤0.01% |
27,700
-43,200
| -61% | -$897K |
|
3589
United States Brent Oil Fund
BNO
$724M
| $586K | ﹤0.01% |
28,040
-6,895
| -20% | -$146K |
|
|
REE
3590
CALL
DELISTED
REE Automotive
REE
| $586K | ﹤0.01% |
+3,520
| New | +$441K |
|
|
3591
CALL
United States Brent Oil Fund
BNO
$724M
| $585K | ﹤0.01% |
28,000
+20,400
| +268% | +$432K |
|
3592
CALL
Principal Financial Group
PFG
$24.6B
| $585K | ﹤0.01% |
8,100
+5,800
| +252% | +$405K |
|
|
VSTO
3593
PUT
DELISTED
Vista Outdoor Inc.
VSTO
| $585K | ﹤0.01% |
12,700
-24,300
| -66% | -$1.04M |
|
3594
CALL
Duolingo
DUOL
$6.56B
| $583K | ﹤0.01% |
+5,500
| New | +$757K |
|
3595
CALL
Hillman Solutions
HLMN
$1.6B
| $583K | ﹤0.01% |
+54,300
| New | +$584K |
|
|
HTGCR
3596
CALL
DELISTED
HERCULES TECHNOLOGY GROWTH CAP INC TRANS RGTS TO PUR COM STK
HTGCR
| $583K | ﹤0.01% |
35,200
+6,800
| +24% | +$113K |
|
3597
CALL
Ubiquiti
UI
$32.4B
| $582K | ﹤0.01% |
1,900
+300
| +19% | +$91.3K |
|
3598
CALL
W.P. Carey
WPC
$16.8B
| $582K | ﹤0.01% |
7,249
-59,831
| -89% | -$4.58M |
|
3599
CALL
Healthpeak Properties
DOC
$15.7B
| $581K | ﹤0.01% |
16,100
-11,000
| -41% | -$379K |
|
3600
CALL
Array Technologies
ARRY
$785M
| $580K | ﹤0.01% |
37,000
-27,300
| -42% | -$534K |
|
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.