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 | |
|---|---|---|---|---|---|---|
3451
Bakkt Inc
BKKT
$331M
| $656K | ﹤0.01% |
+3,088
| New | +$1.28M |
|
3452
CALL
Choice Hotels
CHH
$5.23B
| $655K | ﹤0.01% |
4,200
+2,200
| +110% | +$316K |
|
3453
GlobalFoundries
GFS
$26.9B
| $655K | ﹤0.01% |
+10,095
| New | +$627K |
|
|
WEBR
3454
CALL
DELISTED
Weber Inc.
WEBR
| $655K | ﹤0.01% |
+50,700
| New | +$752K |
|
|
CODX
3455
CALL
Co-Diagnostics
CODX
$7.04M
| $654K | ﹤0.01% |
2,443
+1,250
| +105% | +$328K |
|
3456
PUT
Endava
DAVA
$159M
| $654K | ﹤0.01% |
+3,900
| New | +$604K |
|
3457
CryoPort
CYRX
$771M
| $653K | ﹤0.01% |
11,038
-4,864
| -31% | -$337K |
|
3458
iShares Latin America 40 ETF
ILF
$3.8B
| $653K | ﹤0.01% |
27,848
+13,731
| +97% | +$343K |
|
|
SFIX
3459
Stitch Fix
SFIX
$560M
| $652K | ﹤0.01% |
34,500
+27,852
| +419% | +$798K |
|
3460
CALL
Zedge
ZDGE
$39.6M
| $652K | ﹤0.01% |
76,800
+42,400
| +123% | +$465K |
|
3461
CALL
Essential Properties Realty Trust
EPRT
$6.94B
| $651K | ﹤0.01% |
22,600
+21,400
| +1,783% | +$612K |
|
3462
PUT
Freedom Holding
FRHC
$9.84B
| $651K | ﹤0.01% |
9,400
+6,600
| +236% | +$444K |
|
|
AZUL
3463
CALL
DELISTED
Azul
AZUL
| $650K | ﹤0.01% |
49,300
+16,400
| +50% | +$249K |
|
3464
CALL
Outset Medical
OM
$88.4M
| $649K | ﹤0.01% |
+940
| New | +$695K |
|
|
CRHC
3465
PUT
DELISTED
Cohn Robbins Holdings Corp.
CRHC
| $649K | ﹤0.01% |
66,100
+64,500
| +4,031% | +$636K |
|
3466
Expeditors International
EXPD
$22.5B
| $648K | ﹤0.01% |
+4,826
| New | +$604K |
|
3467
HP
HPQ
$25.5B
| $648K | ﹤0.01% |
+17,221
| New | +$563K |
|
3468
CALL
Nektar Therapeutics
NKTR
$2.37B
| $648K | ﹤0.01% |
3,200
+2,420
| +310% | +$525K |
|
|
MNRL
3469
CALL
DELISTED
Brigham Minerals, Inc. Class A Common Stock
MNRL
| $647K | ﹤0.01% |
30,700
+29,700
| +2,970% | +$647K |
|
3470
CALL
Boston Properties
BXP
$11.1B
| $645K | ﹤0.01% |
5,600
-17,400
| -76% | -$2M |
|
3471
Kyndryl
KD
$2.95B
| $645K | ﹤0.01% |
+35,673
| New | +$770K |
|
3472
CALL
Gaotu Techedu
GOTU
$382M
| $644K | ﹤0.01% |
332,400
-434,900
| -57% | -$1.21M |
|
3473
PUT
Krispy Kreme
DNUT
$564M
| $643K | ﹤0.01% |
+34,000
| New | +$500K |
|
|
ARNA
3474
DELISTED
Arena Pharmaceuticals Inc
ARNA
| $643K | ﹤0.01% |
+6,927
| New | +$456K |
|
3475
PUT
Sensata Technologies
ST
$6.69B
| $641K | ﹤0.01% |
10,400
-15,900
| -60% | -$926K |
|
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.