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 | |
|---|---|---|---|---|---|---|
2401
CALL
Huntington Bancshares
HBAN
$35.1B
| $1.44M | ﹤0.01% |
93,700
+44,200
| +89% | +$697K |
|
2402
PUT
BioCryst Pharmaceuticals
BCRX
$2.37B
| $1.44M | ﹤0.01% |
104,200
-54,900
| -35% | -$727K |
|
2403
PUT
Olin
OLN
$2.64B
| $1.44M | ﹤0.01% |
25,100
-100
| -0.4% | -$5.61K |
|
2404
Wabtec
WAB
$51.1B
| $1.44M | ﹤0.01% |
15,620
-1,812
| -10% | -$166K |
|
|
TBCH
2405
PUT
Turtle Beach Corp
TBCH
$239M
| $1.44M | ﹤0.01% |
64,600
+53,000
| +457% | +$1.43M |
|
2406
Zillow
ZG
$7.02B
| $1.43M | ﹤0.01% |
23,050
+8,713
| +61% | +$626K |
|
2407
PUT
Foghorn Therapeutics
FHTX
$285M
| $1.43M | ﹤0.01% |
+62,700
| New | +$901K |
|
2408
CALL
Toast
TOST
$16.8B
| $1.43M | ﹤0.01% |
+41,300
| New | +$1.91M |
|
|
SBNY
2409
DELISTED
Signature Bank
SBNY
| $1.43M | ﹤0.01% |
4,432
-14,890
| -77% | -$4.64M |
|
2410
F5
FFIV
$22.1B
| $1.43M | ﹤0.01% |
5,852
+4,242
| +263% | +$942K |
|
2411
CALL
Opko Health
OPK
$921M
| $1.43M | ﹤0.01% |
297,900
+85,800
| +40% | +$347K |
|
2412
Tyson Foods
TSN
$20.2B
| $1.43M | ﹤0.01% |
16,428
-45,911
| -74% | -$3.78M |
|
|
TWNK
2413
CALL
DELISTED
Hostess Brands, Inc. Class A Common Stock
TWNK
| $1.43M | ﹤0.01% |
70,000
-15,100
| -18% | -$281K |
|
2414
CALL
Deckers Outdoor
DECK
$13.3B
| $1.43M | ﹤0.01% |
23,400
-52,800
| -69% | -$3.4M |
|
|
NCTY
2415
CALL
The9 Ltd
NCTY
$49M
| $1.43M | ﹤0.01% |
21,310
+8,050
| +61% | +$817K |
|
2416
PUT
Liberty Media Series A
FWONA
$22.3B
| $1.43M | ﹤0.01% |
31,752
-627
| -2% | -$32.4K |
|
2417
PUT
BorgWarner
BWA
$13.2B
| $1.42M | ﹤0.01% |
35,898
+11,523
| +47% | +$463K |
|
2418
PUT
Adient
ADNT
$1.6B
| $1.42M | ﹤0.01% |
29,700
+12,100
| +69% | +$543K |
|
2419
CALL
Lazard
LAZ
$4.37B
| $1.42M | ﹤0.01% |
32,600
+17,200
| +112% | +$805K |
|
2420
PUT
Cheesecake Factory
CAKE
$4.21B
| $1.42M | ﹤0.01% |
36,300
-13,600
| -27% | -$573K |
|
|
OZON
2421
CALL
DELISTED
Ozon Holdings PLC American Depositary Shares, each ADS representing one ordinary share
OZON
| $1.42M | ﹤0.01% |
48,000
-81,500
| -63% | -$3.37M |
|
2422
CALL
BCE
BCE
$19.9B
| $1.42M | ﹤0.01% |
27,300
-2,800
| -9% | -$143K |
|
2423
PUT
Macerich
MAC
$7.32B
| $1.42M | ﹤0.01% |
82,200
-40,300
| -33% | -$755K |
|
2424
PUT
Paylocity
PCTY
$6.71B
| $1.42M | ﹤0.01% |
6,000
+400
| +7% | +$106K |
|
2425
Alight
ALIT
$497M
| $1.42M | ﹤0.01% |
+6,545
| New | +$1.42M |
|
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.