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 | |
|---|---|---|---|---|---|---|
4301
PUT
Greif
GEF
$4.93B
| $356K | ﹤0.01% |
5,900
+1,600
| +37% | +$104K |
|
4302
CALL
G-III Apparel Group
GIII
$1.54B
| $356K | ﹤0.01% |
12,900
-11,100
| -46% | -$324K |
|
4303
CALL
Lithia Motors
LAD
$8.49B
| $356K | ﹤0.01% |
1,200
-6,200
| -84% | -$1.92M |
|
4304
PUT
MeiraGTx Holdings
MGTX
$1.1B
| $356K | ﹤0.01% |
15,000
+10,900
| +266% | +$209K |
|
4305
CALL
Sabra Healthcare REIT
SBRA
$5.34B
| $356K | ﹤0.01% |
26,300
-13,300
| -34% | -$188K |
|
|
TACO
4306
PUT
DELISTED
Del Taco Restaurants, Inc. Common Stock
TACO
| $356K | ﹤0.01% |
28,600
-24,800
| -46% | -$239K |
|
4307
CALL
Advanced Energy
AEIS
$11.8B
| $355K | ﹤0.01% |
3,900
+2,000
| +105% | +$178K |
|
4308
CALL
Allegiant Air
ALGT
$2.66B
| $355K | ﹤0.01% |
1,900
+1,000
| +111% | +$186K |
|
4309
PUT
Leidos
LDOS
$14.3B
| $355K | ﹤0.01% |
4,000
-400
| -9% | -$37.5K |
|
|
PCH
4310
CALL
DELISTED
PotlatchDeltic
PCH
| $355K | ﹤0.01% |
5,900
+1,000
| +20% | +$56.1K |
|
|
HMHC
4311
DELISTED
Houghton Mifflin Harcourt Company
HMHC
| $355K | ﹤0.01% |
+22,100
| New | +$336K |
|
|
CFRX
4312
CALL
DELISTED
ContraFect Corporation
CFRX
| $355K | ﹤0.01% |
1,690
+1,075
| +175% | +$295K |
|
|
EVRI
4313
CALL
DELISTED
Everi Holdings
EVRI
| $354K | ﹤0.01% |
16,600
-16,300
| -50% | -$371K |
|
4314
GDS Holdings
GDS
$6.52B
| $354K | ﹤0.01% |
7,508
+6,620
| +745% | +$365K |
|
4315
Heron Therapeutics
HRTX
$94.8M
| $354K | ﹤0.01% |
38,853
+36,847
| +1,837% | +$376K |
|
|
LTCH
4316
CALL
DELISTED
Latch, Inc. Common Stock
LTCH
| $354K | ﹤0.01% |
46,800
+13,500
| +41% | +$119K |
|
|
IRNT
4317
PUT
DELISTED
IronNet, Inc.
IRNT
| $354K | ﹤0.01% |
+84,500
| New | +$788K |
|
4318
CALL
Titan Machinery
TITN
$404M
| $353K | ﹤0.01% |
10,500
-100,000
| -90% | -$3.11M |
|
4319
CALL
Ametek
AME
$55.6B
| $352K | ﹤0.01% |
2,400
-12,100
| -83% | -$1.66M |
|
4320
CALL
Cullen/Frost Bankers
CFR
$10.5B
| $352K | ﹤0.01% |
2,800
+1,000
| +56% | +$129K |
|
4321
PUT
Murphy Oil
MUR
$5.58B
| $352K | ﹤0.01% |
13,500
-82,300
| -86% | -$2.28M |
|
|
ONC
4322
PUT
BeOne Medicines Ltd
ONC
$32.8B
| $352K | ﹤0.01% |
1,300
-1,200
| -48% | -$405K |
|
|
HIBB
4323
CALL
DELISTED
Hibbett, Inc. Common Stock
HIBB
| $352K | ﹤0.01% |
4,900
-11,200
| -70% | -$892K |
|
|
SIVB
4324
DELISTED
SVB Financial Group
SIVB
| $352K | ﹤0.01% |
+519
| New | +$366K |
|
4325
Aclaris Therapeutics
ACRS
$728M
| $351K | ﹤0.01% |
24,199
+19,956
| +470% | +$302K |
|
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.