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 | |
|---|---|---|---|---|---|---|
|
CYBR
2201
DELISTED
CyberArk
CYBR
| $1.71M | ﹤0.01% |
9,854
-2,844
| -22% | -$499K |
|
2202
iShares US Medical Devices ETF
IHI
$3.02B
| $1.71M | ﹤0.01% |
+25,895
| New | +$1.66M |
|
2203
CALL
HDFC Bank
HDB
$119B
| $1.7M | ﹤0.01% |
52,400
-15,000
| -22% | -$525K |
|
|
NEWR
2204
PUT
DELISTED
New Relic, Inc.
NEWR
| $1.7M | ﹤0.01% |
15,500
+10,700
| +223% | +$1.03M |
|
2205
CALL
Icon
ICLR
$12.8B
| $1.7M | ﹤0.01% |
5,500
+4,800
| +686% | +$1.34M |
|
2206
CALL
Rayonier
RYN
$6.49B
| $1.7M | ﹤0.01% |
46,514
-20,391
| -30% | -$709K |
|
2207
CALL
SM Energy
SM
$7.96B
| $1.7M | ﹤0.01% |
57,800
+18,800
| +48% | +$587K |
|
2208
CALL
UWM Holdings
UWMC
$621M
| $1.7M | ﹤0.01% |
287,800
-512,700
| -64% | -$3.46M |
|
|
VIP
2209
PUT
Vulcan Infrastructure and Power Inc. Class A Common Stock
VIP
$44.4M
| $1.7M | ﹤0.01% |
+10,610
| New | +$2.23M |
|
2210
HSBC
HSBC
$355B
| $1.7M | ﹤0.01% |
56,355
+7,891
| +16% | +$230K |
|
2211
PUT
Leggett & Platt
LEG
$1.52B
| $1.7M | ﹤0.01% |
41,200
+31,700
| +334% | +$1.38M |
|
2212
PUT
Impinj
PI
$3.89B
| $1.69M | ﹤0.01% |
19,100
+14,200
| +290% | +$1.03M |
|
2213
PUT
Post Holdings
POST
$4.12B
| $1.69M | ﹤0.01% |
22,920
+18,336
| +400% | +$1.26M |
|
|
OPTU
2214
CALL
Optimum Communications Inc
OPTU
$316M
| $1.69M | ﹤0.01% |
104,200
+65,900
| +172% | +$1.12M |
|
|
WOW
2215
CALL
DELISTED
WideOpenWest
WOW
| $1.68M | ﹤0.01% |
78,100
+70,300
| +901% | +$1.4M |
|
2216
CALL
Comstock Resources
CRK
$3.97B
| $1.68M | ﹤0.01% |
207,600
+178,900
| +623% | +$1.63M |
|
2217
CALL
Pentair
PNR
$10.2B
| $1.68M | ﹤0.01% |
23,000
+15,100
| +191% | +$1.11M |
|
2218
Innoviz Technologies
INVZ
$135M
| $1.68M | ﹤0.01% |
264,776
+262,571
| +11,908% | +$1.51M |
|
2219
CALL
Magna International
MGA
$17.9B
| $1.68M | ﹤0.01% |
20,700
-73,400
| -78% | -$5.97M |
|
2220
PUT
GoDaddy
GDDY
$12.3B
| $1.67M | ﹤0.01% |
19,700
-49,100
| -71% | -$3.51M |
|
2221
McKesson
MCK
$98.5B
| $1.67M | ﹤0.01% |
6,726
-3,838
| -36% | -$843K |
|
2222
PUT
Gold Fields
GFI
$29.2B
| $1.67M | ﹤0.01% |
151,600
+8,300
| +6% | +$82.8K |
|
|
ARVL
2223
CALL
DELISTED
Arrival Ordinary Shares
ARVL
| $1.67M | ﹤0.01% |
4,492
+1,308
| +41% | +$768K |
|
2224
CALL
Alpha Pro Tech
APT
$50.4M
| $1.67M | ﹤0.01% |
279,000
+262,300
| +1,571% | +$1.53M |
|
|
SNP
2225
PUT
DELISTED
CHINA PETROLEUM & CHEMICAL CORPORATION ADS (REP 100 ORDINARY H SHARES)
SNP
| $1.67M | ﹤0.01% |
35,800
+500
| +1% | +$24.2K |
|
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.