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 | |
|---|---|---|---|---|---|---|
|
CTEV
3726
Claritev Corp
CTEV
$386M
| $522K | ﹤0.01% |
+2,951
| New | +$526K |
|
3727
CALL
Frontline
FRO
$8.63B
| $521K | ﹤0.01% |
73,700
+20,600
| +39% | +$164K |
|
|
TCDA
3728
CALL
DELISTED
Tricida, Inc. Common Stock
TCDA
| $521K | ﹤0.01% |
54,600
+49,700
| +1,014% | +$321K |
|
|
ESPR
3729
CALL
DELISTED
Esperion Therapeutics
ESPR
| $520K | ﹤0.01% |
104,000
+7,800
| +8% | +$62.5K |
|
3730
CALL
Floor & Decor
FND
$6.14B
| $520K | ﹤0.01% |
4,000
-3,700
| -48% | -$477K |
|
3731
iShares US Technology ETF
IYW
$23B
| $520K | ﹤0.01% |
4,535
-2,606
| -36% | -$289K |
|
|
JAMF
3732
CALL
DELISTED
Jamf
JAMF
| $520K | ﹤0.01% |
13,700
| – | – |
|
3733
PUT
WisdomTree
WT
$2.97B
| $520K | ﹤0.01% |
85,000
+72,600
| +585% | +$450K |
|
|
ONEM
3734
DELISTED
1Life Healthcare
ONEM
| $520K | ﹤0.01% |
+29,620
| New | +$575K |
|
|
MGLN
3735
DELISTED
Magellan Health Services, Inc.
MGLN
| $520K | ﹤0.01% |
5,478
+154
| +3% | +$14.6K |
|
3736
PUT
CenterPoint Energy
CNP
$28.8B
| $519K | ﹤0.01% |
18,600
+11,900
| +178% | +$318K |
|
3737
PUT
Denison Mines
DNN
$2.49B
| $519K | ﹤0.01% |
379,300
-40,400
| -10% | -$66.3K |
|
3738
PUT
Healthpeak Properties
DOC
$15.7B
| $519K | ﹤0.01% |
14,400
+1,300
| +10% | +$44.8K |
|
3739
CALL
Gaia
GAIA
$47.6M
| $519K | ﹤0.01% |
60,600
+58,600
| +2,930% | +$546K |
|
3740
PUT
NNN REIT
NNN
$9.37B
| $519K | ﹤0.01% |
10,800
-20,500
| -65% | -$940K |
|
3741
Sabesp
SBS
$19.4B
| $519K | ﹤0.01% |
364,958
-397,135
| -52% | -$516K |
|
3742
PUT
Vir Biotechnology
VIR
$1.49B
| $519K | ﹤0.01% |
12,400
+9,992
| +415% | +$391K |
|
|
TUP
3743
PUT
DELISTED
Tupperware Brands Corporation
TUP
| $519K | ﹤0.01% |
34,000
-17,800
| -34% | -$331K |
|
|
TCDA
3744
DELISTED
Tricida, Inc. Common Stock
TCDA
| $519K | ﹤0.01% |
54,311
+44,046
| +429% | +$284K |
|
3745
CALL
BeyondSpring
BYSI
$48.9M
| $518K | ﹤0.01% |
114,400
+109,700
| +2,334% | +$1.24M |
|
3746
CALL
PJT Partners
PJT
$4.47B
| $518K | ﹤0.01% |
+7,000
| New | +$558K |
|
3747
PUT
Skywest
SKYW
$4.51B
| $518K | ﹤0.01% |
13,200
+8,700
| +193% | +$389K |
|
|
WEBR
3748
PUT
DELISTED
Weber Inc.
WEBR
| $518K | ﹤0.01% |
+40,100
| New | +$595K |
|
3749
CALL
Atossa Therapeutics
ATOS
$24.1M
| $517K | ﹤0.01% |
21,580
-68,427
| -76% | -$2.5M |
|
3750
PUT
iRhythm Holdings
IRTC
$3.86B
| $517K | ﹤0.01% |
4,400
-16,000
| -78% | -$1.47M |
|
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.