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 | |
|---|---|---|---|---|---|---|
|
OIL
4226
DELISTED
iPath Pure Beta Crude Oil ETN
OIL
| $375K | ﹤0.01% |
+15,972
| New | +$375K |
|
4227
Aldeyra Therapeutics
ALDX
$97.1M
| $374K | ﹤0.01% |
93,739
+72,929
| +350% | +$556K |
|
4228
CALL
STAAR Surgical
STAA
$1.19B
| $374K | ﹤0.01% |
4,100
+3,000
| +273% | +$322K |
|
4229
PUT
Xeris Biopharma Holdings
XERS
$1.45B
| $374K | ﹤0.01% |
127,900
+19,400
| +18% | +$41.9K |
|
4230
PUT
Archer Aviation
ACHR
$3.42B
| $373K | ﹤0.01% |
+61,800
| New | +$409K |
|
4231
PUT
POSCO
PKX
$14.7B
| $373K | ﹤0.01% |
6,400
+6,200
| +3,100% | +$385K |
|
4232
CALL
Tootsie Roll Industries
TR
$2.97B
| $373K | ﹤0.01% |
11,941
-49,053
| -80% | -$1.42M |
|
|
YELL
4233
CALL
DELISTED
Yellow Corporation Common Stock
YELL
| $373K | ﹤0.01% |
29,700
-2,100
| -7% | -$22.9K |
|
|
INN
4234
CALL
Summit Hotel Properties
INN
$766M
| $372K | ﹤0.01% |
38,200
+27,500
| +257% | +$267K |
|
4235
PUT
RenaissanceRe
RNR
$13.8B
| $372K | ﹤0.01% |
2,200
+2,000
| +1,000% | +$313K |
|
|
JJT
4236
PUT
DELISTED
iPath Series B Bloomberg Tin Subindex Total ReturnSM ETN
JJT
| $372K | ﹤0.01% |
6,900
-5,000
| -42% | -$566K |
|
4237
PUT
Amcor
AMCR
$21.2B
| $371K | ﹤0.01% |
6,180
-2,040
| -25% | -$121K |
|
4238
CALL
Cricut
CRCT
$1.01B
| $371K | ﹤0.01% |
+16,800
| New | +$426K |
|
4239
Nasdaq
NDAQ
$53.4B
| $371K | ﹤0.01% |
+5,310
| New | +$362K |
|
|
SA
4240
PUT
Seabridge Gold
SA
$2.72B
| $371K | ﹤0.01% |
22,500
+3,700
| +20% | +$66.2K |
|
|
PLAN
4241
DELISTED
Anaplan, Inc.
PLAN
| $371K | ﹤0.01% |
+8,108
| New | +$447K |
|
4242
A10 Networks
ATEN
$2.07B
| $370K | ﹤0.01% |
22,347
+17,857
| +398% | +$271K |
|
4243
CALL
Highwoods Properties
HIW
$3.79B
| $370K | ﹤0.01% |
8,300
+6,300
| +315% | +$285K |
|
4244
CALL
Itron
ITRI
$4.54B
| $370K | ﹤0.01% |
5,400
+900
| +20% | +$63.3K |
|
4245
PUT
Repligen
RGEN
$6.91B
| $370K | ﹤0.01% |
1,400
+500
| +56% | +$135K |
|
4246
PUT
Travel + Leisure Co
TNL
$4.76B
| $370K | ﹤0.01% |
6,700
+2,700
| +68% | +$144K |
|
|
VRAY
4247
CALL
DELISTED
ViewRay, Inc.
VRAY
| $370K | ﹤0.01% |
67,300
-8,800
| -12% | -$53.6K |
|
|
HIVE
4248
PUT
HIVE Digital Technologies
HIVE
$679M
| $369K | ﹤0.01% |
+28,000
| New | +$481K |
|
4249
KNOT Offshore Partners
KNOP
$354M
| $369K | ﹤0.01% |
+27,657
| New | +$465K |
|
|
ACH
4250
CALL
Accendra Health
ACH
$254M
| $369K | ﹤0.01% |
8,500
+3,500
| +70% | +$137K |
|
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.