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 | |
|---|---|---|---|---|---|---|
|
BLDP
3226
CALL
Ballard Power Systems
BLDP
$865M
| $771K | ﹤0.01% |
61,400
-123,200
| -67% | -$1.86M |
|
|
CONN
3227
PUT
DELISTED
Conn's Inc.
CONN
| $771K | ﹤0.01% |
32,800
+14,400
| +78% | +$325K |
|
3228
PUT
Alto Ingredients
ALTO
$349M
| $770K | ﹤0.01% |
160,100
-43,800
| -21% | -$230K |
|
3229
Global X Cybersecurity ETF
BUG
$1.28B
| $770K | ﹤0.01% |
24,268
+15,129
| +166% | +$488K |
|
3230
Equinox Gold
EQX
$7.51B
| $770K | ﹤0.01% |
113,949
-27,742
| -20% | -$203K |
|
3231
Ares Capital
ARCC
$13.6B
| $769K | ﹤0.01% |
36,306
+20,348
| +128% | +$423K |
|
|
FBRT
3232
PUT
Franklin BSP Realty Trust
FBRT
$603M
| $769K | ﹤0.01% |
+51,500
| New | +$832K |
|
3233
CALL
Trex
TREX
$4.57B
| $769K | ﹤0.01% |
5,700
+800
| +16% | +$96K |
|
|
LL
3234
PUT
DELISTED
LL Flooring Holdings, Inc.
LL
| $769K | ﹤0.01% |
45,100
+20,700
| +85% | +$365K |
|
3235
PUT
ArcBest
ARCB
$3.31B
| $767K | ﹤0.01% |
6,400
-2,600
| -29% | -$265K |
|
|
MAG
3236
CALL
DELISTED
MAG Silver
MAG
| $767K | ﹤0.01% |
49,000
+13,400
| +38% | +$235K |
|
3237
Invesco S&P SmallCap 600 Pure Value ETF
RZV
$293M
| $767K | ﹤0.01% |
+7,972
| New | +$779K |
|
|
JJT
3238
CALL
DELISTED
iPath Series B Bloomberg Tin Subindex Total ReturnSM ETN
JJT
| $767K | ﹤0.01% |
13,100
-33,200
| -72% | -$3.76M |
|
|
IPOF
3239
PUT
DELISTED
Social Capital Hedosophia Holdings Corp. VI
IPOF
| $766K | ﹤0.01% |
75,200
-741,000
| -91% | -$7.62M |
|
3240
Editas Medicine
EDIT
$411M
| $764K | ﹤0.01% |
28,796
-67,080
| -70% | -$2.31M |
|
3241
CALL
Iridium Communications
IRDM
$4.87B
| $763K | ﹤0.01% |
18,500
-21,000
| -53% | -$848K |
|
|
ETRN
3242
CALL
DELISTED
Equitrans Midstream Corporation Common Stock
ETRN
| $763K | ﹤0.01% |
73,800
+29,200
| +65% | +$303K |
|
3243
CALL
Groupon
GRPN
$1.05B
| $762K | ﹤0.01% |
37,400
-84,100
| -69% | -$1.96M |
|
|
NSLR
3244
CALL
Neostellar Capital Corp
NSLR
$270M
| $762K | ﹤0.01% |
58,900
+19,500
| +49% | +$257K |
|
|
GRTS
3245
DELISTED
Gritstone bio, Inc. Common Stock
GRTS
| $762K | ﹤0.01% |
+59,327
| New | +$657K |
|
3246
American Well
AMWL
$185M
| $760K | ﹤0.01% |
6,298
+2,414
| +62% | +$368K |
|
3247
CALL
Hippo Holdings
HIPO
$759M
| $760K | ﹤0.01% |
+10,756
| New | +$1M |
|
|
TSE
3248
CALL
DELISTED
Trinseo
TSE
| $760K | ﹤0.01% |
14,500
+5,400
| +59% | +$292K |
|
3249
PUT
Realty Income
O
$61.1B
| $759K | ﹤0.01% |
26,200
-37,062
| -59% | -$2.55M |
|
3250
Teucrium Corn Fund
CORN
$179M
| $758K | ﹤0.01% |
35,213
+25,280
| +255% | +$534K |
|
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.