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 | Miscellaneous | 97.43% |
| 2 | Technology | 0.63% |
| 3 | Consumer Discretionary | 0.43% |
| 4 | Healthcare | 0.36% |
| 5 | Communication Services | 0.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1301
PUT
Tencent Music
TME
$13.5B
| $4.42M | ﹤0.01% |
645,800
-271,600
| -30% | -$2M |
|
1302
CALL
Ovintiv
OVV
$17.9B
| $4.42M | ﹤0.01% |
179,700
+116,160
| +183% | +$4.15M |
|
1303
PUT
Elanco Animal Health
ELAN
$12.2B
| $4.42M | ﹤0.01% |
155,600
+80,400
| +107% | +$2.5M |
|
1304
VanEck Junior Gold Miners ETF
GDXJ
$9.59B
| $4.41M | ﹤0.01% |
105,254
+7,739
| +8% | +$331K |
|
1305
CALL
Mettler-Toledo International
MTD
$27B
| $4.41M | ﹤0.01% |
+2,600
| New | +$3.93M |
|
|
NVO
1306
CALL
Novo Nordisk
NVO
$206B
| $4.41M | ﹤0.01% |
78,800
+15,600
| +25% | +$845K |
|
|
TTM.RT
1307
CALL
DELISTED
TATA MOTORS LIMITED RT PUR ADR
TTM.RT
| $4.39M | ﹤0.01% |
136,700
+76,700
| +128% | +$2.46M |
|
1308
PUT
Franco-Nevada
FNV
$51.3B
| $4.38M | ﹤0.01% |
31,700
-8,700
| -22% | -$1.2M |
|
1309
CALL
Norfolk Southern
NSC
$74B
| $4.38M | ﹤0.01% |
14,700
-12,600
| -46% | -$3.52M |
|
|
PXD
1310
DELISTED
Pioneer Natural Resource Co.
PXD
| $4.37M | ﹤0.01% |
+24,025
| New | +$4.42M |
|
|
SFIX
1311
CALL
Stitch Fix
SFIX
$407M
| $4.36M | ﹤0.01% |
230,700
+131,000
| +131% | +$3.75M |
|
1312
Target
TGT
$74.7B
| $4.36M | ﹤0.01% |
18,858
+16,406
| +669% | +$3.99M |
|
1313
CALL
Cincinnati Financial
CINF
$26.3B
| $4.36M | ﹤0.01% |
38,300
+36,300
| +1,815% | +$4.29M |
|
1314
CALL
PennyMac Financial
PFSI
$3.81B
| $4.36M | ﹤0.01% |
62,500
+15,700
| +34% | +$1.04M |
|
1315
PUT
Interactive Brokers
IBKR
$42B
| $4.36M | ﹤0.01% |
219,600
-226,800
| -51% | -$4.22M |
|
1316
CALL
FIGS
FIGS
$2.4B
| $4.36M | ﹤0.01% |
158,200
+110,600
| +232% | +$3.64M |
|
1317
CALL
Bloom Energy
BE
$74.5B
| $4.36M | ﹤0.01% |
198,700
+124,700
| +169% | +$3.15M |
|
1318
CALL
Canadian Solar
CSIQ
$898M
| $4.35M | ﹤0.01% |
139,000
+2,000
| +1% | +$71.6K |
|
1319
Zillow
Z
$7.78B
| $4.34M | ﹤0.01% |
67,914
+53,214
| +362% | +$3.83M |
|
1320
PUT
ICICI Bank
IBN
$109B
| $4.33M | ﹤0.01% |
219,100
+72,100
| +49% | +$1.42M |
|
1321
PUT
Vistra
VST
$50.1B
| $4.33M | ﹤0.01% |
190,000
+113,900
| +150% | +$2.28M |
|
1322
CALL
Regions Financial
RF
$25.9B
| $4.33M | ﹤0.01% |
198,400
+123,300
| +164% | +$2.82M |
|
1323
CALL
Star Bulk Carriers
SBLK
$3.62B
| $4.31M | ﹤0.01% |
190,300
+103,800
| +120% | +$2.18M |
|
1324
CALL
Doximity
DOCS
$4.7B
| $4.31M | ﹤0.01% |
+86,000
| New | +$5.6M |
|
1325
PUT
Oneok
OKE
$60.2B
| $4.31M | ﹤0.01% |
73,300
-2,900
| -4% | -$180K |
|
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's Q4 2021 filing shows 2,268 new, 3,786 increased, 4,257 reduced and 1,643 closed positions. Its largest new stake was iShares China Large-Cap ETF: 902,666 shares worth $33M. The largest sale was AMC Entertainment Holdings, an estimated $49.5M.
By sector, the portfolio is most concentrated in Miscellaneous at 97% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- 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 2,268 new positions and closed 1,643 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.