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 | |
|---|---|---|---|---|---|---|
|
DNB
1326
CALL
DELISTED
Dun & Bradstreet
DNB
| $4.31M | ﹤0.01% |
210,200
+181,100
| +622% | +$3.45M |
|
1327
CALL
indie Semiconductor
INDI
$733M
| $4.3M | ﹤0.01% |
359,100
+177,400
| +98% | +$2.25M |
|
1328
PUT
Sysco
SYY
$39.7B
| $4.3M | ﹤0.01% |
54,700
-16,600
| -23% | -$1.28M |
|
1329
CALL
Teradata
TDC
$2.68B
| $4.28M | ﹤0.01% |
100,800
+48,500
| +93% | +$2.39M |
|
1330
CALL
Jabil
JBL
$32.8B
| $4.28M | ﹤0.01% |
60,800
+6,100
| +11% | +$385K |
|
1331
PUT
Kimberly-Clark
KMB
$36.4B
| $4.27M | ﹤0.01% |
29,900
-45,300
| -60% | -$6.1M |
|
1332
CALL
STMicroelectronics
STM
$46B
| $4.27M | ﹤0.01% |
87,400
-83,000
| -49% | -$3.93M |
|
1333
Teva Pharmaceuticals
TEVA
$35.9B
| $4.25M | ﹤0.01% |
531,325
+356,602
| +204% | +$3.22M |
|
1334
CALL
Fastenal
FAST
$54B
| $4.25M | ﹤0.01% |
132,800
+91,200
| +219% | +$2.69M |
|
1335
CALL
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $4.24M | ﹤0.01% |
8,200
-4,000
| -33% | -$2.04M |
|
|
MNDT
1336
PUT
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $4.24M | ﹤0.01% |
241,900
+56,000
| +30% | +$984K |
|
|
LOGC
1337
CALL
DELISTED
ContextLogic
LOGC
| $4.23M | ﹤0.01% |
45,387
-9,143
| -17% | -$1.21M |
|
1338
JD.com
JD
$40.8B
| $4.23M | ﹤0.01% |
60,403
-36,618
| -38% | -$2.9M |
|
1339
CALL
Nasdaq
NDAQ
$52.1B
| $4.22M | ﹤0.01% |
60,300
+32,700
| +118% | +$2.23M |
|
1340
Illumina
ILMN
$29.4B
| $4.21M | ﹤0.01% |
11,389
+7,964
| +233% | +$3.02M |
|
|
SIX
1341
CALL
DELISTED
Six Flags Entertainment Corp.
SIX
| $4.21M | ﹤0.01% |
98,900
+43,400
| +78% | +$1.81M |
|
1342
CALL
Cedar Fair
FUN
$1.78B
| $4.21M | ﹤0.01% |
84,100
-75,300
| -47% | -$3.6M |
|
1343
CALL
Vistra
VST
$55.1B
| $4.21M | ﹤0.01% |
184,900
-38,900
| -17% | -$780K |
|
1344
PUT
FMC
FMC
$1.42B
| $4.21M | ﹤0.01% |
38,300
+22,500
| +142% | +$2.26M |
|
1345
PUT
Cencora
COR
$60.3B
| $4.2M | ﹤0.01% |
31,600
+8,200
| +35% | +$1.01M |
|
|
EVBG
1346
CALL
DELISTED
Everbridge, Inc. Common Stock
EVBG
| $4.19M | ﹤0.01% |
62,300
+55,500
| +816% | +$6.71M |
|
1347
PUT
Elastic
ESTC
$6.1B
| $4.18M | ﹤0.01% |
34,000
+7,100
| +26% | +$1.07M |
|
1348
iShares US Home Construction ETF
ITB
$2.41B
| $4.18M | ﹤0.01% |
50,471
+22,076
| +78% | +$1.66M |
|
1349
CALL
BioMarin Pharmaceuticals
BMRN
$11.5B
| $4.18M | ﹤0.01% |
47,300
+12,300
| +35% | +$1.01M |
|
1350
PUT
Camping World
CWH
$363M
| $4.18M | ﹤0.01% |
103,400
-41,100
| -28% | -$1.66M |
|
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.