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 | |
|---|---|---|---|---|---|---|
1501
Dow Inc
DOW
$21.5B
| $3.54M | ﹤0.01% |
62,355
-3,043
| -5% | -$174K |
|
1502
iShares Russell 1000 Growth ETF
IWF
$126B
| $3.52M | ﹤0.01% |
46,144
-2,488
| -5% | -$184K |
|
1503
PUT
Equifax
EFX
$20.3B
| $3.51M | ﹤0.01% |
12,000
+8,100
| +208% | +$2.25M |
|
1504
PUT
Invesco DB US Dollar Index Bullish Fund
UUP
$299M
| $3.51M | ﹤0.01% |
137,400
-90,000
| -40% | -$2.3M |
|
1505
Viatris
VTRS
$19.2B
| $3.51M | ﹤0.01% |
259,394
+176,059
| +211% | +$2.35M |
|
1506
CALL
Synaptics
SYNA
$3.85B
| $3.5M | ﹤0.01% |
12,100
+1,700
| +16% | +$406K |
|
|
CS
1507
CALL
DELISTED
Credit Suisse Group
CS
| $3.48M | ﹤0.01% |
360,800
+144,600
| +67% | +$1.45M |
|
1508
PUT
Coherent
COHR
$58.6B
| $3.48M | ﹤0.01% |
50,900
-27,100
| -35% | -$1.7M |
|
1509
CALL
News Corp Class B
NWS
$17.9B
| $3.47M | ﹤0.01% |
155,500
+69,000
| +80% | +$1.58M |
|
1510
Halliburton
HAL
$31.1B
| $3.47M | ﹤0.01% |
151,786
+66,662
| +78% | +$1.58M |
|
1511
QuantumScape Corp
QS
$3.43B
| $3.47M | ﹤0.01% |
156,353
-59,349
| -28% | -$1.63M |
|
1512
CALL
Charles River Laboratories
CRL
$13.5B
| $3.47M | ﹤0.01% |
9,200
+3,200
| +53% | +$1.24M |
|
|
SVFAU
1513
CALL
DELISTED
SVF Investment Corp. Unit
SVFAU
| $3.46M | ﹤0.01% |
344,900
+333,800
| +3,007% | +$3.42M |
|
1514
CALL
Lincoln National
LNC
$8.66B
| $3.46M | ﹤0.01% |
50,700
-15,400
| -23% | -$1.09M |
|
|
GGPI
1515
PUT
DELISTED
Gores Guggenheim, Inc. Class A Common Stock
GGPI
| $3.46M | ﹤0.01% |
+295,700
| New | +$3.4M |
|
1516
CALL
Yum! Brands
YUM
$40.8B
| $3.46M | ﹤0.01% |
24,900
-22,800
| -48% | -$2.92M |
|
|
MNDT
1517
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $3.45M | ﹤0.01% |
196,960
+53,655
| +37% | +$943K |
|
1518
Skyworks Solutions
SWKS
$11.3B
| $3.45M | ﹤0.01% |
22,246
+3,418
| +18% | +$547K |
|
1519
PUT
Abercrombie & Fitch
ANF
$6.75B
| $3.45M | ﹤0.01% |
99,000
+89,600
| +953% | +$3.5M |
|
|
LFTR
1520
CALL
DELISTED
Lefteris Acquisition Corp. Class A Common Stock
LFTR
| $3.45M | ﹤0.01% |
351,700
+152,700
| +77% | +$1.5M |
|
1521
PUT
CACI
CACI
$13.6B
| $3.44M | ﹤0.01% |
+12,800
| New | +$3.51M |
|
|
CLR
1522
PUT
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $3.44M | ﹤0.01% |
76,900
-24,000
| -24% | -$1.14M |
|
1523
PUT
Cardinal Health
CAH
$56.9B
| $3.44M | ﹤0.01% |
66,800
-19,600
| -23% | -$961K |
|
1524
CALL
Carlyle Group
CG
$16.7B
| $3.43M | ﹤0.01% |
62,500
+5,700
| +10% | +$310K |
|
1525
CALL
BridgeBio Pharma
BBIO
$14.8B
| $3.43M | ﹤0.01% |
205,600
+205,400
| +102,700% | +$8.69M |
|
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.