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 | |
|---|---|---|---|---|---|---|
1551
PUT
NovoCure
NVCR
$2.04B
| $3.29M | ﹤0.01% |
43,800
+33,100
| +309% | +$3.32M |
|
|
DIDI
1552
PUT
DELISTED
DiDi Global Inc. American depositary shares, each four representing one Class A ordinary share
DIDI
| $3.28M | ﹤0.01% |
+659,500
| New | +$5.01M |
|
1553
PUT
Axalta
AXTA
$7.01B
| $3.28M | ﹤0.01% |
99,100
+62,200
| +169% | +$1.97M |
|
1554
CALL
Franklin Resources
BEN
$16.9B
| $3.28M | ﹤0.01% |
98,000
+92,500
| +1,682% | +$3.04M |
|
|
ROIC
1555
CALL
DELISTED
Retail Opportunity Investments Corp.
ROIC
| $3.28M | ﹤0.01% |
167,200
+76,600
| +85% | +$1.41M |
|
1556
CALL
Sonos
SONO
$1.75B
| $3.27M | ﹤0.01% |
109,700
-81,500
| -43% | -$2.59M |
|
1557
International Paper
IP
$22.3B
| $3.26M | ﹤0.01% |
69,366
-15,325
| -18% | -$756K |
|
1558
CALL
Kornit Digital
KRNT
$706M
| $3.26M | ﹤0.01% |
21,400
+10,300
| +93% | +$1.58M |
|
1559
Albemarle
ALB
$13.5B
| $3.26M | ﹤0.01% |
+13,936
| New | +$3.45M |
|
|
TGNA
1560
CALL
DELISTED
TEGNA Inc
TGNA
| $3.26M | ﹤0.01% |
175,500
+160,300
| +1,055% | +$3.21M |
|
1561
PUT
Universal Display
OLED
$3.71B
| $3.25M | ﹤0.01% |
19,700
+15,100
| +328% | +$2.49M |
|
1562
CALL
Alaska Air
ALK
$5.15B
| $3.25M | ﹤0.01% |
62,300
-4,600
| -7% | -$249K |
|
1563
CALL
Casella Waste Systems
CWST
$5.69B
| $3.25M | ﹤0.01% |
38,000
+36,300
| +2,135% | +$3.04M |
|
1564
Intercontinental Exchange
ICE
$82.4B
| $3.24M | ﹤0.01% |
+23,722
| New | +$3.14M |
|
1565
PUT
Radware
RDWR
$1.24B
| $3.24M | ﹤0.01% |
77,900
-191,900
| -71% | -$6.52M |
|
1566
PUT
Toyota
TM
$210B
| $3.24M | ﹤0.01% |
17,500
-2,600
| -13% | -$468K |
|
1567
CALL
HCI Group
HCI
$2.28B
| $3.24M | ﹤0.01% |
38,800
+28,700
| +284% | +$3.35M |
|
1568
CALL
FTAI Aviation
FTAI
$22.2B
| $3.23M | ﹤0.01% |
130,918
+85,952
| +191% | +$1.88M |
|
1569
CALL
Credit Acceptance
CACC
$6B
| $3.23M | ﹤0.01% |
4,700
+2,100
| +81% | +$1.35M |
|
1570
AMN Healthcare
AMN
$1.28B
| $3.23M | ﹤0.01% |
+26,407
| New | +$2.93M |
|
1571
PUT
Hershey
HSY
$35.4B
| $3.23M | ﹤0.01% |
16,700
-4,900
| -23% | -$887K |
|
|
MPT
1572
CALL
Medical Properties Trust
MPT
$2.89B
| $3.23M | ﹤0.01% |
136,600
+54,500
| +66% | +$1.17M |
|
1573
ProShares Ultra Bloomberg Crude Oil
UCO
$443M
| $3.22M | ﹤0.01% |
148,468
-7,372
| -5% | -$163K |
|
|
NUAN
1574
PUT
DELISTED
Nuance Communications, Inc.
NUAN
| $3.22M | ﹤0.01% |
58,200
-26,200
| -31% | -$1.45M |
|
1575
Booking.com
BKNG
$138B
| $3.21M | ﹤0.01% |
+33,500
| New | +$3.18M |
|
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.