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 | |
|---|---|---|---|---|---|---|
1576
iShares Core S&P 500 ETF
IVV
$876B
| $3.21M | ﹤0.01% |
6,728
+4,369
| +185% | +$2.01M |
|
1577
PUT
AvalonBay Communities
AVB
$27.1B
| $3.21M | ﹤0.01% |
12,700
-13,600
| -52% | -$3.24M |
|
1578
CALL
McKesson
MCK
$98.5B
| $3.21M | ﹤0.01% |
12,900
+3,900
| +43% | +$856K |
|
1579
CALL
Schwab US Broad Market ETF
SCHB
$42.8B
| $3.19M | ﹤0.01% |
239,400
-82,800
| -26% | -$1.52M |
|
|
NBIS
1580
PUT
Nebius Group N.V.
NBIS
$47.7B
| $3.19M | ﹤0.01% |
52,700
+8,100
| +18% | +$597K |
|
1581
lululemon athletica
LULU
$13B
| $3.19M | ﹤0.01% |
8,137
-1,919
| -19% | -$820K |
|
1582
PUT
Cooper Companies
COO
$13.7B
| $3.18M | ﹤0.01% |
30,400
+1,600
| +6% | +$163K |
|
|
TWTR
1583
DELISTED
Twitter, Inc.
TWTR
| $3.18M | ﹤0.01% |
+73,640
| New | +$3.83M |
|
1584
CALL
United Therapeutics
UTHR
$26.3B
| $3.18M | ﹤0.01% |
14,700
-10,300
| -41% | -$2.02M |
|
1585
CALL
Aecom
ACM
$9.07B
| $3.17M | ﹤0.01% |
41,000
+34,600
| +541% | +$2.43M |
|
1586
CALL
Amplify Online Retail ETF
IBUY
$106M
| $3.17M | ﹤0.01% |
81,700
-3,100
| -4% | -$318K |
|
1587
PUT
Idexx Laboratories
IDXX
$42.9B
| $3.16M | ﹤0.01% |
4,800
-3,200
| -40% | -$2.01M |
|
1588
CALL
Dover
DOV
$27.2B
| $3.16M | ﹤0.01% |
17,400
+15,900
| +1,060% | +$2.7M |
|
1589
PUT
Appian
APPN
$1.74B
| $3.16M | ﹤0.01% |
48,400
-10,800
| -18% | -$898K |
|
1590
CALL
AGCO
AGCO
$8.78B
| $3.15M | ﹤0.01% |
27,200
+26,600
| +4,433% | +$3.23M |
|
|
1591
AMC Entertainment Holdings
AMC
$2.03B
| $3.15M | ﹤0.01% |
11,575
-140,669
| -92% | -$49.5M |
|
1592
CALL
Hartford Financial Services
HIG
$38.5B
| $3.15M | ﹤0.01% |
45,600
-12,600
| -22% | -$889K |
|
1593
CALL
Playboy Inc
PLBY
$141M
| $3.15M | ﹤0.01% |
118,200
+62,200
| +111% | +$1.88M |
|
1594
PUT
Five Below
FIVE
$11.2B
| $3.14M | ﹤0.01% |
15,200
-2,600
| -15% | -$511K |
|
1595
Nutrien
NTR
$32.7B
| $3.14M | ﹤0.01% |
41,776
-5,077
| -11% | -$355K |
|
1596
PUT
Boot Barn
BOOT
$4.55B
| $3.14M | ﹤0.01% |
25,500
+22,700
| +811% | +$2.56M |
|
|
SAGE
1597
PUT
DELISTED
Sage Therapeutics
SAGE
| $3.13M | ﹤0.01% |
73,700
+5,100
| +7% | +$214K |
|
|
IAA
1598
CALL
DELISTED
IAA, Inc. Common Stock
IAA
| $3.12M | ﹤0.01% |
61,700
-32,100
| -34% | -$1.71M |
|
1599
PUT
Eversource Energy
ES
$28.2B
| $3.12M | ﹤0.01% |
34,300
+33,400
| +3,711% | +$2.87M |
|
1600
PUT
Brinker International
EAT
$8.02B
| $3.11M | ﹤0.01% |
85,000
+33,400
| +65% | +$1.38M |
|
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.