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 | |
|---|---|---|---|---|---|---|
2601
PUT
Qiagen
QGEN
$8.53B
| $1.22M | ﹤0.01% |
20,747
+5,187
| +33% | +$297K |
|
2602
AbCellera Biologics
ABCL
$1.62B
| $1.22M | ﹤0.01% |
85,424
+57,142
| +202% | +$867K |
|
|
ZNTE
2603
CALL
DELISTED
Zanite Acquisition Corp. Class A Common Stock
ZNTE
| $1.22M | ﹤0.01% |
120,000
-158,800
| -57% | -$1.61M |
|
2604
CALL
Comtech Telecommunications
CMTL
$51.8M
| $1.22M | ﹤0.01% |
51,500
+34,500
| +203% | +$846K |
|
|
CMPS
2605
CALL
Compass Pathways
CMPS
$1.52B
| $1.22M | ﹤0.01% |
55,200
+40,800
| +283% | +$1.3M |
|
2606
PUT
Aldeyra Therapeutics
ALDX
$91.7M
| $1.22M | ﹤0.01% |
304,600
+300,000
| +6,522% | +$2.29M |
|
2607
Applovin
APP
$132B
| $1.22M | ﹤0.01% |
12,898
+5,411
| +72% | +$504K |
|
|
RBOT
2608
CALL
DELISTED
Vicarious Surgical
RBOT
| $1.22M | ﹤0.01% |
+3,817
| New | +$1.35M |
|
|
VISN
2609
PUT
Vistance Networks Inc
VISN
$2.66B
| $1.21M | ﹤0.01% |
109,900
-80,900
| -42% | -$887K |
|
|
MIME
2610
DELISTED
Mimecast Limited
MIME
| $1.21M | ﹤0.01% |
15,254
+10,639
| +231% | +$802K |
|
|
CTLP
2611
PUT
DELISTED
Cantaloupe
CTLP
| $1.21M | ﹤0.01% |
136,500
+6,600
| +5% | +$65.7K |
|
2612
United Airlines
UAL
$38.4B
| $1.21M | ﹤0.01% |
27,693
+25,193
| +1,008% | +$1.17M |
|
2613
Whirlpool
WHR
$2.42B
| $1.21M | ﹤0.01% |
+5,169
| New | +$1.14M |
|
2614
PUT
MasTec
MTZ
$26.7B
| $1.21M | ﹤0.01% |
13,100
-44,900
| -77% | -$4.1M |
|
2615
PUT
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.9B
| $1.21M | ﹤0.01% |
22,700
+5,500
| +32% | +$318K |
|
2616
PUT
LoveSac
LOVE
$239M
| $1.21M | ﹤0.01% |
18,200
+11,900
| +189% | +$872K |
|
|
SAFE
2617
Safehold
SAFE
$1.19B
| $1.21M | ﹤0.01% |
9,591
+8,462
| +750% | +$1.03M |
|
2618
PUT
ThredUp
TDUP
$736M
| $1.21M | ﹤0.01% |
94,500
+84,500
| +845% | +$1.54M |
|
2619
American Water Works
AWK
$26.3B
| $1.2M | ﹤0.01% |
6,376
+6,209
| +3,718% | +$1.08M |
|
|
NNDM
2620
CALL
Nano Dimension
NNDM
$309M
| $1.2M | ﹤0.01% |
316,500
+188,900
| +148% | +$959K |
|
2621
AvalonBay Communities
AVB
$27.1B
| $1.2M | ﹤0.01% |
4,757
-6,574
| -58% | -$1.57M |
|
2622
United States 12 Month Oil Fund,
USL
$46.6M
| $1.2M | ﹤0.01% |
43,019
+12,411
| +41% | +$346K |
|
2623
CALL
KB Financial Group
KB
$41.2B
| $1.2M | ﹤0.01% |
26,000
-11,900
| -31% | -$565K |
|
2624
PUT
Lamar Advertising Co
LAMR
$16.2B
| $1.2M | ﹤0.01% |
9,900
+9,500
| +2,375% | +$1.11M |
|
2625
Alto Ingredients
ALTO
$360M
| $1.2M | ﹤0.01% |
249,441
+16,368
| +7% | +$85.9K |
|
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.