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 | |
|---|---|---|---|---|---|---|
601
PUT
DexCom
DXCM
$27.2B
| $15.5M | 0.02% |
115,200
-59,200
| -34% | -$8.51M |
|
602
PUT
Microchip Technology
MCHP
$44B
| $15.4M | 0.02% |
176,500
+52,700
| +43% | +$4.26M |
|
603
PUT
Digital Realty Trust
DLR
$66.6B
| $15.4M | 0.02% |
86,800
+64,800
| +295% | +$10.4M |
|
604
PUT
Elevance Health
ELV
$82.2B
| $15.3M | 0.02% |
33,100
-35,500
| -52% | -$14.9M |
|
605
PUT
Western Digital
WDC
$195B
| $15.3M | 0.02% |
310,640
-287,488
| -48% | -$12.5M |
|
606
CALL
Vanguard Dividend Appreciation ETF
VIG
$110B
| $15.3M | 0.02% |
88,800
+73,300
| +473% | +$12.1M |
|
607
CALL
Chegg
CHGG
$104M
| $15.2M | 0.02% |
496,500
+232,200
| +88% | +$9.42M |
|
608
PUT
HubSpot
HUBS
$9.9B
| $15.2M | 0.02% |
23,000
+14,700
| +177% | +$11.1M |
|
609
CALL
Teva Pharmaceuticals
TEVA
$35.7B
| $15.2M | 0.02% |
1,892,400
+792,400
| +72% | +$7.15M |
|
|
BHVN
610
PUT
DELISTED
Biohaven Pharmaceutical Holding Company Ltd.
BHVN
| $15.1M | 0.02% |
109,600
+107,900
| +6,347% | +$13.7M |
|
|
611
CALL
Microchip Technology
MCHP
$44B
| $15M | 0.02% |
172,400
+98,800
| +134% | +$7.99M |
|
612
PUT
Sherwin-Williams
SHW
$76.8B
| $15M | 0.02% |
42,600
-6,300
| -13% | -$2.04M |
|
613
PUT
Cadence Design Systems
CDNS
$92B
| $15M | 0.02% |
80,500
+20,400
| +34% | +$3.56M |
|
614
CALL
ClearShares Piton Intermediate Fixed Income ETF
PIFI
$97.5M
| $15M | 0.02% |
704,800
+212,800
| +43% | +$21M |
|
615
CALL
Seagate
STX
$209B
| $14.9M | 0.02% |
132,300
-206,300
| -61% | -$20M |
|
616
PUT
Lennar Class A
LEN
$19.4B
| $14.9M | 0.02% |
132,431
-9,090
| -6% | -$929K |
|
617
CALL
RTX Corp
RTX
$281B
| $14.8M | 0.01% |
180,100
-550,434
| -75% | -$48M |
|
618
ASML
ASML
$693B
| $14.7M | 0.01% |
18,481
+11,394
| +161% | +$9.05M |
|
619
Rio Tinto
RIO
$149B
| $14.7M | 0.01% |
219,384
+197,634
| +909% | +$12.8M |
|
620
CALL
ConocoPhillips
COP
$148B
| $14.7M | 0.01% |
203,300
-116,800
| -36% | -$8.51M |
|
621
PUT
Kohl's
KSS
$2.04B
| $14.7M | 0.01% |
296,700
+101,300
| +52% | +$5.18M |
|
622
CALL
Vertex Pharmaceuticals
VRTX
$121B
| $14.5M | 0.01% |
66,100
-18,900
| -22% | -$3.68M |
|
623
PUT
QuantumScape Corp
QS
$3.12B
| $14.5M | 0.01% |
651,400
-147,500
| -18% | -$4.04M |
|
624
PUT
Vanguard FTSE Europe ETF
VGK
$29.8B
| $14.5M | 0.01% |
219,000
-106,200
| -33% | -$7.19M |
|
625
PUT
BHP
BHP
$213B
| $14.4M | 0.01% |
267,807
+191,691
| +252% | +$9.59M |
|
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.