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 | |
|---|---|---|---|---|---|---|
676
CALL
Illumina
ILMN
$29.5B
| $13M | 0.01% |
35,055
+3,495
| +11% | +$1.32M |
|
677
CALL
Toronto Dominion Bank
TD
$197B
| $13M | 0.01% |
168,900
-129,000
| -43% | -$9.4M |
|
678
CALL
DuPont de Nemours
DD
$18.5B
| $12.9M | 0.01% |
127,467
-51,385
| -29% | -$4.89M |
|
679
PUT
KKR & Co
KKR
$85.8B
| $12.9M | 0.01% |
173,400
+118,400
| +215% | +$8.74M |
|
680
CALL
CRISPR Therapeutics
CRSP
$4.7B
| $12.9M | 0.01% |
170,200
+83,400
| +96% | +$7.29M |
|
681
CALL
General Dynamics
GD
$102B
| $12.9M | 0.01% |
61,800
+11,000
| +22% | +$2.22M |
|
682
PUT
Lemonade
LMND
$4.71B
| $12.9M | 0.01% |
305,800
+131,800
| +76% | +$7.41M |
|
683
PUT
BILL Holdings
BILL
$4.12B
| $12.9M | 0.01% |
51,600
+10,500
| +26% | +$2.97M |
|
684
Intuit
INTU
$76.9B
| $12.8M | 0.01% |
19,946
-4,311
| -18% | -$2.66M |
|
685
PUT
KE Holdings
BEKE
$17.8B
| $12.8M | 0.01% |
636,400
+528,700
| +491% | +$10.8M |
|
686
PUT
ON Semiconductor
ON
$34.5B
| $12.8M | 0.01% |
188,500
+69,400
| +58% | +$3.93M |
|
687
CALL
Bausch Health
BHC
$1.67B
| $12.8M | 0.01% |
462,000
+216,400
| +88% | +$5.79M |
|
688
CALL
FIVE9
FIVN
$1.64B
| $12.6M | 0.01% |
91,900
+76,900
| +513% | +$11.4M |
|
|
VMW
689
PUT
DELISTED
VMware, Inc
VMW
| $12.6M | 0.01% |
108,400
-47,800
| -31% | -$6.28M |
|
690
Mercado Libre
MELI
$90.9B
| $12.5M | 0.01% |
9,299
+5,021
| +117% | +$7.05M |
|
691
CALL
Lumen
LUMN
$6.65B
| $12.5M | 0.01% |
996,700
+206,400
| +26% | +$2.63M |
|
692
PUT
Novartis
NVS
$297B
| $12.3M | 0.01% |
141,200
+83,500
| +145% | +$6.93M |
|
693
PUT
T. Rowe Price
TROW
$24.6B
| $12.3M | 0.01% |
62,800
+41,600
| +196% | +$8.45M |
|
|
DISH
694
PUT
DELISTED
DISH Network Corp.
DISH
| $12.3M | 0.01% |
378,900
+226,000
| +148% | +$8.42M |
|
|
FISV
695
CALL
Fiserv Inc
FISV
$26.6B
| $12.2M | 0.01% |
117,900
-24,900
| -17% | -$2.57M |
|
696
CALL
NetEase
NTES
$76.8B
| $12.2M | 0.01% |
120,100
+38,600
| +47% | +$3.92M |
|
697
ServiceNow
NOW
$96.3B
| $12.2M | 0.01% |
94,000
+93,325
| +13,826% | +$12.3M |
|
698
CALL
Ally Financial
ALLY
$13.3B
| $12.2M | 0.01% |
255,500
+95,600
| +60% | +$4.73M |
|
699
PUT
Bio-Rad Laboratories Class A
BIO
$8.39B
| $12.2M | 0.01% |
16,100
+14,600
| +973% | +$10.9M |
|
700
PUT
CME Group
CME
$91.5B
| $12.1M | 0.01% |
53,100
+2,900
| +6% | +$638K |
|
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.