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 | |
|---|---|---|---|---|---|---|
201
PUT
iShares MSCI Australia ETF
EWA
$1.35B
| $74.7M | 0.08% |
2,694,200
-1,051,500
| -28% | -$26.8M |
|
202
CALL
JD.com
JD
$40.8B
| $74.4M | 0.08% |
1,061,500
-1,006,400
| -49% | -$79.6M |
|
203
CALL
FedEx
FDX
$76.1B
| $73.9M | 0.07% |
285,800
-302,500
| -51% | -$72.6M |
|
204
CALL
Bristol-Myers Squibb
BMY
$124B
| $73.4M | 0.07% |
1,177,200
+478,500
| +68% | +$28.1M |
|
205
PUT
Gilead Sciences
GILD
$164B
| $73.1M | 0.07% |
1,006,700
+327,100
| +48% | +$22.5M |
|
206
PUT
IBM
IBM
$195B
| $72.7M | 0.07% |
1,122,600
+337,891
| +43% | +$42.4M |
|
207
CALL
Expedia Group
EXPE
$31.7B
| $72.5M | 0.07% |
401,400
+65,600
| +20% | +$11.2M |
|
|
208
CALL
Verizon
VZ
$185B
| $72.3M | 0.07% |
1,392,300
-215,000
| -13% | -$11.2M |
|
|
ATVI
209
PUT
DELISTED
Activision Blizzard
ATVI
| $72.2M | 0.07% |
1,084,700
+348,200
| +47% | +$23.8M |
|
|
DOCU
210
PUT
DocuSign
DOCU
$9.11B
| $72.1M | 0.07% |
473,200
+138,800
| +42% | +$31.6M |
|
|
211
PUT
JD.com
JD
$40.8B
| $70.9M | 0.07% |
1,011,500
-441,500
| -30% | -$34.9M |
|
212
CALL
McDonald's
MCD
$188B
| $70.7M | 0.07% |
263,800
+61,900
| +31% | +$15.6M |
|
213
CALL
Lowe's Companies
LOW
$114B
| $70.6M | 0.07% |
273,200
+60,600
| +29% | +$14.4M |
|
214
CALL
Sea Limited
SE
$64.9B
| $70.2M | 0.07% |
313,600
-700
| -0.2% | -$209K |
|
215
PUT
Blackrock
BLK
$163B
| $69.9M | 0.07% |
76,400
+16,300
| +27% | +$14.9M |
|
216
PUT
United Airlines
UAL
$38.1B
| $69.7M | 0.07% |
1,591,200
+228,500
| +17% | +$10.6M |
|
217
PUT
Affirm
AFRM
$24.9B
| $68.9M | 0.07% |
685,400
+623,800
| +1,013% | +$82.4M |
|
218
PUT
Zscaler
ZS
$23.2B
| $68.9M | 0.07% |
214,400
+19,100
| +10% | +$6.01M |
|
219
PUT
Roblox
RBLX
$35.9B
| $68.3M | 0.07% |
661,800
+3,700
| +0.6% | +$359K |
|
220
CALL
American Airlines Group
AAL
$10.1B
| $67.7M | 0.07% |
3,767,000
+444,100
| +13% | +$8.52M |
|
221
CALL
UnitedHealth
UNH
$393B
| $67.1M | 0.07% |
133,600
+5,300
| +4% | +$2.4M |
|
222
PUT
Comcast
CMCSA
$84.9B
| $67M | 0.07% |
1,330,500
+492,000
| +59% | +$25.6M |
|
223
CALL
VanEck Durable High Dividend ETF
DURA
$38.4M
| $66.5M | 0.07% |
389,700
+500
| +0.1% | +$15.6K |
|
|
TWTR
224
PUT
DELISTED
Twitter, Inc.
TWTR
| $66.3M | 0.07% |
1,533,700
-356,700
| -19% | -$18.5M |
|
225
PUT
Trade Desk
TTD
$8.29B
| $66.1M | 0.07% |
721,500
+15,200
| +2% | +$1.33M |
|
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.