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 | |
|---|---|---|---|---|---|---|
251
PUT
Lucid Motors
LCID
$2.47B
| $57.8M | 0.06% |
+152,030
| New | +$57.3M |
|
252
CALL
Rivian
RIVN
$24B
| $57.4M | 0.06% |
+553,700
| New | +$63.8M |
|
253
PUT
Pinterest
PINS
$12.3B
| $56.6M | 0.06% |
1,558,000
+74,600
| +5% | +$3.32M |
|
254
PUT
Eli Lilly
LLY
$1.06T
| $56.4M | 0.06% |
204,200
-15,800
| -7% | -$4.01M |
|
255
PUT
Abbott
ABT
$175B
| $56.1M | 0.06% |
447,800
+198,200
| +79% | +$25.4M |
|
256
CALL
Gilead Sciences
GILD
$161B
| $56M | 0.06% |
770,700
+13,700
| +2% | +$944K |
|
|
X
257
PUT
DELISTED
US Steel
X
| $55.9M | 0.06% |
2,349,500
+30,200
| +1% | +$712K |
|
258
PUT
Royal Caribbean
RCL
$76B
| $55.5M | 0.06% |
721,600
+127,100
| +21% | +$10.3M |
|
259
CALL
Intuitive Surgical
ISRG
$119B
| $55.3M | 0.06% |
153,800
-38,500
| -20% | -$13.2M |
|
260
PUT
Beyond Meat
BYND
$287M
| $54.9M | 0.06% |
842,600
+32,800
| +4% | +$2.79M |
|
|
KFYP
261
PUT
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $54.8M | 0.06% |
1,497,200
+1,193,200
| +393% | +$38M |
|
262
PUT
Enphase Energy
ENPH
$5.05B
| $53.9M | 0.05% |
294,800
+31,300
| +12% | +$6.53M |
|
263
PUT
Marriott International
MAR
$95.6B
| $52.8M | 0.05% |
319,800
+124,400
| +64% | +$19.6M |
|
264
PUT
Datadog
DDOG
$87.1B
| $52.6M | 0.05% |
295,400
-28,800
| -9% | -$4.89M |
|
265
PUT
Texas Instruments
TXN
$255B
| $52.1M | 0.05% |
276,400
-136,200
| -33% | -$26.1M |
|
266
PUT
VanEck Durable High Dividend ETF
DURA
$38.5M
| $52M | 0.05% |
300,000
-23,600
| -7% | -$737K |
|
267
CALL
Biogen
BIIB
$29.7B
| $51.9M | 0.05% |
216,400
+63,800
| +42% | +$16.4M |
|
268
CALL
Novavax
NVAX
$1.28B
| $51.1M | 0.05% |
357,100
+232,200
| +186% | +$39.9M |
|
269
CALL
IBM
IBM
$192B
| $50.8M | 0.05% |
1,203,500
+599,017
| +99% | +$75.1M |
|
270
CALL
ASML
ASML
$690B
| $50.6M | 0.05% |
63,600
+47,900
| +305% | +$38.1M |
|
271
CALL
3M
MMM
$87.2B
| $50.1M | 0.05% |
337,631
+80,371
| +31% | +$12M |
|
272
CALL
Upstart Holdings
UPST
$2.62B
| $49.8M | 0.05% |
329,300
+171,500
| +109% | +$42.8M |
|
273
PUT
Autodesk
ADSK
$43.1B
| $49.7M | 0.05% |
176,900
+94,900
| +116% | +$27.7M |
|
274
Direxion Daily S&P 500 Bull 3x ETF
SPXL
$6.55B
| $49.7M | 0.05% |
346,519
+109,493
| +46% | +$14.3M |
|
275
CALL
Starbucks
SBUX
$117B
| $49.7M | 0.05% |
424,600
-78,300
| -16% | -$8.83M |
|
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.