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 | |
|---|---|---|---|---|---|---|
276
PUT
Upstart Holdings
UPST
$2.74B
| $49.5M | 0.05% |
326,900
+74,500
| +30% | +$18.6M |
|
277
CALL
Etsy
ETSY
$7.64B
| $48.8M | 0.05% |
222,800
+4,700
| +2% | +$1.13M |
|
|
278
PUT
Etsy
ETSY
$7.64B
| $48.8M | 0.05% |
222,700
-52,100
| -19% | -$12.6M |
|
279
CALL
GameStop
GME
$9.69B
| $48.4M | 0.05% |
1,304,000
-2,606,400
| -67% | -$119M |
|
280
PUT
Peloton Interactive
PTON
$2.71B
| $48.2M | 0.05% |
1,347,800
+415,800
| +45% | +$25.4M |
|
281
PUT
Futu Holdings
FUTU
$14.9B
| $47.9M | 0.05% |
1,105,400
+802,600
| +265% | +$45.9M |
|
282
PUT
Deere & Co
DE
$164B
| $47.8M | 0.05% |
139,500
-120,600
| -46% | -$42M |
|
283
PUT
Hilton Worldwide
HLT
$73.8B
| $47.8M | 0.05% |
306,500
+161,400
| +111% | +$23.2M |
|
284
PUT
Charter Communications
CHTR
$15.9B
| $47.3M | 0.05% |
72,500
+31,300
| +76% | +$21.3M |
|
285
PUT
Zillow
Z
$7.18B
| $47.2M | 0.05% |
740,200
+408,100
| +123% | +$29.4M |
|
286
CALL
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$156M
| $46.8M | 0.05% |
157,844
+59,594
| +61% | +$21.2M |
|
287
PUT
ASML
ASML
$692B
| $46.7M | 0.05% |
58,700
+10,900
| +23% | +$8.66M |
|
288
PUT
T-Mobile US
TMUS
$207B
| $46.7M | 0.05% |
403,100
+307,500
| +322% | +$36.2M |
|
289
PUT
NextEra Energy
NEE
$186B
| $46.3M | 0.05% |
495,900
+264,400
| +114% | +$22.9M |
|
290
PUT
Okta
OKTA
$23.8B
| $46M | 0.05% |
205,200
+88,000
| +75% | +$21M |
|
291
PUT
Plug Power
PLUG
$3.11B
| $46M | 0.05% |
1,629,100
+79,500
| +5% | +$2.75M |
|
292
PUT
iShares Core MSCI Emerging Markets ETF
IEMG
$153B
| $45.9M | 0.05% |
703,600
+242,300
| +53% | +$15M |
|
293
CALL
Analog Devices
ADI
$188B
| $45.9M | 0.05% |
261,100
+150,800
| +137% | +$26.7M |
|
294
PUT
Electronic Arts
EA
$52.4B
| $45.7M | 0.05% |
346,300
+156,400
| +82% | +$21M |
|
295
PUT
Occidental Petroleum
OXY
$57.2B
| $45.3M | 0.05% |
1,585,200
+1,056,300
| +200% | +$33.1M |
|
296
TSMC
TSM
$2.18T
| $45.3M | 0.05% |
376,467
+151,651
| +67% | +$17.8M |
|
297
CALL
Comcast
CMCSA
$84B
| $45.2M | 0.05% |
898,900
+117,300
| +15% | +$6.11M |
|
|
X
298
CALL
DELISTED
US Steel
X
| $45M | 0.05% |
1,889,500
+405,900
| +27% | +$9.57M |
|
299
PUT
Estee Lauder
EL
$29.9B
| $44.4M | 0.04% |
119,900
+93,500
| +354% | +$31.7M |
|
|
SCHW
300
PUT
Charles Schwab
SCHW
$175B
| $44.3M | 0.04% |
528,900
-52,300
| -9% | -$4.23M |
|
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.