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 | |
|---|---|---|---|---|---|---|
|
TWO
1376
CALL
Two Harbors Investment
TWO
$1.27B
| $4.07M | ﹤0.01% |
176,475
+73,800
| +72% | +$1.84M |
|
|
IPOD
1377
CALL
DELISTED
Social Capital Hedosophia Holdings Corp. IV
IPOD
| $4.07M | ﹤0.01% |
398,300
-29,700
| -7% | -$304K |
|
1378
CALL
Synchrony
SYF
$23.7B
| $4.06M | ﹤0.01% |
87,600
-7,000
| -7% | -$337K |
|
1379
CALL
Applovin
APP
$132B
| $4.05M | ﹤0.01% |
43,000
+20,400
| +90% | +$1.9M |
|
1380
CALL
Zebra Technologies
ZBRA
$12.4B
| $4.05M | ﹤0.01% |
6,800
-2,600
| -28% | -$1.48M |
|
|
TBCH
1381
CALL
Turtle Beach Corp
TBCH
$239M
| $4.04M | ﹤0.01% |
181,700
+166,600
| +1,103% | +$4.5M |
|
1382
PUT
Marqeta
MQ
$1.8B
| $4.04M | ﹤0.01% |
58,850
+53,875
| +1,083% | +$4.82M |
|
1383
CALL
Stryker
SYK
$127B
| $4.04M | ﹤0.01% |
15,100
-23,000
| -60% | -$6.04M |
|
|
ZNGA
1384
PUT
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
| $4.04M | ﹤0.01% |
918,100
+449,200
| +96% | +$3.1M |
|
1385
CALL
argenx
ARGX
$57.4B
| $4.03M | ﹤0.01% |
+11,500
| New | +$3.5M |
|
1386
CALL
Starwood Property Trust
STWD
$6.12B
| $4.03M | ﹤0.01% |
165,700
+85,100
| +106% | +$2.15M |
|
1387
Centene
CNC
$31.3B
| $4.02M | ﹤0.01% |
48,841
+18,327
| +60% | +$1.34M |
|
1388
PUT
MKS Inc
MKSI
$22.2B
| $4.02M | ﹤0.01% |
23,100
+2,400
| +12% | +$375K |
|
1389
CALL
FS KKR Capital
FSK
$2.98B
| $4.02M | ﹤0.01% |
192,100
+156,834
| +445% | +$3.39M |
|
1390
CALL
Capri Holdings
CPRI
$1.77B
| $4.01M | ﹤0.01% |
61,800
-173,400
| -74% | -$10.3M |
|
1391
PUT
Lumentum
LITE
$59.4B
| $4M | ﹤0.01% |
37,800
-80,800
| -68% | -$7.36M |
|
1392
PUT
Celsius Holdings
CELH
$6.93B
| $4M | ﹤0.01% |
160,800
+33,600
| +26% | +$930K |
|
1393
CALL
Fair Isaac
FICO
$28.7B
| $3.99M | ﹤0.01% |
9,200
+7,100
| +338% | +$2.82M |
|
1394
PUT
Pultegroup
PHM
$24.5B
| $3.99M | ﹤0.01% |
69,800
-119,000
| -63% | -$6.1M |
|
1395
CALL
Ciena
CIEN
$55.3B
| $3.97M | ﹤0.01% |
51,600
-27,300
| -35% | -$1.68M |
|
1396
PUT
Aurinia Pharmaceuticals
AUPH
$1.97B
| $3.97M | ﹤0.01% |
173,600
+63,100
| +57% | +$1.5M |
|
|
FLOW
1397
CALL
DELISTED
SPX FLOW, Inc.
FLOW
| $3.97M | ﹤0.01% |
45,900
+44,900
| +4,490% | +$3.61M |
|
1398
CALL
Carrier Global
CARR
$57.2B
| $3.96M | ﹤0.01% |
73,100
+31,200
| +74% | +$1.68M |
|
1399
Bilibili
BILI
$7.18B
| $3.96M | ﹤0.01% |
+85,249
| New | +$5.7M |
|
1400
CALL
Vanguard ESG US Corporate Bond ETF
VCEB
$1.18B
| $3.95M | ﹤0.01% |
25,300
+19,200
| +315% | +$1.41M |
|
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.