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 |
Alibaba
BABA
|
+$39.9M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$39M |
| 3 |
Mastercard
MA
|
+$31.3M |
| 4 |
Apple
AAPL
|
+$25.3M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$25.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
JPMorgan Chase
JPM
|
+$52.8M |
| 2 |
TSMC
TSM
|
+$43M |
| 3 |
Amazon
AMZN
|
+$24.7M |
| 4 |
iShares Silver Trust
SLV
|
+$24.2M |
| 5 |
Netflix
NFLX
|
+$21.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.65% |
| 2 | Technology | 0.37% |
| 3 | Healthcare | 0.33% |
| 4 | Industrials | 0.21% |
| 5 | Communication Services | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
MRSH
1401
CALL
Marsh
MRSH
$86.3B
| $2.95M | ﹤0.01% |
252
-276
| -52% | -$31.4K |
|
1402
Comcast
CMCSA
$79.7B
| $2.95M | ﹤0.01% |
+56,247
| New | +$2.7M |
|
|
FITB
1403
PUT
Fifth Third Bancorp
FITB
$52B
| $2.94M | ﹤0.01% |
1,066
-377
| -26% | -$9.52K |
|
|
RUTH
1404
PUT
DELISTED
Ruth's Hospitality Group, Inc.
RUTH
| $2.94M | ﹤0.01% |
1,656
-518
| -24% | -$7.28K |
|
|
KNDI
1405
CALL
Kandi Technologies Group
KNDI
$65.3M
| $2.93M | ﹤0.01% |
4,251
+3,550
| +506% | +$29.2K |
|
|
NNDM
1406
Nano Dimension
NNDM
$309M
| $2.93M | ﹤0.01% |
+322,166
| New | +$1.63M |
|
1407
PUT
Aflac
AFL
$63.9B
| $2.92M | ﹤0.01% |
657
-245
| -27% | -$10K |
|
1408
PUT
Churchill Downs
CHDN
$6.03B
| $2.92M | ﹤0.01% |
300
| – | – |
|
1409
PUT
Toyota
TM
$210B
| $2.92M | ﹤0.01% |
189
-64
| -25% | -$8.95K |
|
1410
Etsy
ETSY
$7.65B
| $2.92M | ﹤0.01% |
16,405
-66,050
| -80% | -$9.93M |
|
|
WLL
1411
PUT
DELISTED
Whiting Petroleum Corporation
WLL
| $2.92M | ﹤0.01% |
2,915
+952
| +48% | +$19.1K |
|
1412
CALL
TG Therapeutics
TGTX
$8.58B
| $2.91M | ﹤0.01% |
560
+125
| +29% | +$4.22K |
|
1413
iShares Select Dividend ETF
DVY
$24B
| $2.91M | ﹤0.01% |
30,279
-11,192
| -27% | -$1.02M |
|
1414
CALL
Alnylam Pharmaceuticals
ALNY
$36.3B
| $2.91M | ﹤0.01% |
224
-116
| -34% | -$15.5K |
|
1415
CALL
American Well
AMWL
$181M
| $2.91M | ﹤0.01% |
+57
| New | +$33K |
|
1416
CALL
Dynatrace
DT
$12.1B
| $2.91M | ﹤0.01% |
672
+317
| +89% | +$12.6K |
|
1417
CALL
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.2M
| $2.89M | ﹤0.01% |
374
+295
| +373% | +$22.3K |
|
1418
CALL
Teucrium Soybean Fund
SOYB
$57.2M
| $2.89M | ﹤0.01% |
1,804
+315
| +21% | +$5.43K |
|
|
DM
1419
PUT
DELISTED
Desktop Metal, Inc.
DM
| $2.89M | ﹤0.01% |
168
+72
| +75% | +$9.53K |
|
|
PVG
1420
CALL
DELISTED
PRETIUM RESOURCES INC.
PVG
| $2.89M | ﹤0.01% |
2,514
+149
| +6% | +$1.79K |
|
1421
CALL
Cardinal Health
CAH
$53.4B
| $2.88M | ﹤0.01% |
538
-710
| -57% | -$36.8K |
|
|
GRUB
1422
PUT
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $2.88M | ﹤0.01% |
194
-239
| -55% | -$35.3K |
|
1423
PUT
MP Materials
MP
$7.35B
| $2.88M | ﹤0.01% |
895
-319
| -26% | -$6.17K |
|
1424
PUT
CleanSpark
CLSK
$3.73B
| $2.88M | ﹤0.01% |
991
+631
| +175% | +$8.03K |
|
1425
CALL
MGIC Investment
MTG
$6.27B
| $2.88M | ﹤0.01% |
2,294
+1,411
| +160% | +$16K |
|
Similar funds
Simplex Trading's Q4 2020 Portfolio in Review
As of Q4 2020, Simplex Trading held 9,568 positions worth $77.2B, up 5% from $73.5B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading's Q4 2020 filing shows 1,711 new, 3,402 increased, 3,106 reduced and 1,157 closed positions. Its largest new stake was Alibaba: 143,630 shares worth $33.4M. The largest sale was JPMorgan Chase, an estimated $52.8M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.65% of assets, up from 0.53% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q4 2020 buy was Alibaba: 143,630 shares worth $33.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q4 2020, an estimated $39M increase.
- Simplex Trading's biggest Q4 2020 reduction was JPMorgan Chase, cutting an estimated $52.8M.
- Simplex Trading fully exited Target in Q4 2020, selling an estimated $14.3M.
- Simplex Trading's ten largest holdings make up 42% of its $77.2B portfolio in Q4 2020.
- Simplex Trading opened 1,711 new positions and closed 1,157 in Q4 2020.
- Simplex Trading's portfolio value rose 5% quarter-over-quarter to $77.2B.
Based on Simplex Trading's 13F filing for Q4 2020, filed 2 Feb 2021.