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 | |
|---|---|---|---|---|---|---|
1226
PUT
Invesco Mortgage Capital
IVR
$785M
| $3.65M | ﹤0.01% |
1,079
+167
| +18% | +$5.17K |
|
1227
PUT
American Water Works
AWK
$26.3B
| $3.64M | ﹤0.01% |
237
+109
| +85% | +$16.8K |
|
1228
PUT
AutoNation
AN
$6.99B
| $3.64M | ﹤0.01% |
521
+383
| +278% | +$24.1K |
|
1229
CALL
Lumen
LUMN
$6.64B
| $3.63M | ﹤0.01% |
3,725
+916
| +33% | +$9.04K |
|
|
CMRC
1230
PUT
Commerce.com Inc Series 1
CMRC
$219M
| $3.63M | ﹤0.01% |
566
+169
| +43% | +$13.5K |
|
1231
PUT
Trane Technologies
TT
$107B
| $3.63M | ﹤0.01% |
258
+76
| +42% | +$10.5K |
|
1232
CALL
Groupon
GRPN
$975M
| $3.63M | ﹤0.01% |
955
-473
| -33% | -$13K |
|
1233
Lincoln National
LNC
$7.85B
| $3.62M | ﹤0.01% |
71,993
+44,101
| +158% | +$1.87M |
|
1234
Stanley Black & Decker
SWK
$14.1B
| $3.62M | ﹤0.01% |
20,277
+2,932
| +17% | +$520K |
|
|
PLAN
1235
PUT
DELISTED
Anaplan, Inc.
PLAN
| $3.61M | ﹤0.01% |
503
-94
| -16% | -$6.11K |
|
1236
PUT
Dynatrace
DT
$12.1B
| $3.61M | ﹤0.01% |
835
-1,412
| -63% | -$56.1K |
|
|
WW
1237
PUT
DELISTED
WW International
WW
| $3.61M | ﹤0.01% |
1,481
+126
| +9% | +$3.27K |
|
1238
PUT
Axalta
AXTA
$7.1B
| $3.61M | ﹤0.01% |
1,265
+963
| +319% | +$26.2K |
|
1239
PUT
Jack in the Box
JACK
$279M
| $3.61M | ﹤0.01% |
389
+20
| +5% | +$1.75K |
|
1240
PUT
W.P. Carey
WPC
$17B
| $3.6M | ﹤0.01% |
521
-18
| -3% | -$1.2K |
|
1241
PUT
Seagate
STX
$199B
| $3.59M | ﹤0.01% |
578
-42
| -7% | -$2.36K |
|
1242
Western Digital
WDC
$183B
| $3.58M | ﹤0.01% |
85,532
-84,562
| -50% | -$2.81M |
|
1243
CALL
Agilent Technologies
A
$39.1B
| $3.58M | ﹤0.01% |
302
+27
| +10% | +$2.99K |
|
|
ACIA
1244
PUT
DELISTED
Acacia Communications Inc
ACIA
| $3.58M | ﹤0.01% |
490
+420
| +600% | +$29K |
|
1245
Baidu
BIDU
$36.2B
| $3.57M | ﹤0.01% |
16,508
+82
| +0.5% | +$12.2K |
|
1246
CALL
Ollie's Bargain Outlet
OLLI
$3.98B
| $3.56M | ﹤0.01% |
436
+338
| +345% | +$29.5K |
|
1247
PUT
Arvinas
ARVN
$523M
| $3.56M | ﹤0.01% |
419
+416
| +13,867% | +$14.3K |
|
1248
PUT
C.H. Robinson
CHRW
$22.5B
| $3.56M | ﹤0.01% |
379
-32
| -8% | -$3.05K |
|
1249
PUT
SBA Communications
SBAC
$18.9B
| $3.55M | ﹤0.01% |
126
+121
| +2,420% | +$35.5K |
|
1250
PUT
Cirrus Logic
CRUS
$6.76B
| $3.55M | ﹤0.01% |
432
-29
| -6% | -$2.18K |
|
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.