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 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5251
CALL
Cohu
COHU
$2B
| $47K | ﹤0.01% |
21
+17
| +425% | +$305 |
|
5252
Invesco DB Commodity Index Tracking Fund
DBC
$1.65B
| $47K | ﹤0.01% |
2,982
-1,700
| -36% | -$26.4K |
|
|
ELME
5253
Elme Communities
ELME
$142M
| $47K | ﹤0.01% |
1,633
+1,056
| +183% | +$31.4K |
|
|
LAND
5254
CALL
Gladstone Land Corp
LAND
$366M
| $47K | ﹤0.01% |
37
-53
| -59% | -$651 |
|
5255
PUT
Lazard
LAZ
$4.21B
| $47K | ﹤0.01% |
12
-5
| -29% | -$189 |
|
5256
LivaNova
LIVN
$4.51B
| $47K | ﹤0.01% |
625
-175
| -22% | -$13.3K |
|
|
OTRK
5257
DELISTED
Ontrak
OTRK
| $47K | ﹤0.01% |
+32
| New | +$44.2K |
|
5258
PUT
PACCAR
PCAR
$72.7B
| $47K | ﹤0.01% |
9
-45
| -83% | -$2.31K |
|
5259
ProShares Short Russell2000
RWM
$131M
| $47K | ﹤0.01% |
+1,285
| New | +$50K |
|
5260
PUT
Champion Homes
SKY
$4.58B
| $47K | ﹤0.01% |
15
-14
| -48% | -$436 |
|
5261
Savara
SVRA
$1.09B
| $47K | ﹤0.01% |
10,604
-10,280
| -49% | -$12.4K |
|
|
FOCS
5262
PUT
DELISTED
Focus Financial Partners Inc. Class A
FOCS
| $47K | ﹤0.01% |
16
-478
| -97% | -$12.2K |
|
|
VSLR
5263
PUT
DELISTED
VIVINT SOLAR, INC.
VSLR
| $47K | ﹤0.01% |
66
-8
| -11% | -$56 |
|
|
HCR
5264
CALL
DELISTED
Hi-Crush Inc. Common Stock
HCR
| $47K | ﹤0.01% |
542
-439
| -45% | -$463 |
|
|
JCP
5265
DELISTED
J.C. Penney Company, Inc.
JCP
| $47K | ﹤0.01% |
42,246
+8,313
| +24% | +$8.83K |
|
5266
CALL
Abeona Therapeutics
ABEO
$343M
| $46K | ﹤0.01% |
6
-4
| -40% | -$282 |
|
5267
PUT
Amkor Technology
AMKR
$11.3B
| $46K | ﹤0.01% |
36
+22
| +157% | +$262 |
|
5268
PUT
Ares Management
ARES
$28.8B
| $46K | ﹤0.01% |
13
+12
| +1,200% | +$373 |
|
5269
CALL
Gerdau
GGB
$9.72B
| $46K | ﹤0.01% |
120
-108
| -47% | -$321 |
|
5270
Honda
HMC
$39.3B
| $46K | ﹤0.01% |
1,630
-2,928
| -64% | -$81.5K |
|
5271
Koppers
KOP
$965M
| $46K | ﹤0.01% |
+1,222
| New | +$42.9K |
|
5272
CALL
Kontoor Brands
KTB
$4.87B
| $46K | ﹤0.01% |
11
-15
| -58% | -$566 |
|
5273
CALL
Nelnet
NNI
$4.92B
| $46K | ﹤0.01% |
8
+1
| +14% | +$61 |
|
5274
PUT
Turkcell
TKC
$4.78B
| $46K | ﹤0.01% |
80
-55
| -41% | -$314 |
|
5275
PUT
Viavi Solutions
VIAV
$8.66B
| $46K | ﹤0.01% |
31
-15
| -33% | -$225 |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.