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 | |
|---|---|---|---|---|---|---|
|
ZNGA
2426
PUT
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
| $684K | ﹤0.01% |
1,119
-387
| -26% | -$2.39K |
|
2427
Editas Medicine
EDIT
$399M
| $683K | ﹤0.01% |
23,095
+19,130
| +482% | +$478K |
|
2428
CALL
Pinnacle West Capital
PNW
$12.9B
| $683K | ﹤0.01% |
76
+9
| +13% | +$812 |
|
2429
PUT
Invesco Aerospace & Defense ETF
PPA
$8.27B
| $683K | ﹤0.01% |
140
+73
| +109% | +$4.96K |
|
|
COHR
2430
PUT
DELISTED
Coherent Inc
COHR
| $682K | ﹤0.01% |
41
-97
| -70% | -$15K |
|
2431
CALL
Applied Optoelectronics
AAOI
$8.04B
| $681K | ﹤0.01% |
574
-79
| -12% | -$843 |
|
2432
Hartford Financial Services
HIG
$38.5B
| $681K | ﹤0.01% |
11,216
+3,431
| +44% | +$206K |
|
|
RDUS
2433
CALL
DELISTED
Radius Health, Inc.
RDUS
| $681K | ﹤0.01% |
338
-151
| -31% | -$3.67K |
|
2434
CALL
Ameris Bancorp
ABCB
$5.89B
| $680K | ﹤0.01% |
160
+117
| +272% | +$5K |
|
2435
PUT
EQT Corp
EQT
$33.2B
| $680K | ﹤0.01% |
624
-552
| -47% | -$5.4K |
|
2436
PUT
Omnicom Group
OMC
$22.7B
| $680K | ﹤0.01% |
84
-224
| -73% | -$17.6K |
|
2437
PUT
uniQure
QURE
$2.68B
| $680K | ﹤0.01% |
95
+22
| +30% | +$1.21K |
|
|
OPTU
2438
Optimum Communications Inc
OPTU
$316M
| $679K | ﹤0.01% |
24,870
+24,319
| +4,414% | +$672K |
|
2439
Amphenol
APH
$188B
| $678K | ﹤0.01% |
25,084
+4,544
| +22% | +$116K |
|
|
FIT
2440
PUT
DELISTED
Fitbit, Inc. Class A common stock
FIT
| $678K | ﹤0.01% |
1,033
+861
| +501% | +$5.05K |
|
|
TLRD
2441
PUT
DELISTED
Tailored Brands, Inc.
TLRD
| $678K | ﹤0.01% |
1,638
+254
| +18% | +$1.2K |
|
2442
CALL
Box
BOX
$4.02B
| $677K | ﹤0.01% |
404
+144
| +55% | +$2.42K |
|
2443
CALL
Euronet Worldwide
EEFT
$3.02B
| $677K | ﹤0.01% |
43
-184
| -81% | -$27.8K |
|
2444
Exelixis
EXEL
$13.9B
| $677K | ﹤0.01% |
38,454
+31,492
| +452% | +$534K |
|
2445
PUT
Plug Power
PLUG
$2.92B
| $677K | ﹤0.01% |
2,145
+1,634
| +320% | +$4.97K |
|
|
CY
2446
PUT
DELISTED
Cypress Semiconductor
CY
| $676K | ﹤0.01% |
290
+4
| +1% | +$94 |
|
2447
CALL
Wendy's
WEN
$1.33B
| $675K | ﹤0.01% |
304
+104
| +52% | +$2.21K |
|
2448
CALL
HealthEquity
HQY
$7.91B
| $674K | ﹤0.01% |
91
-86
| -49% | -$5.37K |
|
|
ONC
2449
BeOne Medicines Ltd
ONC
$33.8B
| $674K | ﹤0.01% |
4,070
+2,937
| +259% | +$488K |
|
2450
Direxion Daily Financial Bull 3x ETF
FAS
$2.4B
| $673K | ﹤0.01% |
+7,112
| New | +$601K |
|
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.