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 |
Invesco QQQ Trust
QQQ
|
+$86.9M |
| 2 |
Walt Disney
DIS
|
+$25.5M |
| 3 |
Baidu
BIDU
|
+$12.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$12.3M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$66M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$60.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$33.9M |
| 4 |
Apple
AAPL
|
+$21.1M |
| 5 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$18.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.58% |
| 2 | Technology | 0.42% |
| 3 | Healthcare | 0.34% |
| 4 | Consumer Discretionary | 0.29% |
| 5 | Industrials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
SHNY
301
PUT
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $14.4M | 0.04% |
6,866
+634
| +10% | +$1.33M |
|
302
PUT
Analog Devices
ADI
$188B
| $14.3M | 0.04% |
1,361
+854
| +168% | +$85.7K |
|
303
CALL
Lockheed Martin
LMT
$119B
| $14.3M | 0.04% |
477
-301
| -39% | -$88.3K |
|
304
CALL
ConocoPhillips
COP
$145B
| $14.3M | 0.04% |
2,144
+354
| +20% | +$23.8K |
|
305
CALL
Snap
SNAP
$7.52B
| $14M | 0.04% |
12,741
+11,801
| +1,255% | +$100K |
|
306
PUT
American Express
AXP
$238B
| $13.9M | 0.04% |
1,274
-1,105
| -46% | -$116K |
|
307
CALL
Workday
WDAY
$32.7B
| $13.9M | 0.04% |
721
+106
| +17% | +$19.3K |
|
|
AGN
308
CALL
DELISTED
Allergan plc
AGN
| $13.8M | 0.04% |
943
-1,227
| -57% | -$178K |
|
|
309
Alphabet (Google) Class A
GOOGL
$4.17T
| $13.8M | 0.04% |
233,780
+218,100
| +1,391% | +$12.3M |
|
|
ATVI
310
PUT
DELISTED
Activision Blizzard
ATVI
| $13.6M | 0.04% |
2,998
-1,526
| -34% | -$69K |
|
311
PUT
MongoDB
MDB
$24.5B
| $13.6M | 0.04% |
927
+594
| +178% | +$61K |
|
312
CALL
Universal Display
OLED
$3.81B
| $13.6M | 0.04% |
890
-250
| -22% | -$30.9K |
|
313
PUT
NextEra Energy
NEE
$186B
| $13.6M | 0.04% |
2,804
-808
| -22% | -$36.9K |
|
314
CALL
Take-Two Interactive
TTWO
$43.4B
| $13.5M | 0.04% |
1,435
-16
| -1% | -$1.55K |
|
315
PUT
CarMax
KMX
$8.15B
| $13.5M | 0.04% |
1,934
+1,363
| +239% | +$84K |
|
316
PUT
SBA Communications
SBAC
$18.9B
| $13.4M | 0.04% |
673
+587
| +683% | +$106K |
|
317
PUT
Las Vegas Sands
LVS
$30B
| $13.4M | 0.04% |
2,203
+315
| +17% | +$18.6K |
|
318
CALL
Valero Energy
VLO
$92.3B
| $13.4M | 0.04% |
1,582
-1,060
| -40% | -$87.6K |
|
319
CALL
Align Technology
ALGN
$12.4B
| $13.4M | 0.04% |
470
+195
| +71% | +$46.5K |
|
320
CALL
Automatic Data Processing
ADP
$97.2B
| $13.4M | 0.04% |
836
-1,029
| -55% | -$149K |
|
321
PUT
Centene
CNC
$32.5B
| $13.3M | 0.04% |
2,508
+902
| +56% | +$54.8K |
|
322
CALL
Medtronic
MDT
$105B
| $13.2M | 0.04% |
1,445
+173
| +14% | +$15.5K |
|
|
STZ.B
323
CALL
DELISTED
CONSTELLATION BRANDS, INC. CLASS B
STZ.B
| $13.1M | 0.04% |
745
-299
| -29% | -$50.3K |
|
324
CALL
Abbott
ABT
$175B
| $13M | 0.04% |
1,625
-2,080
| -56% | -$155K |
|
325
PUT
Kraft Heinz
KHC
$30.8B
| $12.7M | 0.04% |
3,904
+1,512
| +63% | +$61.6K |
|
Similar funds
Simplex Trading's Q1 2019 Portfolio in Review
As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.
By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
- Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
- Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
- Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
- Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
- Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.
Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.