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 |
NVIDIA
NVDA
|
+$29.6M |
| 2 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$22.6M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$17.9M |
| 4 |
Netflix
NFLX
|
+$17.1M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$13.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 2 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$40.6M |
| 3 |
Walt Disney
DIS
|
+$25.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.5M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.5% |
| 2 | Communication Services | 0.5% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.3% |
| 5 | Consumer Discretionary | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
PXD
376
CALL
DELISTED
Pioneer Natural Resource Co.
PXD
| $10.9M | 0.03% |
710
+385
| +118% | +$59K |
|
|
WBA
377
PUT
DELISTED
Walgreens Boots Alliance
WBA
| $10.9M | 0.03% |
1,998
-335
| -14% | -$17.8K |
|
378
PUT
EOG Resources
EOG
$77.5B
| $10.9M | 0.03% |
1,169
+492
| +73% | +$45.8K |
|
379
CALL
Valero Energy
VLO
$90.6B
| $10.8M | 0.03% |
1,266
-316
| -20% | -$26.1K |
|
380
PUT
Halliburton
HAL
$27.3B
| $10.8M | 0.03% |
4,761
+2,349
| +97% | +$61K |
|
381
PUT
Sea Limited
SE
$60.9B
| $10.8M | 0.03% |
3,240
+187
| +6% | +$5.07K |
|
|
FISV
382
PUT
Fiserv Inc
FISV
$26.6B
| $10.8M | 0.03% |
1,180
+343
| +41% | +$30.1K |
|
383
PUT
Petrobras
PBR
$122B
| $10.7M | 0.03% |
6,886
+2,395
| +53% | +$36.5K |
|
384
PUT
General Motors
GM
$73B
| $10.7M | 0.03% |
2,779
-1,561
| -36% | -$58.5K |
|
385
CALL
ConocoPhillips
COP
$146B
| $10.6M | 0.03% |
1,741
-403
| -19% | -$25.1K |
|
386
CALL
Thermo Fisher Scientific
TMO
$213B
| $10.6M | 0.03% |
361
+46
| +15% | +$12.7K |
|
387
PUT
O'Reilly Automotive
ORLY
$71.4B
| $10.6M | 0.03% |
4,290
+1,650
| +63% | +$41.8K |
|
388
CALL
SLB Ltd
SLB
$70.6B
| $10.5M | 0.03% |
2,652
-804
| -23% | -$32.4K |
|
389
CALL
PG&E
PCG
$38.6B
| $10.5M | 0.03% |
4,590
+2,212
| +93% | +$44.4K |
|
390
PUT
Comcast
CMCSA
$78.3B
| $10.5M | 0.03% |
2,485
-3,227
| -56% | -$136K |
|
|
RHT
391
DELISTED
Red Hat Inc
RHT
| $10.5M | 0.03% |
55,893
-8,632
| -13% | -$1.59M |
|
392
PUT
Ventas
VTR
$47.6B
| $10.5M | 0.03% |
1,535
+925
| +152% | +$59K |
|
393
CALL
Sarepta Therapeutics
SRPT
$1.68B
| $10.5M | 0.03% |
689
+131
| +23% | +$15.9K |
|
394
PUT
HCA Healthcare
HCA
$83.5B
| $10.4M | 0.03% |
771
+564
| +272% | +$71.3K |
|
395
Spotify
SPOT
$96.4B
| $10.4M | 0.03% |
71,264
+51,519
| +261% | +$7.09M |
|
|
SPLK
396
CALL
DELISTED
Splunk Inc
SPLK
| $10.4M | 0.03% |
828
+338
| +69% | +$42.9K |
|
397
CALL
Cracker Barrel
CBRL
$1.16B
| $10.3M | 0.03% |
606
+330
| +120% | +$54.1K |
|
398
PUT
Tyson Foods
TSN
$20B
| $10.3M | 0.03% |
1,278
+1,084
| +559% | +$83.5K |
|
399
CALL
Automatic Data Processing
ADP
$97.1B
| $10.3M | 0.03% |
622
-214
| -26% | -$34.8K |
|
400
PUT
Cheniere Energy
LNG
$57B
| $10.3M | 0.03% |
1,499
+791
| +112% | +$52.4K |
|
Similar funds
Simplex Trading's Q2 2019 Portfolio in Review
As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,301 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.
By sector, the portfolio is most concentrated in Technology at 0.5% of assets, up from 0.42% a quarter earlier, followed by Communication Services and Healthcare.
- Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
- Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
- Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
- Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
- Simplex Trading opened 1,261 new positions and closed 1,301 in Q2 2019.
- Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.
Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.