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 | |
|---|---|---|---|---|---|---|
451
PUT
Novartis
NVS
$297B
| $8.72M | 0.02% |
1,115
+855
| +329% | +$72.4K |
|
452
CALL
Emerson Electric
EMR
$81.2B
| $8.71M | 0.02% |
1,306
+454
| +53% | +$30.4K |
|
453
PUT
Kraft Heinz
KHC
$30.1B
| $8.7M | 0.02% |
2,804
-1,100
| -28% | -$34.7K |
|
454
PUT
Atlassian
TEAM
$20.3B
| $8.7M | 0.02% |
665
+298
| +81% | +$35.9K |
|
|
MDCO
455
PUT
DELISTED
Medicines Co
MDCO
| $8.68M | 0.02% |
2,380
+1,427
| +150% | +$46.6K |
|
456
PUT
Fidelity National Information Services
FIS
$20.7B
| $8.64M | 0.02% |
704
-268
| -28% | -$31.5K |
|
|
PXD
457
PUT
DELISTED
Pioneer Natural Resource Co.
PXD
| $8.62M | 0.02% |
560
-116
| -17% | -$17.8K |
|
458
Analog Devices
ADI
$185B
| $8.59M | 0.02% |
76,148
+46,564
| +157% | +$5.04M |
|
|
AZPN
459
PUT
DELISTED
ASPEN TECHNOLOGY INC
AZPN
| $8.59M | 0.02% |
691
-28
| -4% | -$348K |
|
460
PUT
Lyft
LYFT
$5.32B
| $8.57M | 0.02% |
+1,305
| New | +$78.5K |
|
|
APC
461
CALL
DELISTED
Anadarko Petroleum
APC
| $8.57M | 0.02% |
1,215
-1,365
| -53% | -$91.5K |
|
462
CALL
CME Group
CME
$91.9B
| $8.54M | 0.02% |
440
-185
| -30% | -$34.1K |
|
|
463
CALL
Lyft
LYFT
$5.32B
| $8.53M | 0.02% |
+1,298
| New | +$78K |
|
464
CALL
Chubb
CB
$137B
| $8.53M | 0.02% |
579
+249
| +75% | +$36K |
|
465
PUT
Corpay
CPAY
$23.8B
| $8.48M | 0.02% |
302
-160
| -35% | -$41.9K |
|
466
CALL
Corning
GLW
$134B
| $8.47M | 0.02% |
2,548
+311
| +14% | +$9.98K |
|
467
PUT
Vertex Pharmaceuticals
VRTX
$120B
| $8.45M | 0.02% |
461
-14
| -3% | -$2.45K |
|
|
SPLK
468
PUT
DELISTED
Splunk Inc
SPLK
| $8.45M | 0.02% |
672
-708
| -51% | -$89.9K |
|
|
CTXS
469
CALL
DELISTED
Citrix Systems Inc
CTXS
| $8.45M | 0.02% |
861
+50
| +6% | +$4.91K |
|
|
VMW
470
CALL
DELISTED
VMware, Inc
VMW
| $8.38M | 0.02% |
501
+216
| +76% | +$40.5K |
|
471
CALL
Carnival Corporation Ltd
CCL
$34.6B
| $8.37M | 0.02% |
1,797
-87
| -5% | -$4.55K |
|
472
CALL
Charter Communications
CHTR
$15.6B
| $8.34M | 0.02% |
211
-36
| -15% | -$13.5K |
|
|
473
CALL
Atlassian
TEAM
$20.3B
| $8.31M | 0.02% |
635
+272
| +75% | +$32.8K |
|
474
PUT
Zoom
ZM
$24.7B
| $8.29M | 0.02% |
+934
| New | +$76.8K |
|
475
McDonald's
MCD
$187B
| $8.22M | 0.02% |
+39,584
| New | +$7.84M |
|
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.