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 | Miscellaneous | 97.48% |
| 2 | Technology | 0.51% |
| 3 | Communication Services | 0.5% |
| 4 | Healthcare | 0.37% |
| 5 | Industrials | 0.31% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
276
CALL
MongoDB
MDB
$29.7B
| $15.5M | 0.04% |
1,021
+530
| +108% | +$76.9K |
|
277
CALL
Target
TGT
$74.7B
| $15.3M | 0.04% |
1,761
-1,835
| -51% | -$148K |
|
278
CALL
Dollar Tree
DLTR
$24.7B
| $15.2M | 0.04% |
1,418
+1,048
| +283% | +$110K |
|
279
PUT
Newmont
NEM
$135B
| $15.1M | 0.04% |
3,916
-2,492
| -39% | -$84.2K |
|
280
CALL
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$111M
| $15M | 0.04% |
5,332
+1,698
| +47% | +$38.2K |
|
|
CELG
281
PUT
DELISTED
Celgene Corp
CELG
| $14.9M | 0.04% |
1,612
-5,459
| -77% | -$518K |
|
282
CALL
Linde
LIN
$220B
| $14.9M | 0.04% |
741
+322
| +77% | +$60.2K |
|
283
PUT
Lowe's Companies
LOW
$115B
| $14.8M | 0.04% |
1,468
-698
| -32% | -$73.6K |
|
284
PUT
Mondelez International
MDLZ
$78.2B
| $14.8M | 0.04% |
2,742
-148
| -5% | -$7.68K |
|
285
CALL
American Express
AXP
$220B
| $14.7M | 0.04% |
1,193
-774
| -39% | -$90.9K |
|
286
CALL
Blackstone
BX
$102B
| $14.7M | 0.04% |
3,307
+1,279
| +63% | +$51K |
|
287
CALL
American International
AIG
$39.8B
| $14.7M | 0.04% |
2,754
+1,281
| +87% | +$63.8K |
|
288
PUT
Analog Devices
ADI
$176B
| $14.6M | 0.04% |
1,294
-67
| -5% | -$7.26K |
|
|
HES
289
PUT
DELISTED
Hess
HES
| $14.6M | 0.04% |
2,297
+1,044
| +83% | +$64.6K |
|
290
CALL
General Motors
GM
$77B
| $14.5M | 0.04% |
3,760
-599
| -14% | -$22.5K |
|
291
PUT
Sarepta Therapeutics
SRPT
$2.38B
| $14.5M | 0.04% |
952
+125
| +15% | +$15.2K |
|
292
CALL
Vanguard S&P 500 ETF
VOO
$1.05T
| $14.5M | 0.04% |
1,398
-20
| -1% | -$5.29K |
|
|
293
PUT
Dollar Tree
DLTR
$24.7B
| $14.5M | 0.04% |
1,346
+211
| +19% | +$22.2K |
|
294
PUT
Coca-Cola
KO
$379B
| $14.4M | 0.04% |
2,837
-5,677
| -67% | -$278K |
|
295
CALL
Johnson Controls International
JCI
$87.8B
| $14.4M | 0.04% |
3,494
+1,783
| +104% | +$68.6K |
|
296
PUT
Lockheed Martin
LMT
$121B
| $14.4M | 0.04% |
396
+18
| +5% | +$6.02K |
|
297
Salesforce
CRM
$213B
| $14.4M | 0.04% |
94,873
+28,897
| +44% | +$4.53M |
|
298
CALL
Veeva Systems
VEEV
$44.5B
| $14.4M | 0.04% |
887
+497
| +127% | +$72.4K |
|
299
CALL
Autodesk
ADSK
$45.5B
| $14.4M | 0.04% |
882
-333
| -27% | -$56K |
|
300
CALL
Snap
SNAP
$9.25B
| $14.4M | 0.04% |
10,042
-2,699
| -21% | -$33K |
|
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 1,300 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 Miscellaneous at 97% of assets, up from 97% a quarter earlier, followed by Technology and Communication Services.
- 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 1,300 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.