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 | |
|---|---|---|---|---|---|---|
301
PUT
Simon Property Group
SPG
$73.2B
| $14.3M | 0.04% |
898
+251
| +39% | +$43.2K |
|
302
PUT
lululemon athletica
LULU
$12.6B
| $14.3M | 0.04% |
796
-1,548
| -66% | -$269K |
|
303
CALL
Arista Networks
ANET
$221B
| $14.2M | 0.04% |
8,752
+4,144
| +90% | +$71.7K |
|
304
PUT
American International
AIG
$41.6B
| $14.2M | 0.04% |
2,665
+1,549
| +139% | +$77.2K |
|
305
PUT
Take-Two Interactive
TTWO
$42.8B
| $14.2M | 0.04% |
1,249
+172
| +16% | +$17.7K |
|
|
CELG
306
CALL
DELISTED
Celgene Corp
CELG
| $14.1M | 0.04% |
1,529
-3,852
| -72% | -$366K |
|
|
ATVI
307
CALL
DELISTED
Activision Blizzard
ATVI
| $14.1M | 0.04% |
2,994
-1,722
| -37% | -$79.1K |
|
308
CALL
Pfizer
PFE
$142B
| $14.1M | 0.04% |
3,426
-2,566
| -43% | -$102K |
|
309
PUT
RH
RH
$3.11B
| $14.1M | 0.04% |
1,216
-183
| -13% | -$18.9K |
|
|
310
iShares 20+ Year Treasury Bond ETF
TLT
$42.1B
| $14M | 0.04% |
+105,724
| New | +$13.4M |
|
311
iShares MSCI Brazil ETF
EWZ
$9.15B
| $14M | 0.04% |
320,145
+34,437
| +12% | +$1.42M |
|
312
PUT
Norfolk Southern
NSC
$78.1B
| $13.9M | 0.04% |
698
+356
| +104% | +$70.6K |
|
313
PUT
S&P Global
SPGI
$125B
| $13.6M | 0.04% |
597
-217
| -27% | -$47.4K |
|
314
PUT
Veeva Systems
VEEV
$29.2B
| $13.6M | 0.04% |
838
+738
| +738% | +$108K |
|
315
PUT
Marathon Petroleum
MPC
$91.7B
| $13.6M | 0.04% |
2,428
+591
| +32% | +$32.3K |
|
|
RTN
316
PUT
DELISTED
Raytheon Company
RTN
| $13.5M | 0.04% |
779
-214
| -22% | -$38.5K |
|
317
CALL
RTX Corp
RTX
$282B
| $13.5M | 0.04% |
1,648
+423
| +35% | +$35.4K |
|
318
PUT
Oracle
ORCL
$345B
| $13.2M | 0.04% |
2,312
-3,446
| -60% | -$186K |
|
319
CALL
Expedia Group
EXPE
$30.6B
| $13.1M | 0.04% |
983
-801
| -45% | -$98.7K |
|
320
CALL
Eaton
ETN
$161B
| $13.1M | 0.04% |
1,570
+717
| +84% | +$58K |
|
321
PUT
T-Mobile US
TMUS
$191B
| $13M | 0.04% |
1,758
+1,138
| +184% | +$84.5K |
|
322
CALL
Colgate-Palmolive
CL
$71.5B
| $13M | 0.04% |
1,817
+1,063
| +141% | +$75.5K |
|
323
PUT
MSCI
MSCI
$40.3B
| $13M | 0.04% |
545
+273
| +100% | +$61.2K |
|
324
CALL
Boston Scientific
BSX
$64.7B
| $13M | 0.04% |
3,023
+1,526
| +102% | +$58.7K |
|
325
PUT
Vanguard S&P 500 ETF
VOO
$966B
| $13M | 0.04% |
818
+326
| +66% | +$86.2K |
|
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.