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 | |
|---|---|---|---|---|---|---|
|
BBBY
2326
Bed Bath & Beyond
BBBY
$473M
| $653K | ﹤0.01% |
63,909
+24,613
| +63% | +$230K |
|
2327
CALL
Flowers Foods
FLO
$1.64B
| $653K | ﹤0.01% |
281
-147
| -34% | -$3.26K |
|
|
CMD
2328
CALL
DELISTED
Cantel Medical Corporation
CMD
| $653K | ﹤0.01% |
81
+78
| +2,600% | +$5.48K |
|
2329
CALL
Amphenol
APH
$188B
| $652K | ﹤0.01% |
272
+248
| +1,033% | +$5.97K |
|
2330
CALL
Revolve Group
RVLV
$1.79B
| $652K | ﹤0.01% |
+189
| New | +$7.15K |
|
|
FOCS
2331
DELISTED
Focus Financial Partners Inc. Class A
FOCS
| $651K | ﹤0.01% |
+23,862
| New | +$778K |
|
2332
Voyager Therapeutics
VYGR
$187M
| $650K | ﹤0.01% |
23,897
+7,881
| +49% | +$180K |
|
2333
CALL
BBVA Argentina
BBAR
$3.85B
| $649K | ﹤0.01% |
574
+558
| +3,488% | +$5.21K |
|
2334
CALL
Coeur Mining
CDE
$15.6B
| $649K | ﹤0.01% |
1,496
+1,070
| +251% | +$3.76K |
|
2335
PUT
Melco Resorts & Entertainment
MLCO
$2.1B
| $647K | ﹤0.01% |
298
-86
| -22% | -$1.95K |
|
2336
CALL
BlackBerry
BB
$5.01B
| $646K | ﹤0.01% |
866
-2,478
| -74% | -$21.5K |
|
2337
CALL
CBRE Group
CBRE
$40.8B
| $646K | ﹤0.01% |
126
+86
| +215% | +$4.27K |
|
|
DO
2338
CALL
DELISTED
Diamond Offshore Drilling
DO
| $646K | ﹤0.01% |
729
+433
| +146% | +$4.15K |
|
2339
CALL
Revvity
RVTY
$12.3B
| $645K | ﹤0.01% |
67
-68
| -50% | -$6.33K |
|
2340
PUT
Waters Corp
WAT
$36.8B
| $645K | ﹤0.01% |
30
-48
| -62% | -$10.5K |
|
|
TVRD
2341
PUT
Tvardi Therapeutics
TVRD
$23.5M
| $645K | ﹤0.01% |
8
+2
| +33% | +$1.41K |
|
|
SCIU
2342
CALL
DELISTED
Global X Scientific Beta US ETF
SCIU
| $645K | ﹤0.01% |
335
+7
| +2% | +$226 |
|
|
HA
2343
CALL
DELISTED
Hawaiian Holdings, Inc.
HA
| $644K | ﹤0.01% |
235
-172
| -42% | -$4.67K |
|
2344
RBC Bearings
RBC
$18.8B
| $642K | ﹤0.01% |
3,851
+3,660
| +1,916% | +$518K |
|
2345
Direxion Daily S&P Biotech Bear 3X ETF
LABD
$65.4M
| $641K | ﹤0.01% |
178
+76
| +75% | +$320K |
|
2346
CALL
Edison International
EIX
$30.7B
| $640K | ﹤0.01% |
95
-74
| -44% | -$4.59K |
|
2347
Tredegar Corp
TG
$268M
| $639K | ﹤0.01% |
38,456
+25,387
| +194% | +$429K |
|
2348
CALL
TIM SA
TIMB
$10.2B
| $637K | ﹤0.01% |
+426
| New | +$6.18K |
|
2349
CALL
Tetra Tech
TTEK
$8.23B
| $636K | ﹤0.01% |
405
+175
| +76% | +$2.36K |
|
2350
CALL
Dave & Buster's
PLAY
$343M
| $635K | ﹤0.01% |
157
+66
| +73% | +$3.36K |
|
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.