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 |
iShares Russell 2000 ETF
IWM
|
+$29.8M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$17.1M |
| 3 |
Walt Disney
DIS
|
+$14.8M |
| 4 |
Gilead Sciences
GILD
|
+$11.8M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$11.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$92.9M |
| 2 |
Apple
AAPL
|
+$22.5M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20.5M |
| 4 |
IBM
IBM
|
+$12.7M |
| 5 |
Baidu
BIDU
|
+$10M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Healthcare | 6.46% |
| 2 | Communication Services | 4.66% |
| 3 | Consumer Discretionary | 4.6% |
| 4 | Technology | 4.57% |
| 5 | Financials | 4.49% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
351
PUT
Herbalife
HLF
$1.26B
| $652K | 0.05% |
4,352
+1,278
| +42% | +$35K |
|
352
Cheniere Energy
LNG
$56B
| $650K | 0.05% |
+13,473
| New | +$831K |
|
353
Jazz Pharmaceuticals
JAZZ
$15.7B
| $649K | 0.05% |
4,894
+4,594
| +1,531% | +$791K |
|
|
P
354
DELISTED
Pandora Media Inc
P
| $648K | 0.05% |
30,406
-730
| -2% | -$12.8K |
|
355
Franklin Resources
BEN
$16.8B
| $646K | 0.05% |
17,346
+15,141
| +687% | +$656K |
|
356
Core Laboratories
CLB
$551M
| $646K | 0.05% |
6,476
+4,300
| +198% | +$468K |
|
357
iShares TIPS Bond ETF
TIP
$14.5B
| $643K | 0.05% |
5,817
-2,427
| -29% | -$271K |
|
|
MBLY
358
CALL
DELISTED
Mobileye N.V.
MBLY
| $640K | 0.05% |
1,510
+95
| +7% | +$5.22K |
|
359
National Fuel Gas
NFG
$7.87B
| $639K | 0.05% |
12,790
+12,609
| +6,966% | +$681K |
|
360
CALL
United Parcel Service
UPS
$98.5B
| $639K | 0.05% |
2,538
+1,894
| +294% | +$187K |
|
|
VIMC
361
DELISTED
VIMICRO INTERNATIONAL CORP ADR (KY)
VIMC
| $633K | 0.05% |
50,868
+43,728
| +612% | +$485K |
|
362
WisdomTree Europe Hedged Equity Fund
HEDJ
$1.84B
| $632K | 0.05% |
23,154
-4,986
| -18% | -$150K |
|
|
PXD
363
PUT
DELISTED
Pioneer Natural Resource Co.
PXD
| $630K | 0.05% |
457
-326
| -42% | -$40.6K |
|
364
PUT
American International
AIG
$41.5B
| $628K | 0.05% |
1,615
+1,099
| +213% | +$67.2K |
|
365
CALL
Amgen
AMGN
$198B
| $628K | 0.05% |
2,331
+566
| +32% | +$89.2K |
|
366
PUT
NXP Semiconductors
NXPI
$70.4B
| $628K | 0.05% |
1,032
+795
| +335% | +$71.7K |
|
367
PUT
United States Oil Fund
USO
$2.36B
| $626K | 0.05% |
331
+208
| +169% | +$25.5K |
|
|
RDS.B
368
DELISTED
Royal Dutch Shell PLC ADS Class B
RDS.B
| $626K | 0.05% |
13,188
-15,191
| -54% | -$819K |
|
369
iShares Core S&P Small-Cap ETF
IJR
$110B
| $624K | 0.05% |
+11,728
| New | +$665K |
|
|
RAI
370
DELISTED
Reynolds American Inc
RAI
| $624K | 0.05% |
14,096
+10,334
| +275% | +$429K |
|
371
Bank of America
BAC
$432B
| $623K | 0.05% |
40,020
+5,507
| +16% | +$92.7K |
|
372
PUT
HP
HPQ
$23B
| $622K | 0.05% |
4,827
+3,966
| +461% | +$51.5K |
|
373
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$5.56B
| $621K | 0.05% |
48,290
+23,520
| +95% | +$78.6K |
|
|
SPLK
374
PUT
DELISTED
Splunk Inc
SPLK
| $620K | 0.05% |
401
+3
| +0.8% | +$196 |
|
|
TTPH
375
DELISTED
Tetraphase Pharmaceuticals, Inc.
TTPH
| $620K | 0.05% |
4,162
+3,724
| +850% | +$2.73M |
|
Similar funds
Simplex Trading's Q3 2015 Portfolio in Review
As of Q3 2015, Simplex Trading held 7,014 positions worth $1.36B, up 14% from $1.19B the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q3 2015 filing shows 1,810 new, 2,203 increased, 1,391 reduced and 1,420 closed positions. Its largest new stake was iShares Russell 2000 ETF: 251,486 shares worth $27.5M. The largest sale was Alphabet (Google) Class C, an estimated $92.9M.
By sector, the portfolio is most concentrated in Healthcare at 6.5% of assets, down from 7.8% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q3 2015 buy was iShares Russell 2000 ETF: 251,486 shares worth $27.5M.
- Simplex Trading added most to iShares MSCI Emerging Markets ETF in Q3 2015, an estimated $11.2M increase.
- Simplex Trading's biggest Q3 2015 reduction was Alphabet (Google) Class C, cutting an estimated $92.9M.
- Simplex Trading fully exited IBM in Q3 2015, selling an estimated $12.7M.
- Simplex Trading's ten largest holdings make up 15% of its $1.36B portfolio in Q3 2015.
- Simplex Trading opened 1,810 new positions and closed 1,420 in Q3 2015.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $1.36B.
Based on Simplex Trading's 13F filing for Q3 2015, filed 8 Oct 2015.