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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
Apple
AAPL
|
+$29.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$15.7M |
| 4 |
IBM
IBM
|
+$13.8M |
| 5 |
Baidu
BIDU
|
+$10.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$10.1M |
| 2 |
McDonald's
MCD
|
+$8.46M |
| 3 |
Ralph Lauren
RL
|
+$5.36M |
| 4 |
Intel
INTC
|
+$5.04M |
| 5 |
WBA
Walgreens Boots Alliance
WBA
|
+$4.76M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 14.27% |
| 2 | Technology | 10.3% |
| 3 | Healthcare | 7.76% |
| 4 | Consumer Discretionary | 6.32% |
| 5 | Financials | 5.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
DD
426
PUT
DELISTED
Du Pont De Nemours E I
DD
| $453K | 0.04% |
999
-53
| -5% | -$3.57K |
|
427
PUT
APA Corp
APA
$12.8B
| $452K | 0.04% |
574
-259
| -31% | -$16.3K |
|
428
Honeywell
HON
$73.8B
| $452K | 0.04% |
4,941
+862
| +21% | +$80.4K |
|
|
BPL
429
DELISTED
Buckeye Partners, L.P.
BPL
| $451K | 0.04% |
6,103
+1,391
| +30% | +$109K |
|
430
CALL
Sarepta Therapeutics
SRPT
$1.67B
| $449K | 0.04% |
517
+314
| +155% | +$6.42K |
|
|
RHT
431
DELISTED
Red Hat Inc
RHT
| $446K | 0.04% |
+5,875
| New | +$452K |
|
432
iShares US Real Estate ETF
IYR
$4.5B
| $441K | 0.04% |
6,188
-23,334
| -79% | -$1.77M |
|
433
Sherwin-Williams
SHW
$78.9B
| $441K | 0.04% |
4,821
+1,089
| +29% | +$103K |
|
434
Direxion Daily 20+ Year Treasury Bear 3X ETF
TMV
$179M
| $440K | 0.04% |
5,160
+5,120
| +12,800% | +$401K |
|
435
Zimmer Biomet
ZBH
$17.2B
| $440K | 0.04% |
+4,157
| New | +$460K |
|
436
CALL
Micron Technology
MU
$1.08T
| $438K | 0.04% |
1,229
-490
| -29% | -$13.1K |
|
|
RDS.A
437
PUT
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $438K | 0.04% |
1,276
+886
| +227% | +$53.9K |
|
438
Nu Skin
NUS
$253M
| $436K | 0.04% |
9,264
+6,855
| +285% | +$371K |
|
|
BRLI
439
DELISTED
BIO-REFERENCE LABS INC-NEW-
BRLI
| $436K | 0.04% |
+10,583
| New | +$379K |
|
440
CALL
Salesforce
CRM
$133B
| $431K | 0.04% |
961
-16
| -2% | -$1.14K |
|
441
CALL
Under Armour
UAA
$3.1B
| $431K | 0.04% |
1,714
+820
| +92% | +$32.9K |
|
442
Vertex Pharmaceuticals
VRTX
$120B
| $431K | 0.04% |
3,493
-8,188
| -70% | -$1.03M |
|
|
RUSL
443
DELISTED
Direxion Daily Russia Bull 2X Shares
RUSL
| $431K | 0.04% |
+8,883
| New | +$529K |
|
444
PUT
Las Vegas Sands
LVS
$30B
| $428K | 0.04% |
588
+21
| +4% | +$1.12K |
|
445
PUT
Cummins
CMI
$91.2B
| $425K | 0.04% |
292
+223
| +323% | +$30.7K |
|
446
PUT
Walt Disney
DIS
$166B
| $425K | 0.04% |
1,146
+479
| +72% | +$52.6K |
|
447
SL Green Realty
SLG
$3.56B
| $425K | 0.04% |
4,000
+1,005
| +34% | +$118K |
|
|
X
448
PUT
DELISTED
US Steel
X
| $424K | 0.04% |
1,221
-383
| -24% | -$9.39K |
|
|
XOMA
449
DELISTED
Xoma
XOMA
| $424K | 0.04% |
5,465
+2,989
| +121% | +$215K |
|
|
ETP
450
CALL
DELISTED
Energy Transfer Partners L.p.
ETP
| $424K | 0.04% |
411
+213
| +108% | +$11.9K |
|
Similar funds
Simplex Trading's Q2 2015 Portfolio in Review
As of Q2 2015, Simplex Trading held 6,639 positions worth $1.19B, up 39% from $860M the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $279M of net new capital in Q2 2015, opening 1,607 new positions and adding to 1,829 existing holdings. Its largest new stake was IBM: 85,948 shares worth $13.4M.
By sector, the portfolio is most concentrated in Communication Services at 14% of assets, up from 7.8% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Intel, an estimated $5.04M trimmed.
- Simplex Trading's largest Q2 2015 buy was IBM: 85,948 shares worth $13.4M.
- Simplex Trading added most to Alphabet (Google) Class C in Q2 2015, an estimated $54.6M increase.
- Simplex Trading's biggest Q2 2015 reduction was Intel, cutting an estimated $5.04M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2015, selling an estimated $10.1M.
- Simplex Trading's ten largest holdings make up 20% of its $1.19B portfolio in Q2 2015.
- Simplex Trading opened 1,607 new positions and closed 1,438 in Q2 2015.
- Simplex Trading's portfolio value rose 39% quarter-over-quarter to $1.19B.
Based on Simplex Trading's 13F filing for Q2 2015, filed 8 Jul 2015.