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 | |
|---|---|---|---|---|---|---|
|
FRC
751
DELISTED
First Republic Bank
FRC
| $222K | 0.02% |
3,532
-9,643
| -73% | -$583K |
|
|
BOBE
752
DELISTED
Bob Evans Farms, Inc.
BOBE
| $222K | 0.02% |
4,365
-2,128
| -33% | -$98.9K |
|
753
CALL
AutoZone
AZO
$47.6B
| $221K | 0.02% |
59
-4
| -6% | -$2.74K |
|
|
ALXN
754
PUT
DELISTED
Alexion Pharmaceuticals
ALXN
| $221K | 0.02% |
886
+625
| +239% | +$108K |
|
755
LiveRamp
RAMP
$2.29B
| $219K | 0.02% |
+12,474
| New | +$224K |
|
756
Toyota
TM
$209B
| $219K | 0.02% |
1,638
-1,547
| -49% | -$213K |
|
757
CALL
Heron Therapeutics
HRTX
$85.5M
| $218K | 0.02% |
327
+253
| +342% | +$4.76K |
|
758
Vanguard Small-Cap ETF
VB
$79.2B
| $217K | 0.02% |
1,791
+1,091
| +156% | +$134K |
|
|
JOYY
759
PUT
JOYY Inc
JOYY
$3.66B
| $217K | 0.02% |
380
+338
| +805% | +$22.5K |
|
|
HOLX
760
DELISTED
Hologic
HOLX
| $215K | 0.02% |
+5,666
| New | +$198K |
|
761
PUT
ATI
ATI
$26.9B
| $214K | 0.02% |
220
+200
| +1,000% | +$6.61K |
|
762
Monster Beverage
MNST
$91.5B
| $213K | 0.02% |
9,576
-43,422
| -82% | -$969K |
|
763
Prothena Corp
PRTA
$447M
| $213K | 0.02% |
4,055
-5,005
| -55% | -$198K |
|
|
INFN
764
CALL
DELISTED
Infinera Corporation Common Stock
INFN
| $213K | 0.02% |
310
+219
| +241% | +$4.45K |
|
765
Conagra Brands
CAG
$6.81B
| $212K | 0.02% |
+6,254
| New | +$188K |
|
766
Hilton Worldwide
HLT
$72.5B
| $212K | 0.02% |
2,568
-4,408
| -63% | -$387K |
|
767
MBIA
MBI
$297M
| $211K | 0.02% |
35,196
+17,860
| +103% | +$161K |
|
|
DYN
768
DELISTED
Dynegy, Inc.
DYN
| $211K | 0.02% |
7,242
+6,941
| +2,306% | +$226K |
|
769
Scotiabank
BNS
$105B
| $210K | 0.02% |
4,258
+2,171
| +104% | +$111K |
|
770
CALL
Danaher
DHR
$134B
| $210K | 0.02% |
826
+673
| +440% | +$38.5K |
|
|
DISH
771
DELISTED
DISH Network Corp.
DISH
| $210K | 0.02% |
3,115
+888
| +40% | +$62.1K |
|
|
CRAY
772
DELISTED
Cray, Inc.
CRAY
| $209K | 0.02% |
7,093
+4,387
| +162% | +$133K |
|
773
PUT
Cheniere Energy
LNG
$57B
| $208K | 0.02% |
482
+154
| +47% | +$11.5K |
|
774
Teekay
TK
$971M
| $208K | 0.02% |
4,867
+4,451
| +1,070% | +$211K |
|
|
RPTP
775
CALL
DELISTED
RAPTOR PHARMACEUTICAL CORP COM STK (DE)
RPTP
| $208K | 0.02% |
492
+126
| +34% | +$1.53K |
|
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.