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 | |
|---|---|---|---|---|---|---|
|
CELG
526
PUT
DELISTED
Celgene Corp
CELG
| $337K | 0.03% |
2,087
-212
| -9% | -$24.2K |
|
527
Starbucks
SBUX
$119B
| $336K | 0.03% |
6,284
-8,118
| -56% | -$412K |
|
528
PUT
Walmart Inc
WMT
$870B
| $336K | 0.03% |
1,878
-375
| -17% | -$9.56K |
|
529
CALL
Marathon Petroleum
MPC
$92.2B
| $334K | 0.03% |
1,231
+309
| +34% | +$15.7K |
|
|
DISCK
530
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $334K | 0.03% |
10,763
+10,748
| +71,653% | +$333K |
|
531
Labcorp
LH
$23.1B
| $333K | 0.03% |
+3,200
| New | +$333K |
|
532
Air Products & Chemicals
APD
$66.1B
| $332K | 0.03% |
+2,629
| New | +$359K |
|
533
CALL
Deere & Co
DE
$164B
| $330K | 0.03% |
691
+468
| +210% | +$42.6K |
|
534
Henry Schein
HSIC
$9.66B
| $330K | 0.03% |
+5,926
| New | +$328K |
|
535
Signet Jewelers
SIG
$3.52B
| $330K | 0.03% |
2,574
-1,322
| -34% | -$177K |
|
536
PUT
United States Oil Fund
USO
$2.36B
| $330K | 0.03% |
123
-71
| -37% | -$11.3K |
|
|
CBI
537
CALL
DELISTED
Chicago Bridge & Iron Nv
CBI
| $329K | 0.03% |
781
+234
| +43% | +$12.2K |
|
|
HBI
538
DELISTED
Hanesbrands
HBI
| $327K | 0.03% |
9,833
+8,271
| +530% | +$271K |
|
539
PUT
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $326K | 0.03% |
353
+72
| +26% | +$20K |
|
540
PUT
Simon Property Group
SPG
$73.4B
| $326K | 0.03% |
310
+34
| +12% | +$6.25K |
|
|
ADVM
541
PUT
DELISTED
Adverum Biotechnologies
ADVM
| $325K | 0.03% |
+62
| New | +$20.9K |
|
542
PUT
RTX Corp
RTX
$262B
| $325K | 0.03% |
904
+286
| +46% | +$21K |
|
543
CALL
CF Industries
CF
$19.6B
| $324K | 0.03% |
1,610
+910
| +130% | +$55.4K |
|
|
TW
544
DELISTED
TOWERS WATSON & CO COM STK CL A (DE)
TW
| $324K | 0.03% |
2,581
+711
| +38% | +$95.4K |
|
545
Antero Resources
AR
$10.9B
| $323K | 0.03% |
9,420
+310
| +3% | +$12.3K |
|
546
CALL
Eli Lilly
LLY
$1.04T
| $323K | 0.03% |
585
-259
| -31% | -$19.7K |
|
|
AMAG
547
DELISTED
AMAG Pharmaceuticals
AMAG
| $322K | 0.03% |
+4,667
| New | +$294K |
|
548
Home Depot
HD
$330B
| $321K | 0.03% |
2,890
-9,591
| -77% | -$1.07M |
|
549
VF Corp
VFC
$6.74B
| $321K | 0.03% |
+4,897
| New | +$331K |
|
550
PUT
Bausch Health
BHC
$1.7B
| $320K | 0.03% |
1,411
+377
| +36% | +$83.6K |
|
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.