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 | |
|---|---|---|---|---|---|---|
|
MOMO
476
Hello Group
MOMO
$876M
| $391K | 0.03% |
24,325
+23,156
| +1,981% | +$323K |
|
|
PNRA
477
DELISTED
Panera Bread Co
PNRA
| $388K | 0.03% |
+2,221
| New | +$399K |
|
|
UWC
478
PUT
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $388K | 0.03% |
772
+64
| +9% | +$32.2K |
|
479
Autohome
ATHM
$2.48B
| $387K | 0.03% |
7,660
+4,818
| +170% | +$237K |
|
|
ATCO
480
DELISTED
Atlas Corp.
ATCO
| $387K | 0.03% |
20,522
-187
| -0.9% | -$3.69K |
|
|
JMEI
481
CALL
DELISTED
Jumei International Holding Limited American depositary shares, each representing ten Class A ordina
JMEI
| $386K | 0.03% |
90
+78
| +650% | +$17.4K |
|
|
EMBJ
482
Embraer S.A. ADS
EMBJ
$11.8B
| $385K | 0.03% |
12,723
+12,629
| +13,435% | +$390K |
|
483
CALL
HCA Healthcare
HCA
$82.5B
| $383K | 0.03% |
731
+354
| +94% | +$28.4K |
|
484
ProShares UltraShort Yen
YCS
$34.2M
| $381K | 0.03% |
16,532
+12,740
| +336% | +$290K |
|
485
PUT
Amgen
AMGN
$198B
| $378K | 0.03% |
1,085
+557
| +105% | +$89.2K |
|
486
PUT
Viatris
VTRS
$19.8B
| $377K | 0.03% |
2,531
+1,132
| +81% | +$80K |
|
487
PUT
Vanguard S&P 500 ETF
VOO
$979B
| $376K | 0.03% |
1,299
+1,043
| +407% | +$201K |
|
488
PUT
Citigroup
C
$222B
| $375K | 0.03% |
1,868
+1,257
| +206% | +$68.4K |
|
489
Nokia
NOK
$57.4B
| $375K | 0.03% |
54,813
+54,304
| +10,669% | +$396K |
|
490
Cemex
CX
$18.4B
| $374K | 0.03% |
44,164
+16,909
| +62% | +$151K |
|
491
ProShares Ultra Financials
UYG
$803M
| $374K | 0.03% |
15,204
+3,810
| +33% | +$95.2K |
|
492
American Eagle Outfitters
AEO
$2.99B
| $373K | 0.03% |
+21,684
| New | +$365K |
|
493
BHP
BHP
$215B
| $372K | 0.03% |
10,266
+8,077
| +369% | +$326K |
|
494
PUT
MBIA
MBI
$306M
| $370K | 0.03% |
1,361
+1,102
| +425% | +$9.95K |
|
495
Tapestry
TPR
$29B
| $368K | 0.03% |
+10,649
| New | +$407K |
|
496
PUT
AutoZone
AZO
$48.5B
| $366K | 0.03% |
318
+189
| +147% | +$129K |
|
|
EGRX
497
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $363K | 0.03% |
+4,495
| New | +$293K |
|
|
HAR
498
DELISTED
Harman International Industries
HAR
| $363K | 0.03% |
3,054
+2,758
| +932% | +$355K |
|
|
RGLS
499
DELISTED
Regulus Therapeutics
RGLS
| $362K | 0.03% |
275
+270
| +5,400% | +$436K |
|
500
CALL
Precigen
PGEN
$1.9B
| $361K | 0.03% |
178
-29
| -14% | -$1.22K |
|
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.