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
|
+$40.1M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
+$12.5M |
| 3 |
Alibaba
BABA
|
+$10.5M |
| 4 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$9.89M |
| 5 |
Intel
INTC
|
+$9.83M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$35.7M |
| 2 |
Gilead Sciences
GILD
|
+$32.3M |
| 3 |
Amazon
AMZN
|
+$29M |
| 4 |
Booking.com
BKNG
|
+$28.4M |
| 5 |
Baidu
BIDU
|
+$13.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 7.76% |
| 2 | Consumer Discretionary | 7.62% |
| 3 | Healthcare | 7.24% |
| 4 | Technology | 6.95% |
| 5 | Financials | 4.83% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
276
Nike
NKE
$62.6B
| $585K | 0.07% |
+11,662
| New | +$558K |
|
277
CALL
Alaunos Therapeutics
TCRT
$4.76M
| $585K | 0.07% |
8
+7
| +700% | +$10.4K |
|
278
Colgate-Palmolive
CL
$73.3B
| $582K | 0.07% |
8,394
+6,795
| +425% | +$470K |
|
279
Rockwell Automation
ROK
$51B
| $580K | 0.07% |
5,001
+3,462
| +225% | +$389K |
|
|
PSXP
280
DELISTED
PHILLIPS 66 PARTNERS LP
PSXP
| $580K | 0.07% |
+8,208
| New | +$590K |
|
|
BNY
281
Bank of New York Mellon
BNY
$110B
| $576K | 0.07% |
14,326
+384
| +3% | +$15K |
|
282
Moody's
MCO
$85.5B
| $576K | 0.07% |
+5,551
| New | +$536K |
|
283
Perrigo
PRGO
$1.45B
| $574K | 0.07% |
+3,468
| New | +$553K |
|
284
Stratasys
SSYS
$713M
| $574K | 0.07% |
10,883
-6,219
| -36% | -$412K |
|
|
MON
285
DELISTED
Monsanto Co
MON
| $574K | 0.07% |
+5,104
| New | +$607K |
|
286
Herc Holdings
HRI
$5.04B
| $573K | 0.07% |
+8,817
| New | +$589K |
|
287
Wheaton Precious Metals
WPM
$50.6B
| $572K | 0.07% |
+30,077
| New | +$640K |
|
288
Invesco CurrencyShares Japanese Yen Trust
FXY
$425M
| $570K | 0.07% |
+7,047
| New | +$575K |
|
|
WFM
289
CALL
DELISTED
Whole Foods Market Inc
WFM
| $568K | 0.07% |
742
-420
| -36% | -$22.5K |
|
290
Canadian Pacific Kansas City
CP
$81.1B
| $566K | 0.07% |
15,490
+9,975
| +181% | +$368K |
|
291
PUT
Herbalife
HLF
$1.26B
| $566K | 0.07% |
3,372
-1,982
| -37% | -$33.8K |
|
|
BKS
292
DELISTED
Barnes & Noble
BKS
| $561K | 0.07% |
36,085
+31,220
| +642% | +$490K |
|
293
Range Resources
RRC
$9.13B
| $560K | 0.07% |
10,761
+5,828
| +118% | +$289K |
|
294
Delta Air Lines
DAL
$54.9B
| $557K | 0.06% |
12,407
-56,371
| -82% | -$2.61M |
|
295
Altria Group
MO
$121B
| $557K | 0.06% |
+11,152
| New | +$592K |
|
296
Travel + Leisure Co
TNL
$4.71B
| $557K | 0.06% |
13,649
-5,311
| -28% | -$211K |
|
|
LNKD
297
PUT
DELISTED
LinkedIn Corporation
LNKD
| $557K | 0.06% |
931
-24
| -3% | -$5.96K |
|
298
iShares Silver Trust
SLV
$28.8B
| $552K | 0.06% |
+34,708
| New | +$556K |
|
299
CALL
UnitedHealth
UNH
$392B
| $552K | 0.06% |
1,234
+1,048
| +563% | +$116K |
|
300
Melco Resorts & Entertainment
MLCO
$2.13B
| $550K | 0.06% |
25,659
-49,997
| -66% | -$1.2M |
|
Similar funds
Simplex Trading's Q1 2015 Portfolio in Review
As of Q1 2015, Simplex Trading held 6,670 positions worth $860M, up 4.2% from $826M the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q1 2015 filing shows 1,973 new, 1,386 increased, 1,513 reduced and 1,643 closed positions. Its largest new stake was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M. The largest sale was Apple, an estimated $35.7M.
By sector, the portfolio is most concentrated in Communication Services at 7.8% of assets, up from 4.8% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q1 2015 buy was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M.
- Simplex Trading added most to Alibaba in Q1 2015, an estimated $10.5M increase.
- Simplex Trading's biggest Q1 2015 reduction was Apple, cutting an estimated $35.7M.
- Simplex Trading fully exited Amazon in Q1 2015, selling an estimated $29M.
- Simplex Trading's ten largest holdings make up 15% of its $860M portfolio in Q1 2015.
- Simplex Trading opened 1,973 new positions and closed 1,643 in Q1 2015.
- Simplex Trading's portfolio value rose 4.2% quarter-over-quarter to $860M.
Based on Simplex Trading's 13F filing for Q1 2015, filed 21 Apr 2015.