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Simplex Trading

Simplex Trading Portfolio holdings

AUM $149B
1-Year Est. Return 62.07%
 

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.

This Fund
S&P 500
This Quarter Est. Return
+0.54%
1 Year Est. Return
+62.07%
3 Year Est. Return
+116.86%
5 Year Est. Return
+116.02%
10 Year Est. Return
+774.44%
AUM
$1.19B
AUM Growth
+$333M
Cap. Flow
+$279M
Cap. Flow %
23.35%
Top 10 Hldgs %
20.47%
Holding
6,639
New
1,607
Increased
1,829
Reduced
1,589
Closed
1,438

Top Buys

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$54.6M
2
AAPL icon
Apple
AAPL
+$29.1M
3
META icon
Meta Platforms (Facebook)
META
+$15.7M
4
IBM icon
IBM
IBM
+$13.8M
5
BIDU icon
Baidu
BIDU
+$10.6M

Top Sells

Rank Stock Value
1
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$10.1M
2
MCD icon
McDonald's
MCD
+$8.46M
3
RL icon
Ralph Lauren
RL
+$5.36M
4
INTC icon
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
PLD icon
4326
CALL
Prologis
PLD
$137B
$2K ﹤0.01%
34
+24
+240% +$976
PLUG icon
4327
Plug Power
PLUG
$2.87B
$2K ﹤0.01%
1,086
-5,344
-83% -$14K
PPL
4328
PUT
PPL Corp
PPL
$27.1B
$2K ﹤0.01%
19
-9
-32% -$281
PRDO icon
4329
Perdoceo Education
PRDO
$1.99B
$2K ﹤0.01%
629
-848
-57% -$3.58K
PSEC icon
4330
PUT
Prospect Capital
PSEC
$1.12B
$2K ﹤0.01%
+41
New +$329
PTEN icon
4331
CALL
Patterson-UTI
PTEN
$3.57B
$2K ﹤0.01%
78
+36
+86% +$747
QDEL icon
4332
CALL
QuidelOrtho
QDEL
$1.15B
$2K ﹤0.01%
+37
New +$862
RBBN icon
4333
PUT
Ribbon Communications
RBBN
$359M
$2K ﹤0.01%
7
-81
-92% -$635
REI icon
4334
PUT
Ring Energy
REI
$297M
$2K ﹤0.01%
+20
New +$235
RHI icon
4335
CALL
Robert Half
RHI
$4.07B
$2K ﹤0.01%
+157
New +$8.98K
RHI icon
4336
PUT
Robert Half
RHI
$4.07B
$2K ﹤0.01%
+10
New +$572
RMD icon
4337
CALL
ResMed
RMD
$29.5B
$2K ﹤0.01%
12
-129
-91% -$8.14K
RMTI icon
4338
PUT
Rockwell Medical
RMTI
$27.6M
– –
-1
Closed -$1.27K
ROL icon
4339
Rollins
ROL
$18.8B
$2K ﹤0.01%
+225
New +$2.54K
ROP icon
4340
PUT
Roper Technologies
ROP
$37.1B
$2K ﹤0.01%
+8
New +$1.39K
RVTY icon
4341
CALL
Revvity
RVTY
$12.1B
$2K ﹤0.01%
21
-3
-13% -$156
SABR icon
4342
PUT
Sabre
SABR
$704M
$2K ﹤0.01%
+23
New +$580
SAIC icon
4343
CALL
Saic
SAIC
$5.01B
$2K ﹤0.01%
9
-41
-82% -$2.14K
SANW
4344
CALL
DELISTED
S&W Seed Co
SANW
$2K ﹤0.01%
+1
New +$90
SAP icon
4345
CALL
SAP
SAP
$200B
$2K ﹤0.01%
18
-25
-58% -$1.85K
SBSW icon
4346
PUT
Sibanye-Stillwater
SBSW
$6.05B
$2K ﹤0.01%
6
+2
+50% +$15
SCHB icon
4347
CALL
Schwab US Broad Market ETF
SCHB
$42.8B
$2K ﹤0.01%
+558
New +$4.77K
SCHW
4348
PUT
Charles Schwab
SCHW
$181B
$2K ﹤0.01%
95
-34
-26% -$1.07K
SCOR icon
4349
CALL
Comscore
SCOR
$107M
– –
0
– –
SEM
4350
DELISTED
Select Medical
SEM
$2K ﹤0.01%
293
-854
-74% -$7.17K
172 173
174
175 176

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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.