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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
KEP icon
5501
PUT
Korea Electric Power
KEP
$15.6B
– –
-30
Closed -$3K
KEY icon
5502
PUT
KeyCorp
KEY
$24.3B
– –
-34
Closed -$2K
KEYS icon
5503
Keysight
KEYS
$54.8B
– –
-1,239
Closed -$42.3K
KEYS icon
5504
PUT
Keysight
KEYS
$54.8B
– –
-47
Closed -$1K
KFRC icon
5505
Kforce
KFRC
$1.01B
– –
-46
Closed -$1K
KFY icon
5506
CALL
Korn Ferry
KFY
$4.03B
– –
-2
Closed -$1K
KFY icon
5507
Korn Ferry
KFY
$4.03B
– –
-2,029
Closed -$67K
KFY icon
5508
PUT
Korn Ferry
KFY
$4.03B
– –
-21
Closed -$9K
KIE icon
5509
State Street SPDR S&P Insurance ETF
KIE
$616M
– –
-546
Closed -$12K
KIM icon
5510
Kimco Realty
KIM
$17.6B
– –
-144
Closed -$3K
TBHC
5511
DELISTED
The Brand House Collective
TBHC
– –
-132
Closed -$3.31K
KMI icon
5512
Kinder Morgan
KMI
$73.1B
– –
-67,228
Closed -$2.81M
KNDI
5513
Kandi Technologies Group
KNDI
$65.2M
– –
-10,187
Closed -$110K
KOLD icon
5514
ProShares UltraShort Bloomberg Natural Gas
KOLD
$109M
– –
-411
Closed -$119K
KOPN icon
5515
CALL
Kopin
KOPN
$673M
– –
-29
Closed -$3K
KOS icon
5516
Kosmos Energy
KOS
$1.54B
$0 ﹤0.01%
9
-2,234
-100% -$19.9K
KPTI icon
5517
CALL
Karyopharm Therapeutics
KPTI
$165M
– –
-1
Closed -$3K
KRO icon
5518
KRONOS Worldwide
KRO
$764M
– –
-193
Closed -$2.42K
KTOS icon
5519
Kratos Defense & Security Solutions
KTOS
$8.98B
– –
-6,096
Closed -$36.2K
L icon
5520
Loews
L
$24.2B
– –
-5,831
Closed -$238K
LAB icon
5521
CALL
Standard BioTools
LAB
$333M
– –
-16
Closed -$2K
LAD icon
5522
PUT
Lithia Motors
LAD
$7.79B
– –
-122
Closed -$2K
LCII icon
5523
CALL
LCI Industries
LCII
$2.56B
– –
-13
Closed -$37K
LCTX icon
5524
CALL
Lineage Cell Therapeutics
LCTX
$259M
– –
-79
Closed -$15K
LDOS icon
5525
PUT
Leidos
LDOS
$14.2B
– –
-29
Closed -$9K
219 220
221
222 223

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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.